Evgeny Bronov

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How to make a motor for a boat yourself?

With a limited budget and golden hands, you can not only do it yourself, but also drive to it. There are several mechanisms that are not used for their original purpose, from which a solid construction can be obtained. This article will present options for obtaining a homemade outboard motor and manufacturing instructions.

In most houses and apartments you can find an old drill or screwdriver. Even in a new form, they are more affordable than an industrial motor. If they run on batteries and have a button for speed control, then the principle of working with an electric motor is similar.

The presence of a battery as a power source.
A propeller with a gearbox propels the craft.
The engine controls are a reverse button and a speed control knob.

For the most part, factory boat products are sealed, and therefore they allow use in water. This fact is excluded when choosing a drill or screwdriver as a homemade outboard motor, because they are leaky.

But it is worth remembering that the penetration of moisture into the controls of an electric drill is fraught with trouble. The engine will stop and the boat will stop. The advantage is that finding spare parts for a drill is very easy.

Another significant point is that it is not designed to work continuously. This is not very suitable for boat engines. Therefore, it is desirable to create a power reserve in order to avoid overheating of homemade products.

You need to start from one hundred and fifty watts and more.
In this case, it is realistic to choose a propeller with a diameter of one hundred and thirty millimeters.
The total weight of the vessel is no more than three hundred kilograms.

The voltage of a drill and a screwdriver can be different, as well as batteries for them. But the capacity of the latter is not enough to control the boat. Then a car battery that produces twelve volts will do. With the same voltage, it is better to choose a drill.

Of course, a battery of batteries for any voltage will save the situation. But the cost of such a device can be expensive.

To make homemade motors from a drill for boats, you need to assemble a set of fixtures and tools:

If you need to quickly get the propeller, then it is advisable to make a lifting mechanism to control the motor in a vertical and horizontal position.

To create a mechanism, you need to provide the clamps with rings and pass a tube through them. Such an articulated device ensures the reliability of the steering wheel.

Reducer and propeller

The revolutions of the drill are slightly higher than those required for the operation of the propeller. The reducer will adjust the difference.

The upper gearbox is able to reduce the speed from one and a half thousand to three hundred. In this scenario, a homemade motor will allow the boat to move smoothly.
The lower gearbox is important for the horizontal setting of the propeller. If it is taken from a grinder, it is enough to clamp it in a screwdriver chuck.

To make a screw propeller, you need to select certain segments on the steel sheet. A square of two hundred by two hundred millimeters and a thickness of three is enough. Stainless steel is much more difficult to carve, but is preferred and lasts longer. You can also take a blade from a household exhaust fan.

Holes need to be made in the center of the sheet. They are required for the landing screw. Slots are made diagonally, leaving a circle of thirty millimeters in the center.

The blades should be round and equal. Each one must be turned at a certain angle and direction of rotation so that there is no oscillation of the screw.

A trial "swim" is done in any container with water into which the screw will fit. You can go to a small pond and lower the screw into the water without a boat. Such a test will show whether the motor made is ready for swimming.

A properly assembled electric motor will beat off a trickle of water, but without vibrations. If something went wrong, the design made on can always be brought to mind with the help of a larger angle of inclination of the blades.

Before you make a motor for a boat, you need to understand how it will move with it. It is important to take into account the weight of the vessel with all things, engine power, current strength and operating voltage. The motor power for a rubber boat or PVC should be at least twenty percent more than the load power. This advantage is useful in case of force majeure.

It is advisable to measure the voltage under load and during idling using a special device.

An excellent homemade outboard motor is obtained from a trimmer. Such an electric motor is made simply because of the similarity of the devices.

A trimmer or mower does not need to take anything away and heavily redo it. In particular, the top gearbox remains the same, as does the motor power supply and control system.

The option is considered very profitable and convenient, because the device has a transmission and an engine. It remains to make a mount for the boat, remove the area with the disk and put the propeller. But let's not forget about the shortcomings.

It is worth remembering that the motor for a boat from a trimmer has low power. It is difficult for such a device to swim against the current.
The outboard motor from the trimmer is ideal for moving on small bodies of water with stagnant water. And this is not always the ultimate dream of outdoor enthusiasts.
You will have to get used to the strong noise effect and smoke.

In general, such a home-made outboard motor is not a very cheap option due to the cost of a mower. But if it already exists and defects have appeared in it, it can easily be converted into an engine for a variety of models of floating craft. It is suitable for small boats, a plywood boat can withstand it due to the lightness of the design and is also inflatable.

Homemade outboard motor from a walk-behind tractor

If the previous option is considered low-power, then the device from the walk-behind tractor is the opposite. Earthmoving equipment usually has reliable four-stroke internal combustion engines. Such a do-it-yourself motor for a boat is capable of carrying passengers even against the current at an impressive speed.

True, a decent volume does not allow to put such structures on PVC boats. At least on small ones. The principle of how to make a boat motor from a walk-behind tractor is as follows.

Together with the cutters, aluminum blades are placed in the same plane with the shaft.
The blades must be perpendicular to the movement of the vessel. In appearance, these are rectangular plates, half hidden under water. The rest is free to move through the air.
The device is attached to the hull of the craft and allows it to move easily even in shallow water and reservoirs with a rapid current.

Possible do-it-yourself crafts for a PVC boat

A homemade outboard motor can be built from a ventilation engine or a stove from a passenger car. Or take the car compressor "Gnome".

However, these models have a number of disadvantages.

The first option is immersed on the shaft. However, the tightness is broken. We have to think about how to solve this problem quickly.
The compressor is considered more powerful and is installed vertically from above. At the same time, it is connected to the screw through an angular gearbox and a shaft.

It is realistic to work with these structures if you have technical experience. Otherwise, it is better to contact a mechanic.

For example, someone who uses boats for a motor, made without anyone's help from plywood, is able to cope with the alteration of a walk-behind tractor.

With all the variety of outboard motors, do-it-yourself PVC made for a ship are acceptable options. According to the reviews, it can be judged that the duration of their work does not differ from the factory ones with competent alteration and assembly.

It is worth remembering that before using it on high water, you need to test the manufactured outboard motor with your own hands. This can be done at least near the shore of the reservoir. In any case, the experience gained will always help when faced with surprises in the operation of electric motors.

Unlike ancient times, when one could only rely on the forces of nature to hope for a tailwind, today it is possible to move on the surface of the water in any direction without significant physical effort and in complete calm.

Thanks to scientists who have produced electricity for humanity and tamed the fire of an internal combustion engine, any boatman can independently attach some kind of motor to his watercraft.

What can a boat motor be made of?

A boat motor can be made from many mechanisms that gather dust in a barn or garage and are not used for their intended purpose.

It often happens that the equipment breaks down, and in order to fix it, you need to spend more than half the cost of a new device. It is much easier in this case to purchase a new device, and put the old one aside and use it as a source of spare parts and various bolts and nuts. It is from such devices that you can make a boat motor.

If such devices are not available, then you can inexpensively purchase such a mechanism in the secondary market. The main thing is that the engine is in good condition in such devices.

Trimmer outboard motor

By minimally changing the design of the trimmer, you can arrange an excellent traction unit for a boat of any design. There is already an engine and transmission in such a device, it is enough to make a mount for the boat, and instead of a bobbin with fishing line or a disk, install a propeller.

Before making a boat motor from a trimmer, it should be understood that the power of such devices is very small, and it is unlikely that it will be possible to move against a strong current.

The trimmer as a boat motor is ideal for use on a lake or pond.

The disadvantages of using this device include a high noise level. In addition, at a low speed of movement, you will have to breathe absolutely all the products of the "vital activity" of this system.

Boat motor from a screwdriver

Outboard motors on electric traction have excellent indicators in terms of noise production and environmental friendliness. You can make a motor for a boat from a screwdriver, but the power of the device should not be less than 300 watts. To transmit torque to the screw, which is located under water, you can use a flexible shaft from the trimmer.

A small aluminum screw from a car fan is used as a propeller, and car batteries with a capacity of 60 Ah are used to ensure a long time for such a device.

The disadvantages of such designs is the need to carry a fully charged car battery with you. The mass of such a part is more than 20 kg. The disadvantages include the limited stroke of such a motor, after the battery is discharged, it will be necessary to manually set the boat in motion again.

Boat motor from walk-behind tractor

The most powerful of home-made outboard motors is considered to be a device made from a walk-behind tractor. The gardening equipment is equipped with hardy and durable four-stroke internal combustion engines, which, when installed on a watercraft,

will allow him to develop a decent speed both with the flow and against it. Such engines have a significant mass and, usually, not used on PVC boats.

The easiest way to install an outboard motor of this design is to minimally alter the main structure. It is enough to attach a walk-behind tractor to the boat hull, and install aluminum blades instead of cutters. The blades must be located in the same plane with the shaft, which in this case is perpendicular to the movement of the craft. The blades have the form of rectangular plates, which should be lowered into the water with the lower half, and the upper part should move freely through the air. Such a paddle wheel device will allow you to move at high speed even in places where the depth does not exceed half a meter. A boat engine made from a fast-moving motoblock does an excellent job.

Other options

You can make a homemade engine not only using trimmers and screwdrivers as a basis. If there is a desire to design an outboard motor on your own and there is a significant amount of time and money, then any technical device equipped with an internal combustion engine or driven by an electric motor can be used as a power unit.

Many craftsmen put engines from motorcycles on the boat. In this case, it is possible to regulate the speed of the propeller by shifting the gearbox. Powerful 12-volt motors, which are used in various mechanisms, can be successfully used as boat engines.

We make a boat motor with our own hands

It is not difficult to make a boat motor - it is enough to prepare all the parts necessary for this and assemble the device in such a way as to exclude the possibility of damage to the boat during the operation of such a unit, and ensure safety for people.

The easiest option for making a homemade motor from a trimmer. For assembly, you will need the following materials and tools:

Trimmer.
Spanners.
Pliers.
Screwdriver.
Bulgarian or hacksaw for metal.
Drill and twist drills for metal.
Stud 12 mm.
Vice.

To make a working version of the outboard motor, you will need to purchase a trimmer. You can use any model, but the more powerful the device, the boat will have higher speed characteristics

Making a propeller is the first thing to start with. For the screw, a dural plate with a size of 100 - 30 mm is used. Exactly in the middle of such a plate, it is necessary to make a hole for installing it on the trimmer shaft. The hole diameter depends on the thickness of the gearbox shaft and is usually 17 mm. Before bending the duralumin plate, it must be annealed. Then, with pliers, each side is slightly bent so that during axial rotation of such a plate, its step is no more than 10 mm.

Then the reel is removed from the mower and a screw is installed in its place. It is necessary to tighten the nut well so that the screw does not turn during operation. The trimmer discs are fixed with a nut with a left-hand thread, so when the outboard motor is running, you can not be afraid of losing the screw due to unscrewing the nut.

Then you need to make reliable fasteners with which the trimmer will be installed on the boat. On the body of the trimmer at the junction of the two halves there is a ring for attaching the belt. It is this part that will connect the trimmer body to the boat. It is necessary to make a mount that will securely connect the hull of the boat to the "eye" of the trimmer. For this purpose, you can use a mechanical meat grinder, in which the lower part is separated using a grinder or a hacksaw. Then a hole with a diameter of 12 mm is made in the body of the resulting clamp. The hole must be located in the transverse plane of the screw clamp.

From a metal stud with a diameter of 12 mm, it is necessary to cut a piece 100 mm long. On the one hand, this segment of the stud is slightly flattened and a hole with a diameter of 6 mm is made in it. A 6 mm bolt is threaded into this hole, on which the “eye” of the trimmer is installed. The bolt must be tightened with a self-locking nut.

The process of installing the motor on the boat occurs in the following sequence:

the mount is installed on the transom and securely fixed with a threaded connection;
a homemade outboard motor is installed in the mounting hole.

The motor can be started and steered by holding the boat motor body evenly, and if necessary, tilt it in the opposite direction of the boat turn.

Reducer and its effect on work

The use of a gearbox for a boat motor allows you to change the direction of axial rotation. The gearbox changes the speed of rotation of the shaft several times, which has a positive effect on the working life of the engine. When equipped with a gearbox for an outboard motor, you should adhere to the golden mean and do not install a device with a large gear ratio. Failure to do so will result in excessive fuel consumption, slow boat speed, and engine overheating. The surest way to find the optimum gear ratio for a given motor is to test several different devices. If during operation there is no excessive load, which manifests itself in the impossibility of quickly gaining high speed and the speed of the watercraft is quite high, then this gear ratio can be considered optimal for this engine.

An average gear ratio that will work well with many internal combustion engines used as a boat motor is 1/5.

Electric motors can be used as traction for boats without a gearbox. The traction force of such devices is sufficient to work stably in the mode of direct transmission of torque to the propeller. An excellent engineering solution is to use an electric motor underwater. With this arrangement, the screw is fixed directly on the motor shaft.

Homemade motor with gearbox

It is not easy to make a motor with a gearbox on your own, but this design will allow you to change the speed of the boat and change the traction characteristics of the propeller. This design is convenient when trolling, in addition, switching to a lower gear will allow the boat to move more efficiently against strong winds and with a significant load.

The most compact version of the engine that you can make yourself is a device that uses a two-stroke engine from the Karpaty moped as a power unit. Such a device will have only two speeds, but this is quite enough.

The engine is mounted on a self-made frame, which is a cut off part of the moped frame. The right cover and the drive sprocket are removed, and a small gearbox is attached to the shaft, to which a standard “leg” from the Whirlwind outboard motor is then attached, through which the torque is transmitted. All parts must be installed in such a way that the design is as balanced as possible, otherwise a noticeable distortion will be felt during movement, and when using such an engine with a PVC boat, the boat may capsize. The control handle of such a device must be at least 0.5 length, otherwise, while driving the boat, you can get burned from a hot engine and muffler knee.

The advantages of such a boat motor are very quiet operation, low fuel consumption and the ability to switch to a lower gear when necessary.

In "KiYa" No. 92, an article "Motor in a backpack" was published, where talked about a homemade outboard motor assembled by hand, weighing only 5.5 kg. The article was for informational purposes and, apart from a photograph of the motor, did not contain details of the design and technological order.

After the publication of the article, the author and the editors of the magazine received numerous letters from readers with a request to provide drawings for the refinement of the D5 engine and recommendations on the technology of hand-made manufacture of individual parts. The author used the D5 engine from a moped produced in previous years, which had a magneto with a rotor diameter of 37 mm. The currently produced engines of the "D" type differ from the "D5" only in the increased size of the magneto, which does not affect the design of the outboard motor at all. True, the weight of the engine will increase by about 0.2 kg.

The crankshaft is preliminarily disassembled into two halves, which are connected by a crank pin with an interference fit. The part of the crankshaft on which the magneto is attached is called the upper part, the part on which there is a trunnion with a suction hole is called the lower part.

From both parts we cut off massive rings at the place of welding. The top trunnion must be lengthened to accommodate the main bearing, magneto rotor, ignition cam and flywheel. An M10 thread is cut at its end. At the final assembly, the magneto rotor, cam and flywheel are mounted on the shaft and tightened with an M10 nut. To lengthen the trunnion, a blank of round steel grade 45 with a diameter of at least 18 mm and a length of 100 mm is required. On a lathe, a shank with an M10x1.0 thread 10 mm long is machined at one of the ends. Then the upper part of the shaft is installed in the lathe and carefully centered on the neck of the shaft with a diameter of 17P. A trunnion is cut off from the left end of this half at a distance of 13 mm. In the rest of the trunnion, a hole for the M10x1.0 thread is bored to a depth of 12 mm. We screw the workpiece with a threaded end into the pin hole and tighten it with a key with a torque of 3 kg / cm. A V-shaped groove is machined at the junction. Having wrapped the trunnion with an asbestos cord (except for the groove), we weld the joint by manual electric welding to a seam diameter of at least 18 mm. After that, you can make the final turning of the shaft.

Having processed both halves of the crank to the dimensions indicated in the drawing, the crankshaft can be assembled. After its assembly and final alignment, the crank pin from the ends is welded to the cheeks at three points by electric welding, followed by cleaning the welding spots with emery.

The square shank of the lower trunnion (section B-B) is made in a simpler way, since there is already a threaded hole in the trunnion. The square is made of steel 45, hardened and, after screwing into the trunnion, is welded by manual electric welding without further machining.

The coordinates of twelve holes with a diameter and a depth of 7 mm on the cheeks of the crank are chosen arbitrarily in place; they are made to lighten the shaft. The finished crankshaft should weigh 0.6 kg; in combination with other rotating masses (magneto rotor, flywheel) it ensures stable operation of the engine.

The landing hole in the magneto rotor is bored to a diameter of 12 mm and, when mounted on the shaft, is fixed with a pin with a diameter of 2 mm.

The ignition cam must be made new from steel 35. Its working profile is made according to the standard cam, then the cam is ground and hardened. The cam is attached to the rotor with a pin. Therefore, the magneto rotor must have pin holes on both sides.

The flywheel is made of steel 35 and is locked on the shaft with three M5x10 mm set screws, under which conical recesses must be drilled on the shaft (section B-B). This is done after the magneto rotor, ignition cam and flywheel are planted on the shaft with holes drilled for the set screws, but without threads, and everything is finally tightened with an M10 nut. Recesses for screws are drilled through the flywheel, thereby achieving the necessary accuracy in final assembly.

The deadwood of the outboard motor is made of a 32x3 mm round aluminum tube. Connecting flanges made of aluminum 6 mm thick are welded to its ends by argon-arc welding. Deadwood length 345 mm. An engine is attached to its upper flange through a gasket, to the lower flange also through a gasket made of oil-resistant rubber 4 mm thick - a gearbox with a propeller. A vertical shaft made of 12x1 steel pipe rotates inside the deadwood. Its length, together with welded squares, is 335 mm. A suspension bracket from is freely put on the deadwood, the inner hole of which is bored out to a diameter of 32 mm.

The gearbox from the Salyut motor is undergoing the greatest refinement. All parts of the water pump are removed and the holes are welded or sealed with epoxy. The main thing is that when the motor is assembled, water does not get into the cavity of the deadwood and gearbox. Water for cooling the cylinder is supplied by the hydrodynamic head of the propeller through an 8x1 mm aluminum pipe. It is attached to the bottom flange of the deadwood. Its end, facing the plane of rotation of the screw, is flared to a diameter of 12 mm and has a funnel shape. The center of the circle of this hole is located at a distance of 10 mm from the plane of rotation of the rear edge of the screw and 80 mm from the axis of the screw. The other end of the tube is connected to the engine with a thin rubber hose.

Homemade e boat electric motor.

Many who are interested in outboard electric motors most likely read an article about a home-made motor for a boat based on the GSK-1500 generator. The generator has a mass of about 12 kilograms, is powered by 24 volts, a current of about 40 amperes and a cost in the range of 10 - 12 thousand rubles. The article gives a complex scheme for pairing a generator with a boat propeller. We remind you that such generators were previously used in aviation. According to the data, a fully charged 24-volt battery would be enough for 40 minutes of work before it is discharged. In general, not very optimistic.

Discussing this topic with water motor fishermen, after disputes and searches on the Internet, an interesting idea was born, namely, assembling a boat electric motor on our own, but on a modern base of materials, according to a simplified scheme. As a traction force, the electric motor itself, different engines were considered, which can be purchased, if not in a nearby store, then at least on the same Internet. A car starter, of course, is a powerful unit, but it will drain the battery very quickly. The industrial DC motors we have reviewed are either too weak or too big.

In the end, we settled on a completely acceptable option - an electric winch for ATVs and snowmobiles. They are not as powerful as, for example, automobile ones, but they have good traction due to the gearbox and a relatively small current consumption.

Let's take, for example, uh electric winch for ATV or snowmobile COME-UP 1500. It has a three-stage metal gear for high speed. At a voltage of 12 volts, it has a power of about 300 watts (0.4 hp), a small size and a current consumption of up to 10 amperes.

For comparison, we can say that some factory-made outboard electric motors have slightly worse characteristics.

Another thing is how to dock such a motor with a boat propeller? The simplest thing that can be proposed, without going into mathematical calculations and complex drawings, is a belt drive. For example, an engine mounted on a base and fixed to the transom of a boat with clamps rotates a large diameter pulley. A shaft is welded to the lower end of the deadwood, on which there is a screw with a small diameter pulley. Thus, when the top large pulley is rotated, even at a low speed, the lower pulley will rotate much faster. And since a certain traction force is already incorporated into such electric motors with a gearbox, which the same ATV will easily move, the engine will operate with little or no load to rotate the boat propeller. What will have to be redone in this design of the electric winch is to install a pulley on the electric motor.

Now an equally important detail. Boat motor battery. If you use a battery designed to work with outboard electric motors, then such a battery will last for quite a long time. The advantage of such batteries is that they allow full discharge.

We will be glad if someone will bring such a design to the end and write to us with a detailed photo report.

In order to independently assemble the outboard motor, you need to understand its device. Additionally, it should be borne in mind that a tiller is required to control the model. In this case, it is more advisable to use parts from an old outboard motor. Trays for the engine are selected separately. You should also pay special attention to the fuel system. Some experts are able to fold the outboard motor from a chainsaw or trimmer.

Simple motor device

At the top of any outboard motor is the engine itself. Through the fuel pump, it is connected to the piston system. Additionally, it should be noted that the outboard motor has a special rocker arm. It is necessary in order to ensure the operation of the valves. In this case, much depends on the cubic capacity of the engine. A clamp is located on the pallet in the outboard motor. With its help, it is possible to fix the model on board.

Clamps above the pallet are not always used. In some cases, gearboxes are also installed. Today there are a wide variety of deadwoods. Directly below them is the crankshaft, which is connected to the central rod. Thus, the torque is transferred to the lower gear. Through a special head, the screws are rotated.

chainsaw model

You can make a chainsaw outboard motor, but you need parts from an outdated model. First of all, the engine of the device is removed. It is installed directly on the pallet. In this case, the fuel system for it, you can choose the most common. In this case, the limit frequency parameter will not exceed 1300 rpm. The rocker arms on these boats are suitable with three valves. However, special attention must be paid to the type of convector.

With this part, it will be possible to control the tiller. After fixing the top plate, it is possible to move on to the deadwood. in this case, it is better to choose a durable one. In this case, the central rod must be borrowed from the old outboard motor. At the end of the work, you only need to install the lower gear with screws. An additional pump is required to pump out water.

trimmer motor

Trimmer motors are quite easy to assemble. First of all, experts advise removing the handle. It needs to be replaced with a stock. Next, it is important to make a pallet for the engine. In this case, you can even use a cast-iron stove. The engine must be mounted on it very carefully. The fuel pump for the system can be used conventional. However, it is more expedient to select a durable camshaft, otherwise it will not withstand heavy loads. Deadwood in this case is attached only after fixing the upper gear.

If desired, a thermostat can be installed on outboard motors (homemade). The clamp is mounted after the deadwood is fixed. To prevent the engine gearbox from hanging out, many experts advise using a special rubber gasket. The screws of the model must be fixed on a vertical shaft.

Motoblock model

It is quite difficult to assemble home-made outboard motors from a walk-behind tractor, but it is possible. If we consider electrical modifications, then the starter is removed from the device first. In addition, the motor must be disconnected. If a four-stroke modification is used, then the most common fuel system will do. In this case, it is important to select a high-quality water pump. In turn, deadwood can be taken from an outdated outboard motor. To secure the fuel pump, many use various clamps. The easiest way is considered to be setting it over the carburetor. At the same time, it should not come into contact with the rocker arm.

The crankshaft for outboard motors (homemade) should be mounted above the top gear. At this stage, you need to check the strength of the clamp. The pallet, in turn, should not overlap it. The water pump in this case is installed under the deadwood. In order not to interfere with the operation of the lower rod, many experts advise using special springs. After fixing them, it remains only to fix the screws and the tiller.

Devices with a double-sided handwheel

Making a do-it-yourself outboard motor with a double-sided flywheel is not an easy task. The engine in this case is more appropriate to choose a two-stroke type. In this case, the rocker under it should be designed for three valves. Also, before installation, it is necessary to check the strength of the pushers. They must withstand a maximum pressure of at least 3 bar. In this case, it will be possible to hope for a stable operation of the engine. The pallet in this case must be mounted under the clamp. For convenience, it can be fastened with screws and then use a sealant. After fixing the tiller, the deadwood is connected. The outboard motor propeller protection is installed last.

Models with two-stroke engines

You can do it yourself with a two-stroke one only if you use a crankshaft with a diameter of at least 60 mm. Otherwise, it will not withstand the load. The flywheel in this case, you can pick up the usual. In this case, the fuel pump must withstand a maximum pressure of at least 3 bar. Rocker arms experts advise installing only three valves. The thermostat is mounted on boat motors (homemade) if desired.

Exhaust valves in the system are most often installed aluminum. Cooling devices are available in a variety of today. The simplest option is considered to be water modification. To do this, intakes should be provided in advance in the pallet. Pushers above the engine must be installed last. Deadwood for two-stroke modification is suitable with a 120 mm stem.

Devices with four-stroke engines

You can assemble a homemade outboard motor with a four-stroke engine, but you will have to use parts from another model. In particular, it is necessary to separately select the clamp for the device. You should also pay attention to the fact that the rocker will be required in this case for four valves. In this case, the tank is installed under the fuel system near the pallet.

Deadwoods for the engine are selected, as a rule, for two rods. In this case, the crankshaft must be selected separately. Connectors in such devices are installed quite often. The tiller must be attached directly to the flywheel. It is best to use steel clamps for this. In this case, it is quite difficult to do without welding.

Manual starter modifications

Homemade outboard motors (swamps) with manual starters are quite common. These components are installed near the camshaft. In order to secure them, you must use a rubber gasket. In this case, there must be at least four screws. If we consider four-stroke engines, then there, as a rule, starters are installed of an electronic type. However, for push-pull modifications, manual devices are ideal.

Model with protected gear

Boat motors with a protected gearbox today are quite in demand. In order to assemble them yourself, you need to pick up an engine with a power of at least 3 kW. The starter in this case is suitable for manual type. First of all, a clamp for the engine is cut out. Only after that you can proceed with the installation of the fuel system. The thermostat, if desired, is installed on the rocker.

The next step is to attach the gearbox. To prevent the rocker from twitching during operation, a gasket can be placed under it. Pushers are installed on the pallet, and for this you will need to use a welding machine. In this case, it is important to fasten the upper stem under the clamp. To prevent pressure from deforming the pallet, many experts advise installing additional supports.

Devices with anti-cavitation plate

Outboard motors with the help of an anti-cavitation plate are controlled quite comfortably. In this case, it is necessary to start work on assembling the device by fixing the engine. Only after that the clamps are welded. Screws can be used to secure the fuel pump. In this case, it is not necessary to install a gasket. Special attention should be paid to the fuel system. It should be attached next to the water piston. The anti-cavitation plate is fixed near the connector. However, it should not come into contact with the pallet. As a result, it remains only to install the deadwood.

Motor with gearbox

Outboard motors with gearboxes are quite difficult to assemble. In this case, the connector must be selected high-quality. In turn, the engine can be used four-stroke. The pushers for the system are installed quite wide. The gearbox should be mounted at the upper flange. In order to avoid short circuits, all wiring must be carefully hidden. Additionally, you should take care of a good water pump. To block the upper rod from the carburetor, you can use a sealant.

Model with reverse lock

In order to assemble a motor with a reverse lock, it is first necessary to fix the motor as standard. After that, the tiller is connected to the plate. The fuel system can only be installed after the rocker arm. In order not to pinch the carburetor, many advise using gaskets.

The reverse lock should be attached directly under the clamp. For this purpose, it is necessary to use a welding machine. After that, it remains only to fix the deadwood. If the outboard motor is installed with a gearbox, then the latch can be located directly in it. However, this is quite difficult to do due to the fact that you have to cut the block body.