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Outboard motors for boats made of PVC: what are and how to choose?

After acquiring a simple PVC boat, the lucky owners begin to think about installing a motor on their vehicle, since it is not always a desire to go oars on relatively long distances. Today, most models of inflatable boats have the ability to install an engine. We will analyze in the article which motors are desirable for installation on PVC boats, their types and features.


To date, outboard engines for PVC inflatable boats are produced according to the scheme proposed by Ol Evindur in 1906. In this scheme, all nodes are located vertically.

One of the features of the device of such engines is the presence or absence of a reverse and a clutch:

  • on motors up to 5 liters. with. most often the gearbox does not have a reverse and a clutch;
  • on engines from 5 to 12 liters. with. without fail the clutch is present, and the reverse mechanism may be absent;
  • on engines over 12 liters. with. the presence of reverse and clutch is mandatory.

Most often, the reverse and the clutch are combined into one unit, called the reverse clutch.

The propeller is usually connected to the shaft of the gearbox through a node with limited strength, acting as a kind of fuse. Thanks to him, in the event of a screw hitting an obstacle, a serious breakdown will not occur. After the breakdown of this element, it will have to be replaced with a new one, such a procedure is simple and inexpensive. As a fuse, as a rule, the middle key or middle pin acts.

The main advantages of the outboard motor are its small size, not occupying the useful space of the boat itself, ease of removal and installation, light weight.

Previously, 2-stroke outboard motors, which were chosen for their unpretentiousness, high power density, simplicity of design and low weight, were very popular. Gradually, their shortcomings, with the improvement of 4-stroke engines, pushed 2-stroke engines to the background. Due to its efficiency, high resource, ease of use, consumers are interested in and a desire to switch to 4-stroke equipment.


There are many options and varieties of boat motors. Consider their most popular types.

Screw internal combustion engine

Probably the most popular and common engine on any boat. It consists of the internal combustion engine and gearbox, which transmits torque to the screw.

These engines are divided into 2 types:

  • 2-stroke
  • 4-stroke.

If you do not go into a large number of technical details of these engines, then the most necessary thing to know before buying a boat engine is that the 4-stroke engine is refueled with ordinary gasoline, and the 2-stroke engine is filled with gasoline mixed with special engine oil. It has the usual manual start, and the fuel comes through a hose from an external gas tank located in the boat and occupying some space in it.

Electric motor

High environmental requirements and the ban on the use of internal combustion engines in some reservoirs have led to the need to develop electric motors powered by batteries. These engines can be attributed to a new look, just starting to gain its popularity.

The electric motor has a number of advantages in comparison with its competitors of internal combustion, namely:

  • very quiet operation of the engine, which will allow you to sneak up to production as close as possible without frightening it, and also allows the owner of such a motor to listen to the nature and bursts of water, and not the roar of the engine;
  • lack of harmful exhausts that will allow to protect a reservoir;
  • maintaining a stable speed when trolling fishing, on rivers with a weak current or lakes this will allow spinningists to explore their places of interest;
  • light weight will allow you to transfer and install motors on a small boat with a small load;
  • greater maneuverability will allow you to go where you have to work with oars;
  • there is no need for the costs of maintenance and engine conservation for the winter period;
  • compact dimensions;
  • lack of operating costs (oil, fuel, candles);
  • low cost of the kit, sometimes the difference may be 50%.

But it will not do without flaws:

  • it will not be possible to accelerate more than 10 km / h;
  • lack of ability to move on rivers with fast currents, with strong winds;
  • not suitable for long-distance trips;
  • to charge a dead battery you will need an electric network;
  • the power source weighs 2-3 times more than the motor itself and takes place in the boat.

The described engines are used on small boats for trips on lakes and in places without currents, sometimes you can see them in the role of an auxiliary engine.

Water jets

Most of the water-motorists and fishermen who have mastered the shallow rivers of Russia use small boats with outboard motors equipped with a water jet nozzle, instead of the gearbox with a propeller familiar to everyone. An important feature of the jet nozzle is the need for a powerful motor from 10 liters. with. Water-jet engines are indispensable in shallow water, where the use of a conventional screw device is not possible.

Manufacturers Rating

In the field of water transport it is considered that the best manufacturers of engines for boats are These are Japanese and American companies. Engines of well-known manufacturers are reliable and last a very long time, they also have excellent characteristics and do not experience problems with spare parts for repair and maintenance. Good motors have a high price tag, so cheaper Chinese options are increasingly appearing on the market. Reviews about them can be very different depending on the manufacturer.

Engines of the following brands are suitable for inflatable boats made of PVC:

  • Honda
  • Yamaha
  • Suzuki
  • Tohatsu;
  • Hidea;
  • Mercury
  • Parsun;
  • HDX.

How to choose?

Speaking of rubber and PVC watercraft, it is necessary to select a motor for them more carefully than for "hard" boats. An important factor when choosing a power unit will be the technical characteristics indicated in the passport to the boat itself, namely:

  • availability of space for mounting the engine (transom);
  • maximum allowable engine power;
  • boat carrying capacity.

This is necessary for the following reasons:

  • installing the power unit on the boat, we increase the weight of the entire structure, thereby reducing the mass of the transported cargo;
  • if there is no transom on the vessel, it will have to be purchased separately, and this is extra weight and an additional power limit, since only the weakest motors are used with mounted transoms;
  • it is impossible to install gasoline and electric engines of higher power on the boat than permissible according to the passport, since this can lead to sad consequences from a lack of power to move a loaded vessel with a weak engine to a coup with an excess of power.

It is necessary to approach the issue of buying a motor for your boat thoroughly, having understood the main thing - there is no ideal motor suitable for all imaginable needs. Each of the engines presented is intended for specific purposes and operating conditions and the terrain in which it will be used.

We must not forget about the dimensions and carrying capacity of the boat for which this motor is purchased - the motor must match the ship. The consultants in specialized stores will help you choose the engine you need based on the parameters of the vessel. For consultations, it is better to choose well-known outlets with world brands, this is due to the fact that only highly qualified specialists work there.

Speed ​​and power should have a small margin in case of towing another boat, moving on water in a strong wind and in strong currents. There should not be an excess in power either.

By purchasing an engine for a long time, it is better to choose a unit from a well-known manufacturer with a worldwide reputation, in this case you will receive a longer guarantee (up to 5 years), a large number of service centers.

How to install?

Installing a motor on a boat does not take much effort and time. Small units can be installed independently without helpers. Correctly put the engine you will help the instruction manual for the motor, which comes with the unit itself.

The engine must be installed strictly in the middle of the transom. Mount the motor and firmly tighten the locking flaps on the unit bracket. Next, connect the fuel hose and tightly fix it with a hose clamp. The use of leaky and ruined hoses is unacceptable.

In the bracket of the motor mounting there are holes that are fixed with a pin - this is necessary to adjust the angle of the device relative to the boat. If you install a motor with a too wide angle (over 15 degrees), then the bow of the ship will rise much, which will affect the handling of the boat for the worse.

When installing a motor with a negative angle, the bow of the boat will lower below, which will lead to a loss of power and poor handling.

See how to choose the right outboard motor in the next video.

Watch the video: Boat: Best Inflatable Boat 2019 Buying Guide (April 2020).


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