How To Tell A 2 Stroke From A 4 Stroke Outboard

Thirty years ago, American manufacturers dominated the outboard motor market. Names like Mercury, Evinrude, Johnson, and Chrysler staged spirited campaigns against one another in order to come up with outboard engines that were better and more innovative.

Outboard engines come in two main categories: two stroke and four stroke. Both types have their advantages and disadvantages, and the type you pick will depend on the intended use.

How to tell a 2 stroke from a 4 stroke outboard would be to classify it according to environmental safety, power, weight and price.

How To Tell A 2 Stroke From 4 Stroke Outboard

The terms two stroke and four stroke refer to the number of occasions the piston moves during one firing cycle of an engine.

Power

  • Mercury 2.5hp
  • Mariner 2.5hp
  • Mercury 3.5hp
  • Tohatsu 3.5hp
  • Honda 2.3hp
  • Suzuki 2.5hp
  • Yamaha 2.5hp
  • Parsun 2.6hp

All these outboards are 4 stroke engines. This is due to a European Union directive that prevents 2 strokes from being sold in the E.U.

These outboards will provide a fairly wide range of engines available on the market for powering dinghies.

4-stroke engines are generally smoother, less noisy and more cost-effective.

Weightier with less acceleration, they are normally chosen for calmer waters. With less pollution and smoke, they are also better for the environment.

2-stroke engines are lighter and faster, allowing for more top end speed and acceleration.

Environmental Friendliness

As already mentioned, 4 stroke engines are generally smoother, less noisy and more cost-effective.

2 stroke outboard engines are not as environmentally friendly, and produce more pollution and smoke.

Weight Of Outboard Engine

Four stroke engines are heavier than older 2 strokes because of the powerhead.

The Mercury, Yamaha, Mariner, Tohatsu, and Parsun weigh about 38 - 41 lbs (18 kg). However, the Suzuki 2.5hp and Honda 2.3hp weigh a lot less at 28 lbs (12.5 kg).

Price

It may never be easy to compare the prices of these outboard motors because of the ever-available and constantly changing market forces that always result in price movements.

However, the Parsun was the cheapest, and it is virtually identical to the engine in the Yamaha 2.5hp.

Verdict

2-Stroke engines are lighter and faster, allowing for more top end speed and acceleration. They are also more affordable and have a higher resale value.

Because 2-Stroke engines have been around for almost 80 years, necessary parts are more readily available, making repair easier. The design on these engines is less complex than that of a 4 stroke engine, which allows for fewer problems to arise.

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