Types of Fishing Boat Engines


When selecting the suitable boat engine for your vessel, consider the size and weight of the boat and bear in mind that weight includes your guests, fuel and equipment. An excellent general rule is to come as close as possible to the maximum horsepower that your boat is ranked for.


When looking at gasoline engines (outboard, stern drive or inboard), there are 3 distinct types of fuel delivery systems on the market. Each fuel delivery system is distinct, and there are advantages to each system.


  • Low emissions
  • Exceptional fuel economy
  • Instant turn-key starting
  • Smooth idling
  • Decreased vapor lock in warmer environments
  • Instantly gets used to elevation, air and water temperatures
  • Superior throttle reaction and power
  • Self-diagnosis systems offered
  • Sealed fuel system (assists to get rid of fuel oxidation).


  • Uniform air and fuel distribution.
  • Superior throttle reaction and power.
  • Normally exceptional fuel economy.
  • Cold engine start.
  • Self-diagnosing systems schedule.
  • Low emissions (especially four-stroke).


  • Least expensive preliminary cost.
  • Simple style.
  • Higher emissions than an EFI or DFI system.
  • Poor fuel economy when compared with an EFI or DFI system.


A boat engine is one of the most necessary parts of a vessel. For this reason, it is important to understand the different choices readily available and which boat engine will fit your fishing requires. The two main elements to think about are the weight and horse power of your engine. These are the primary types of engines offered.


Diesel motor depend on compression to power the engine. Their style is similar to a conventional gas engine, with crankshafts and cylinders and pistons; nevertheless, the fuel systems on a diesel motor are totally various and more intricate.

Diesel engines range in size and horse power. While they’re widely used in other parts of the world, in the United States, they’re usually discovered in boats larger than 35 feet. The main reason diesel motor are not used in smaller sized boats is weight. In basic, a diesel engine weighs more than a gas engine. However, they are used in bigger vessels due to the fact that of their ability to produce torque.

  • No carbon monoxide to stress over in cabins or on the back of boats.
  • Excellent torque.
  • Long life span.
  • Low running costs.
  • Typically perform at lower RPM than standard gas engines.
  • Non-explosive fuel.


These boat engines are customized for maritime use. Gas inboard engines vary from 90 horsepower to over 1000 horsepower per engine and are used in a variety of boats, from tow sport boats to big cruisers.

In an inboard engine setup, the engine sits amidships, with a drive running through the bottom of the boat to a propeller, and a separate rudder used for steering. A transmission is typically used to transfer power from the engine to the prop. Exhaust is passed through the stern of the boat. Inboards are common for tow sports such as waterskiing, wake boarding as they enable the propeller to be brought forward of the back of the boat, offering area for platforms to help skiers entering and exiting the boat.

  • Basic drive system can decrease maintenance.
  • No way to trim prop.
  • Low running costs.
  • Peaceful and out of the method.


An outboard is a portable, self-contained system consisting of an engine, gear case and prop, which is connected to the transom of a boat.

A growing number of outboard engines have a four-stroke style, but many are still standard two-stroke engines that burn oil as a lubricant together with the fuel. New innovation two-stroke outboards are direct-injection engines and burn more than 75% cleaner than conventional two-stroke outboards.

Steering of boats with outboards is managed by a tiller or steering wheel that rotates the entire engine to direct prop thrust. Outboards have more power per pound of weight than inboard engines.


An inboard is a four-stroke automobile engine adapted for marine use. It is installed inside the hull or in front of the.

The engine turns a driveshaft that runs through the bottom of the hull and is attached to a propeller at the other end.

Steering of the majority of inboard vessels (except PWCs and jet-drive boats) is managed by a rudder behind the propeller.


Stern drives are known also as inboard/outboards (I/Os) due to the fact that they integrate functions discovered on both inboard and outboard engines. Stern drive engines are four-stroke vehicle engines adjusted for marine use and are mounted inside the boat.

A stern drive engine is connected through the transom to a drive system (also called an outdrive) that is basically the lower system of an outboard. The engine turns a driveshaft that is connected to a propeller at the other end.

Steering of stern drive boats is controlled by the outdrive, which rotates like an outboard engine to direct prop thrust. Stern drives have quieter and more fuel-efficient engines.


Jet propulsion systems have the benefit of having no prop, which can be dangerous to individuals in the water and to marine life.

They are typically inboard engines that take in water that flows through a pump powered by an impeller. The water is then discharged at high pressure through a nozzle that propels the boat forward.The nozzle swivels to offer steering for the boat. Most individual boat use jet drives.

When power is not being used, a jet-driven vessel loses its steering since it is the stream of water that guides the boat. Keep hands, feet and hair away from the pump intake and do not operate in shallow water.