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Diesel and gas engines, cooling systems, fuel systems, transmissions, and winterizing.
24 articles
The air filter is a canister mounted on the engine that filters incoming air to remove debris before it enters the intake. Both diesel a…
The alternator is an engine-driven generator that converts mechanical energy into electrical power to charge your batteries and supply on…
These are the core internal components of your engine that convert fuel combustion into mechanical power. Pistons move up and down inside…
The coolant system is a closed-loop circuit that circulates a mixture of antifreeze and water through the engine block, cylinder head, an…
The engine block is the main body of the engine, usually made from cast iron or aluminum. It contains the cylinders, crankshaft and other…
The engine instrument panel displays critical information such as oil pressure, coolant temperature, tachometer (RPM), voltmeter and ofte…
Engine oil is a specially-formulated lubricant that coats moving parts inside the engine such as rods, bearings and cylinders, reducing f…
Engine room blowers are electric fans designed to quickly remove air from the engine compartment, while ventilation fans provide a contin…
The marine exhaust system safely removes hot engine gases and cooling water from the engine and heat exchanger redirecting them outside t…
The coolant reservoir, also called the expansion tank, is a container mounted near the engine, often high up in the engine bay. Expansion…
Fuel filters remove contaminants and water from fuel before it reaches the engine. Most marine engines have both a primary filter near th…
Fuel injectors are nozzles that spray fuel into the engine cylinders at exactly the right time and volume. Diesel engines use a high-pres…
A fuel polisher is a dedicated pump-and-filter system that circulates fuel from the tank through fine filters and a water separator, remo…
Most boats have two distinct types of fuel pumps. The primary or lift pump is an essential engine component that draws fuel from the tank…
The fuel tank is a sealed container made of aluminum, stainless steel or fiberglass that stores diesel or gasoline. Fuel lines carry fuel…
Glow plugs are small, pencil-shaped heaters in each cylinder of a diesel engine. They heat the combustion chamber to help the engine star…
A heat exchanger is a device that cools the engine by transferring heat from the engine’s freshwater coolant to seawater without mixing t…
The marine exhaust system safely removes hot engine exhaust gases and cooling water from engine to outside boat, consisting of water-cool…
The oil pump is an internal engine component, usually a gear or rotor type, driven by the crankshaft. It pressurizes oil and forces it th…
The raw water pump is a belt-driven or gear-driven pump mounted on the engine. It draws seawater through a through-hull fitting and seaco…
The raw water strainer is a clear or bronze housing with a removable basket filter located between the through-hull intake and the engine…
The starter motor is an electric motor mounted on the engine that turns the engine over to start it. When you turn the key, a small switc…
The thermostat is a temperature-controlled valve in the engine’s cooling system, typically located at the outlet of the engine block. Ins…
Throttle and shift controls are the levers at the helm that control engine speed and transmission direction. They connect to the engine a…