2. PRODUCT EXPLANATION 2.4 Major Service of Parts Name of part
Function
Fuel filter
Removes dirt and water from fuel. Drain the filter periodically. The element (filter) should be changed. See maintenance section 4.3.5
Fuel feed pump
Pumps fuel from tank to the fuel injection pump.
Priming lever
Moving the priming lever up and down feeds the fuel. The priming lever is used to bleed air from the fuel system after running out of fuel.
Filler port (engine) Filler port for engine lubricating oil. Filler port (marine gear)
Filler port for marine gear lubricating oil.
Lubricating oil filter
Filters fine metal fragments and carbon from the lubricating oil. Filtered lubricating oil is distributed to the engine's moving parts.
Cooling System
There are two cooling systems: fresh water and seawater. The engine’s combustion heat is cooled by the fresh water/coolant in a closed circuit. The fresh water is cooled by seawater using heat exchanger. The seawater also cools the engine- and gear-oil (and depending on the model also intake air) through coolers in an open circuit.
Fresh water pump
The centrifugal water pump circulates fresh cooling water inside the engine. The fresh water pump is driven by the V-belt.
Seawater pump
Pumps seawater from outside the vessel to the engine by passing through the engine’s coolers. The seawater pump is belt driven and has a replaceable rubber impeller.
Fresh water/coolant filler cap
The filler cap on the coolant tank covers the water supply port. The cap has a pressure regulating valve. When the cooling water temperature rises the pressure rises inside the fresh water system.
Coolant recovery tank
The pressure regulating valve releases vapour and hot water overflows to the coolant recovery tank When the engine stops and cooling water cools, the pressure in the cooling water tank also drops very low. The filler cap valve then opens to send water back from the coolant recovery tank. This minimizes cooling water consumption. Fresh water/coolant level can easily be checked and refilled in this tank.
Intake silencer
The intake silencer guards against dirt in the air and reduces the noise of air intake.
Nameplates
Nameplates are provided on the engine and the marine gear and have the model, serial number and other data.
Starter
Starter motor for the engine. Powered by the battery.
Alternator
Rotated by belt drive, generates electricity and charges the battery.
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