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PARTS DESCRIPTIONS
PARTS AND TOOLS
RAW WATER PUMP
SET THE IDLE RPM
TACHOMETER
TRANSMISSION OIL
' V ' BELT ADJUSTMENT
VIBRATION
WATER IN THE ENGINE
WATER IN THE FUEL
WINTERIZE

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Yanmar Marine Pleasure Boat Engine Help

Engine Parts Descriptions

The photos below contain descriptions of 3JH3E engine parts and are common to most engines. They are intended to help us both talk about the same thing. They are 1280x960 pixel resolution so they're ' huge ' and will open in a separate window. If you have a deadly slow internet connection you may want to give these a miss.

Photo of 3JH3E top side with links. Photo of 3JH3E port side with links..

Parts Descriptions

AThermostat housing
BFuel filter with lift pump on top
CHigh pressure injector pipes come from the fuel injection pump and go to the injectors
DLow pressure fuel leak off pipes, returning unused fuel to the fuel system
EElectric stop solenoid (option)
FRocker cover (remove this to set the valve clearances)
GData plate with model name and engine serial number
HCrankcase breather filter cover. (Doesn't usually need servicing)
IHeat exchanger core end caps. Remove and clean inside when temperature is
consistently higher than normal.
JOil filler cap
KHeat exchanger cap (Radiator cap)
Lto overflow bottle
MHigh temperature alarm switch
N3/8 PT (metric or British) plug for hot water cylinder connection
Oalternator belt adjusting support bar
Pfresh water pump
Qalternator
Rmixing elbow (exhaust hose connects here)
Sdrain cock for coolant from heat exchanger
Tdrain cock for raw water
Utacho sensor
Vstarter motor
Wstarter retaining bolt. (the negative cable from the battery usually goes here)
Xraw water pump
Ystarter relay

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