RDG603A26
– Issue 11
Page 29 of 97
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Connect fuel feed return hoses from engine to main supply and return lines to main
fuel tank, ensuring they are connected the correct way around.
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Connect the inlet to the electric fuel pump inlet hose.
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The engine hoses are supplied with 3/8
” (10mm) OD metal hosetails and should be
securely fitted to the main supply and return pipes with compression fittings.
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The engine hoses should have sufficient slack to absorb engine movement without
placing strain on the hoses and be securely clipped to prevent accidental damage and
chafing.
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Initially fill the fuel system by loosening the bleed screw on the top of the primary fuel
filter / water trap. Turn on the ignition to operate the electric fuel pump. Close the bleed
screw when fuel begins to flow clearly (no bubbles). The rest of the process is done
automatically by the engine. It is rarely necessary to bleed the injection pump or
injectors upon installation as the engine will already have fuel in it from the engine run
in and test procedure.
15. Coolant
WARNING:
SCALD HAZARD!
NEVER REMOVE THE COOLANT BOTTLE CAP IF THE ENGINE IS
HOT. STEAM AND HOT COOLANT WILL SPURT OUT AND CAUSE INJURY. TIGHTEN
THE CAP SECURELY AFTER BEING REMOVED. STEAM CAN SPURT OUT DURING
ENGINE OPERATION IF THE CAP IS LOOSE.
WARNING:
BURN HAZARD!
WAIT UNTIL THE ENGINE COOLS BEFORE YOU DRAIN THE
ENGINE COOLANT. HOT ENGINE COOLANT MAY SPLASH AND BURN YOU.
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Yanmar recommend a coolant mix of 50% clean tap water and 50% antifreeze.
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Open the calorifier taps (if fitted) to fill the calorifier system and displace air.
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To fill the cooling system for the first time, fill the boat skin via the inlet hose connection
or filler plug if fitted.
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Fill the engine through the white plastic expansion tank.
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Bleed skin tank.
