Craftsman Marine CM4.65, Manual

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37 Crafted with CRAFTSMAN MARINE
Problems and solutions
Problem Solution Probable cause
10. Excessive fuel consumption of
engine
• Poor or polluted fuel quality
• Defective injector / injection pump
• Incorrect injection moment
• Excessive wear and tear of cylinder / piston
• Insufficient supply of combustion air • Check fuel quality. Drain fuel tank and rinse it well. Fill
with good quality fuel
• Check and replace if necessary
• Check / adjust
• Check compression, overhaul engine if necessary
• Check the air intake and the ventilation openings in the
engine room
11. Blue smoke coming out of the
exhaust (when idling) • Oil level too high
• Excessive inclination angle of the engine
• Leaking oil seal of the turbo compressor
• Lower oil level
• Check / adjust alignment of engine
• Check / replace
12. Black smoke coming out of the
exhaust (under load)
• Defecte turbocompressor
• Insuffient supply of combustion air
• Leakage in air intake manifold
• Defective injector / injection pump
• Incorrect injection moment
• Incorrect valve clearance
• Excessive wear and tear of cylinder / piston
• Engine overheated, does not reach maximum rpm • Check air intake as well as the ventilation openings in
the engine room
• Check/ replace
• Check/ replace
• Check and replace when necessary
• Check/readjust
• Readjust
• Check compression, overhaul the engine if needed
• Check the dimensions (diameter and pitch) of the
propeller and replace the propeller if necessary.
13. Engine produces white smoke
from the exhaust (at full load) • Air inclusion in the fuel system
• Defective injector / injection pump
• Water in the fuel system
• Incorrect valve clearance
• Incorrect injection moment
• Poor fuel quality or polluted fuel
• Condensation of vapour in the exhaust system, on
account of very low ambient temperature
• Check / bleed the system
• Check / replace if necessary
• Check / clean water separator / fuel filter
• Check / adjust
• Check / adjust
• Check fuel quality. Drain fuel tank and rinse it well. Fill
with good quality fuel
• No problem, no danger
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