Craftsman CM4.33 - Page 36

Title part xxx
Subtitle part xxx
36
craftsman marine diesel engines CM4.33 / cm4.42
14 Problems and solutions
Problem Probable cause Solution
1.
Starter motor does neither
rotate nor engage
• Defective or discharged battery
• Burnt fuse
• Loose or corroded connections in the starter circuit
• Defective starter switch or relay
• Defective starter motor or pinion does not engage
• Starter relay not activated owing to insufcient voltage, on account of a
too long cable from engine to instrument panel
• Jammed components
• Check battery/charge or replace and check
alternator for proper functioning
• Replace
• Clean and tighten the connections
• Replace defective component
• Replace starter motor Fit an auxiliary starter
relay
•Repair
2.
Starter motor turns round,
but engine does not res-
pond
• Fuel valve closed
• Empty fuel tank
• Air in fuel system
• Fuel lter clogged up by water or dirt
• Leak in fuel supply or fuel injection line(s)
• Defective injector / injection pump
• Breather line of fuel tank clogged up
• Clogging in exhaust line
• Electrical fuel lift pump defective
• Dirt in press or suction valves of the electric fuel lift pump
• Filter of electrical fuel lift pump is clogged up.
• Open
• Fill
• Check /breathe
• Check/replace
• Check/replace
• Check and replace if necessary
• Check/clean
• Check
• Check/clean
• Replace. Moreover, position a water separator/
fuel lter into the fuel line between tank and
engine.
• Check/clean
3.
Starter motor turns round,
but engine does not res-
pond; smoke comes from
exhaust
• Air in the fuel system
• Defective injector/injection pump
• Setting of stop valve incorrect
• Defective glow plugs
• Incorrect valve tolerance
• After engine overhaul, incorrect injection moment
• Insufcient combustion air
• Poor fuel quality or polluted fuel
• Incorrect SAE-specication or quality of lubricant
• Check / bleed the system
• Check / replace if necessary
• Check / readjust
• Check / replace
• Read just
• Check / readjust
• Check air intaker and remove blockage
• Check fuel quality. Drain fuel tank and rinse it
well. Fill with good quality fuel
• Replace by good quality lubrication oil