
TROUBLESHOOTING
BY Series Operation Manual 99
Vibration - Drive Disengaged
Vibration - Drive Engaged
Blue Smoke
Worn piston rings / cylinders
See your authorized Yanmar dealer
or distributor
Oil leak in turbocharger (oil
present in intake manifold)
Damaged piston cooling nozzles
Black Smoke Under Load
Clogged intake air filter Replace or clean as necessary
Incorrect valve timing
See your authorized Yanmar dealer
or distributor
Defective (leaking) fuel injector
Low charge air pressure
Clean or replace clogged air filter
See your authorized Yanmar dealer
or distributor
Excessive exhaust back pressure
See your authorized Yanmar dealer
or distributor
Plugged intake port(s)
See your authorized Yanmar dealer
or distributor
Problem / Symptom Cause Action
Problem / Symptom Cause Action
Rough at All Engine Speeds
Air in fuel system Bleed fuel system
Faulty fuel injector
See your authorized Yanmar
dealer or distributor
Leaking cylinder head gasket
Damaged intake or exhaust valves
Incorrect injection pressure
Problem / Symptom Cause Action
Rough at All Speeds
Engine and propeller shaft
misaligned
See your authorized Yanmar dealer
or distributorLeaking cylinder head gasket
Bent propeller shaft
Rough at Higher Speeds
Bent propeller
See your authorized Yanmar dealer
or distributor
Slipping clutch / clutch dog
Incorrect injection pressure
Injection timing is incorrect
Commenti su questo manuale