2. DIESEL ENGINE
(1) Starting deficiency:
(A) Due to deficient compression:
Intake or exhaust valve defective
No compression
available.
Decompression adjustment deficient.
Nozzle seat loose.
Mating surface between cylinder and cylinder head deficient.
Piston ring worn.
Cylinder worn.
Valve seat contact deficient.
Nearly no or very
little Compression
available:
B) Due to improper fuel injection in combustion chamber:
Aeration in piping (Particularly occurs when fuel tank is emptied.)
Fuel strainer passage clogged or strainer clogged.
Fuel strainer cock closed.
Air breather hole in tank cap clogged.
Very little or no fuel
flow:
Nozzle needle stuck.
Nozzle hole clogged.
Injection pump barrel and plunger stuck.
Fuel injection not available
in combustion chamber:
Fuel not available in the tank.
Water or dust entered.
(C) Does not start even combustion and compression are normal:
Aeration in piping.
Engine oil viscosity too high or highly contaminated.
Improper starting procedure.
Does not reach starting rpm:
(D) Poor Battery
(2) Insufficient output and deficient operation:
Compression insufficient.
See (“Due to deficient compression” above.)
Nozzle clogged
Injection timing inappropriate.
Smoke set improper.
Overloading
Carbon deposited in fuel chamber or exhaust hole.
Dirty cooling fins.
Water entered fuel filter.
Engine overheated
and dark exhaust
Fly plate and sliding parts worn or deficient in actuation
Deficient governor spring.
Deficient contact between governor and sleeve.
RPM fluctuates:
Overloading.
Exhaust hole or muffler clogged.
Valve open/close timing inappropriate.
Engine speed does
not rise:
27
Summary of Contents for Mikasa MVH120
Page 13: ...10 ...
