IRREGULAR ENGINE OPERATION
Fault Location
;fJIIIRI""'"~l. ENGINEFAILSTOSTART
a. Governor control not full open.
b. Crankcing speed too low.
c. Dry cylinder walIs. Lubricate with 4-5 shots of lubricating oil into each cylinder
using squirter cao through plug holes.
C d. Water in fuel.
e. Fault injection. Check nozzIes.
(';'(3Nt--ltl
2\LACM>F COMPRESSION
a. Check correct valve clearances (0.3 mm, page 40).
f$~""T I
b. Valve sticking. Check valve movement by hand. If necessary squirt! fuel oil
through springs to lubricate valve sterns while pressing down by hand.
c. Start cartridlZe residue on valve seating. Listen for leakage while turning engine
over by h--;;nd: '» iOAfr.;'F
/ A/P"'~;"'.F4'-e.çAl
3. ENGINE HARD TOLCRANK
a. Lubricating oil too thick.
b. Bent propeller shaft. Check alignment at flange coupling (page 49).
"'.s""-1f
4. LACK OF POWER
a. Blocked fuel filter. Renew filter element (page 24).
b. Air in fuel system. '-
c. Dirt in injector nozzIes (page 26).
d. Blocked air filter. I _A'/'__~
e. Outch slipping (page 39). ~()f'~ .
f. Incorrect valve clearances (page 40).
g. Blocked exhaust pipe. Collapsed rubber exhaust hose (kinking or over-
heating).
5. ENGINE STOPS
a. Fuel starvation. Fuel cock closed.
b. Air or water in fuel system.
c. Injector pipe leak.
d. Too little lubricating oil. Top up. Check compression after allowing to cool until
easy to turn over. Re-start and increase load slowly.
6. SMOKY EXHAUST
a. Blocked nozzIes (page 26).
b. Worn pistonrings and poor compression.
c. Valve leakage. Oean and re-grind.
d. Air intake blocked.
50
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