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Section 02
TROUBLESHOOTING
Sub-Section 01
(TROUBLESHOOTING CHART)
02-01-3
ENGINE DETONATION OR PINGING
ENGINE LACKS ACCELERATION OR POWER
ENGINE RUNS TOO FAST
ABNORMAL NOISE FROM PROPULSION SYSTEM
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
Ignition
• Timing too far advanced
• Check/reset
• Spark plug heat range too high
• Check/change to correct range
• Defective ignition module
• Check/replace, refer to section 07-02
Engine temperature
• Engine overheats
• Check, refer to engine overheats
• Fuel of poor quality
• Use good quality fuel
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
• Weak spark
• Check/replace, refer to section 07-02
• Carburetion, jetting too rich/lean
• Check/adjust, refer to section 05-04
• Throttle does not open fully
• Check/readjust, refer to section 05-04
• Low compression
• Check/repair, refer to section 03-05
• Exhaust system restriction
• Check/clean
• Water in fuel or oil
• Check/siphon/replace
• Debris in carburetor needle valve
• Check/clean, refer to section 05-04
• Impeller leading edge damaged
• Check/replace, refer to section 08-02
• Twisted crankshaft
• Check, refer to section 03-06
Engine revs lower than its
maximum operational RPM
(787 engine)
• RAVE valve does not open
• Check, refer to section 03-05
Peak performance is delayed
until higher RPM range is
reached (787 engine)
• RAVE valve is stuck opened
• Check, refer to section 03-05
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
Engine RPM too high
• Faulty rev limiter
• Check, refer to section 07-02
• Improper impeller pitch (too low)
• Check/replace, refer to section 08-02
Jet pump cavitation
• Damaged leading or trailing edge of
impeller
• Check/replace
NOTE:
Leading edge damage contributes to
poor performance from start. Trailing edge
damage contributes to poor top performance
and stator vanes erosion.
• Sealing of ride shoe or jet pump sup-
port/jet pump
• Check/reseal, refer to section 08-02
or 11-02
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
• Weeds/debris caught in intake grate or
impeller
• Check/clean
• Low oil level in pump housing
• Check/troubleshoot source of leak/refill
supply, refer to section 08-02
• Worn anti-knocking system
• Check/replace pusher in cover, refer to
section 08-02
• Damaged or bent drive shaft
• Check/replace, refer to section 08-03
• Broken motor mounts
• Check/replace, refer to section 03-03
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Содержание 1997 GSI
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