Section 02 TROUBLESHOOTING
Subsection 01 (TROUBLESHOOTING CHART)
TROUBLESHOOTING CHART
The following is provided to help in diagnosing the probable source of troubles. It is a guideline and
should not be assumed to show all causes for all problems.
NOTE: On fuel injection models, always check for fault codes. If a fault code is detected, service the
fault code and recheck operating conditions. Refer to DIAGNOSTIC PROCEDURES in ENGINE MAN-
AGEMENT section.
ENGINE WILL NOT START
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Wrong safety lanyard Use one that has been programmed
DESS operation non functional
If 2 short beeps are not heard when
installing safety lanyard, refer to ENGINE
MANAGEMENT
Safety lanyard switch faulty or
disconnected or harness damaged
Replace
Burnt fuse: battery, starting system.
Also fuel pump
Check wiring then replace fuse
Starting system fuse keeps on burning Check wiring, starting system solenoid
and MPEM
Discharged or disconnected battery
Check/recharge
Defective or disconnected start/stop
switch
Check, refer to STARTING SYSTEM
Battery connections
Check/clean/tighten
Poor/bad or corroded ground contacts
(engine, starter etc.)
Check/clean/repair
Water/fuel hydro-lock
Check, refer to MAINTENANCE
Starter malfunction Check, refer to ELECTRICAL SYSTEM
Starter solenoid Check, refer to ELECTRICAL SYSTEM
Obstructed starter drive gear assembly Check/repair, refer to PTO
HOUSING/MAGNETO in the
1503
4-TEC ENGINE SHOP MANUAL
Seized or obstructed engine
Check/repair, refer to the 1503 4-TEC
ENGINE SHOP MANUAL
Seized or obstructed supercharger
(if so equipped)
Check/repair, refer to the 1503 4-TEC
ENGINE SHOP MANUAL
Seized jet pump Check, refer to PROPULSION SYSTEM
Engine does not turn over
Faulty sensor, ECM or MPEM Check fault codes, refer to ENGINE
MANAGEMENT
smr2005-006 15
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