Trouble Check Chart
Outboard Will Not Start
T-359
T
Outboard Will Not Start
OBSERVATION POSSIBLE CAUSE PROCEDURE
Outboard turns over Stop circuit grounded Check wiring and emergency stop switch. Check
the safety lanyard is installed and stop circuit is
not grounded.
In gear–Tiller models Make sure outboard is in neutral
No Fuel Check for fuel in fuel tank
Water in fuel Check fuel filter, sample fuel from fuel return man-
ifold.
Contaminated or poor fuel
quality
Check or replace fuel supply
Fuel supply restricted Check primer, anti-siphon valve, and fuel pick-up.
Use primer to fill vapor separator with fuel.
Air in fuel system Check for air in fuel supply manifold, refer to Fuel
System (vapor separator venting and fuel supply)
Low or no fuel pressure to
injectors
Check fuel manifold pressure, refer to Fuel Sys-
tem
Incorrect, fouled, or worn spark
plugs
Replace spark plugs
Fuel injectors not working Check voltage at injectors
Excessive fuel or oil, engine
flooded
Check for leaking injectors, leaking fuel or oil lift
pump, or leaking vapor separator vent, refer to
Fuel System
Low or no 55 V alternator out-
put
Check voltage on 55 V circuit, refer to System
Analysis and Electrical and Ignition
Capacitor or 55 V circuit wiring Check capacitor and 55 V circuits, refer to Sys-
tem Analysis and Electrical and Ignition
Ignition Check ignition, refer to System Analysis and
Electrical and Ignition
CPS input to EMM, no sync Check RPM reading while cranking
No ignition system control sig-
nal from EMM to ignition coils
Check cranking RPM (300 minimum), refer to
System Analysis
Low or no compression Check compression
Water in engine Check condition of spark plugs and cylinders
Internal powerhead damage Check and repair as needed
Leaking cylinder/crankcase,
intake manifold, or reed valves
Check and repair as needed
EMM program, timing, or oper-
ation
Check EMM program and timing; check injector
information (by location and serial number)
Neutral switch, tiller models Check neutral switch operation
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