T-363
Trouble Check Chart
Outboard Surges, Runs Rough
T
Outboard Surges, Runs Rough
OBSERVATION POSSIBLE CAUSE PROCEDURE
1200 RPM and above S.A.F.E. Access EMM fault codes
May be erratic or
inconsistent
Incorrect, fouled, or worn spark
plugs
Replace spark plugs
Water in fuel system Check water separator/fuel filter, sample fuel from
fuel return manifold test port
Contaminated or poor fuel
quality
Check and replace fuel supply
Low or erratic fuel pressure Check pressure, refer to Fuel System
Air in fuel system Check for air in fuel supply manifold, refer to Fuel
System (vapor separator venting and fuel supply)
Fuel supply restricted Check primer bulb, anti-siphon valve, and fuel
pick-up, check for fuel system air leaks
Restricted or leaking fuel injec-
tor(s)
Check injectors, refer to Fuel System
Faulty wiring, connections,
grounds, or CPS air gap
Check all grounds, connections, and wiring.
Check CPS air gap.
Low alternator output (55 V) Check voltage on 55 V circuit, refer to System
Analysis and Electrical and Ignition
EMM program, timing, or oper-
ation
Check EMM program and timing; check injector
coefficients; and monitor injector circuits and igni-
tion primary outputs
Weak or erratic ignition opera-
tion
Check ignition, refer to System Analysis and
Electrical and Ignition
Capacitor or 55 V circuit wiring Check capacitor and 55 V circuit (white/red), refer
to System Analysis and Electrical and Ignition
Restricted engine exhaust Check and repair as needed
Audible noise Internal powerhead damage Check and repair as needed
Damaged gearcase Inspect gearcase and lubricate
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