4-29
Outboard motor troubleshooting
Fuel pressure is low
Fuel leakage Check for fuel leakage. 2-60
Clogged fuel filter
Check the fuel filter for dirt and ob-
structions.
6-4
Clogged fuel strainer
Check the fuel strainer for dirt and
obstructions.
6-14
Direct injection pump mal-
function
Check the direct injection pump. 6-19
Cam lobe (direct injection
pump) wear
Check the cam shaft. 7-50
High-pressure fuel pump
malfunction
Measure the high-pressure fuel
pump resistance.
5-29
Relief valve malfunction Check the relief valve. 6-14
Feed valve malfunction Check the feed valve. 6-15
Injector driver malfunction Check the injector driver circuit. 5-28
Fuel pressure sensor mal-
function
Check the fuel pressure sensor. 5-32
Fuel not supplied
(some cylinders)
Fuel injector malfunction
Check the fuel injector operation
using the YDIS.
5-29
Measure the fuel injector resistance. 5-29
Short, open, or loose con-
nection in fuel injector cir-
cuit
Check for wiring continuity between
the fuel injector and the electrical
management box.
A-12
Check for wiring continuity between
the fuel injector and the engine
ECM.
A-12
Clogged fuel injector Replace the fuel injector. 6-18
Relief valve malfunction Check the relief valve. 6-14
Feed valve malfunction Check the feed valve. 6-15
Injector driver malfunction Check the injector driver circuit. 5-28
Engine ECM malfunction Replace the engine ECM. 7-38
Symptom 2 Cause Checking steps
See
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