Outboard motor troubleshooting
4-9
Fuel not supplied (all
cylinders)
Pinched or kinked fuel hose Check the fuel hose. 2-26
Clogged fuel filter element
Check the fuel filter element for dirt
and ob
structions.
6-6
Clogged fuel strainer
Check the fuel strainer for dirt and
obstr
uctions.
6-9
Fuel leakage Check the fuel line for leakage. 2-26
High-pressure fuel pump
malfunction
Check the high-pressure fuel pump
oper
ation using the YDIS.
5-23
Measure the high-pressure fuel
pump
resistance.
5-23
Short, open, or loose con-
nection in high-pressure
fuel pump circuit
Measure the high-pressure fuel
pump
input voltage.
5-23
Check for continuity between the
high-p
ressure fuel pump and the
fuse box.
A-8
A-10
Check for continuity between the
high-p
ressure fuel pump and
ground.
A-8
A-10
Fuel pump malfunction
Check the fuel pump for leakage. 6-9
Check the diaphragm for tears. 6-10
Check the camshaft. 7-38
Compression pres-
sure is low
Improper valve timing
Check the valve timing. 7-13
Check the timing belt. 7-13
Compression leakage
Check the valve for bends or stick-
ing.
7-32
Check the piston and piston rings for
dama
ge.
7-46
Check the cylinder for scratches. 7-48
—
Intake air passage mal-
function
Check the ISC valve for sticking. 5-20
Check the intake manifold and throt-
tle body for air leakage.
6-19
Symptom 2 Cause Checking steps
See
p
age
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