FUEL INJECTORS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 5C-9
NOTICE
Read Precautions at front of this SECTION before proceeding.
Injector Test (Engine Misfiring)
7. Supply cooling water to seawater inlet holes.
8. Put on safety glasses.
9. With the engine operating at idle, carefully loosen injector pipe sleeve nut at injectors,
one cylinder at a time.
a. If idle rpm changes, injector is operating.
b. If idle rpm does not change, injector may be faulty.
70148
17 mm
a
Typical
a-Sleeve Nut At Injector
10. Check all injectors, one at a time.
11. Stop engine. Replace injector or injectors as necessary.
12. If engine continues to misfire, check for mechanical problems (faulty injection pump,
burned valves).
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