Section 5 - Maintenance
90-899883272 MARCH 2008 Page 63
Cleaning the Flame Arrestor
!
WARNING
Fuel is flammable and explosive. Ensure the key switch is off and the lanyard is positioned
so that the engine cannot start. Do not smoke or allow sources of spark or open flame in
the area while servicing. Keep the work area well ventilated and avoid prolonged
exposure to vapors. Always check for leaks before attempting to start the engine and
wipe up any spilled fuel immediately.
1. Loosen the flame arrestor clamp.
2. Remove the flame arrestor.
a - Flame arrestor
b - Clamp
IMPORTANT: Do not use an acid‑based cleaner as it can deteriorate portions of the flame
arrestor.
3. Clean the flame arrestor with warm, soapy water.
4. Inspect the flame arrestor for holes, cracks, or deterioration. Replace if necessary.
5. Allow the flame arrestor to air dry completely before use.
6. Install the flame arrestor. Tighten the flame arrestor clamp to specifications.
Description Nm lb‑in. lb‑ft
Flame arrestor clamp 3 26 –
7. Install the engine cover.
Positive Crankcase Ventilation Valve (PCV)
CHANGING
IMPORTANT: You cannot clean the PCV valve. Replace the PCV valve if it is defective or
sticking. To ensure compliance with emission regulations, use only Mercury MerCruiser
replacement parts.
1. Remove the engine information plate.
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