Changing Positive Crankcase Ventilation Valve; Cleaning The Flame Arrestor - Mercury 540 Bravo Manual

IMPORTANT: If the oil hoses need to be removed from the cooler, be
prepared to cap or plug them to avoid draining the power steering reservoir.
a
a - Hose clamps (2)
2. Install the cooler and tighten the hose clamps securely.
3. Check the power steering fluid level.
4. Start the engine and inspect the cooling system for leaks.

Changing Positive Crankcase Ventilation Valve

This engine is equipped with a positive crankcase ventilation valve (PCV).
Change the valve every 150 hours of operation.
• Pull valve out of intake manifold and remove valve from hose.
• Install new PCV valve into hose, and install into intake manifold.
• Ensure that the valve is tightly seated in manifold.
Use only Mercury MerCruiser replacement parts.

Cleaning the Flame Arrestor

Fuel is flammable and explosive. Ensure that 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.
MAINTENANCE
WARNING
!
74
a
8031
eng