Section 5 - Maintenance
Page 74 90-864195070 JUNE 2007
1. Remove the cap from the heat exchanger and observe the fluid level.
a
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a - Heat exchanger cap
2. The coolant level in the heat exchanger should be at the bottom of the filler neck. If the
coolant level is low, contact your authorized Mercury MerCruiser dealer.
3. Install the cap onto the heat exchanger.
IMPORTANT: When reinstalling the pressure cap, be sure to tighten it until it seats on the
filler neck.
4. With the engine at normal operating temperature, check the coolant level in the coolant
recovery bottle.
5. The coolant level should be between the "ADD" and "FULL" marks.
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6. Add the specified fluid as necessary.
Tube Ref No. Description Where Used Part No.
122
Extended Life Antifreeze/
Coolant
Closed Cooling System 92-877770K1
Filling
NOTICE
Using propylene glycol antifreeze in the closed cooling system can damage the cooling
system or the engine. Fill the closed cooling system with an ethylene glycol antifreeze
solution suitable to the lowest temperature to which the engine will be exposed.