MerCruiser 3.0 TKS, User Manual

Page: 61 / 112

Section 5 - Maintenance
90-8M0053372
eng
NOVEMBER 2010 Page 53
1. Remove the cap from the heat exchanger and observe the fluid level.
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.
NOTICE
Without sufficient cooling water, the engine, the water pump, and other components will overheat and suffer damage. Provide
a sufficient supply of water to the water inlets during operation.
a
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