Filling - Mercury 350 MAG Manual

1. Remove the cap from the heat exchanger and observe the fluid level.
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.
6. Add the specified fluid as necessary.
Tube Ref No.
Extended Life Antifreeze/
122
Coolant

Filling

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.
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.
90-8M0050539 MAY 2011
eng
Heat exchanger cap
Description
6102
Where Used
Closed Cooling System
NOTICE
NOTICE
Section 5 - Maintenance
33172
92-877770K1
Part No.
Page 85