Filling - Mercury T6200 TowSport Operation And Maintenance Manual

Section 4 - Maintenance
1. Allow the engine to cool down to the ambient air temperature.
2. Remove the cap from the heat exchanger and observe the fluid level.
3. The coolant level in the heat exchanger should be at the bottom of the filler neck. If the coolant level is low, verify that there
is fluid in the coolant recovery bottle. If the recovery bottle is empty, contact your authorized Mercury MerCruiser dealer.
4. Install the cap onto the heat exchanger.
IMPORTANT: When installing the cap, be sure to tighten it until it seats on the filler neck.
5. With the engine at normal operating temperature, check the coolant level in the coolant recovery bottle.
6. The coolant level should be between the ADD and FULL marks.
7. Add the specified fluid as necessary.
Tube Ref No.
Extended Life Antifreeze/Coolant
122

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.
Air trapped in the closed cooling system can cause the engine to overheat, resulting in engine damage. Minimize the
possibility of trapping air when initially filling the closed cooling system by positioning the boat so that the front of the engine
is higher than the rear of the engine.
NOTE: Add coolant only when the engine is at normal operating temperature.
Page 34
Heat exchanger cap
Description
6102
Where Used
Closed Cooling System
NOTICE
NOTICE
NOTICE
61326
Part No.
92-877770K1
90-8M0128975 JUNE 2017
eng