Section 5 - Maintenance
Page 66
90-8M0070851
eng
AUGUST 2012
4. If the coolant level is low, stop the engine and allow the engine to cool.
a. Inspect the coolant recovery system for leaks.
b. Inspect the O‑ring in the pressure cap for damage and replace if necessary.
a -
Pressure cap
b -
Over pressure valve
c -
O‑ring
c. The pressure cap maintains pressure on the cooling system and may not be holding pressure properly. To have the
cap tested, contact your Mercury Diesel authorized repair facility.
d. Refer to
Filling
and add the specified coolant as necessary.
IMPORTANT: When installing the pressure cap, be sure to tighten it securely until it clicks to prevent coolant loss.
5. If the coolant level is correct, install the pressure cap and tighten securely until it clicks.
Filling
1. Allow the engine to cool.
2. Remove the pressure cap from the coolant expansion tank.
3. If the coolant is low in the coolant expansion tank, add the specified coolant as necessary to bring the level between the
"min" mark and the maximum mark.
a -
Coolant reservoir
b -
Minimum mark
c -
Maximum mark
d -
Coolant reservoir pressure cap
Description
Where Used
Part Number
Marine Engine Coolant ‑ 60%
water and 40% G12/G12+
antifreeze (lilac colored) as per
TL VW 774D
(Only available in Europe)
Closed cooling system
92‑813054A2
Fleetguard Compleat with DCA4
Fleetguard part number: CC2825
8M0070979
IMPORTANT: When installing the pressure cap, be sure to tighten it securely until the cap clicks to prevent coolant loss.
4. Install the pressure cap. Tighten securely until the cap clicks.
Changing
Change (replace) the engine coolant at the prescribed interval. Refer to
Replacing the Engine Coolant in the Closed
Cooling System
.
a
b
c
50656
50644
a
b
c
d
