Service manual

CLOSED COOLED MODELS SERVICE MANUAL NUMBER 26
Page 6B-12 90-861329--1 MARCH 1999
IMPORTANT: Do not use Propylene Glycol Antifreeze in the closed cooling section
of the engine.
The following draining instructions apply to all engines equipped with closed cooling. The
location of petcocks that require opening and hoses that require removal are represented
on the following pages for the individual engines.
IMPORTANT: Observe precautions previously outlined before proceeding.
1. Remove pressure cap from coolant tank.
2. Drain coolant from locations as shown for your model and engine. (Refer to the appropri-
ate diagram on the following “Draining Diagrams” page.)
3. After coolant has drained completely, coat threads of drain plugs with Quicksilver Per-
fect Seal and install drain plugs and hoses. Tighten clamps and drain plugs securely.
4. Remove coolant recovery bottle from mounting bracket and pour out coolant.
5. Clean system as outlined in “Cleaning System.”
6. Fill system as outlined in “Filling Closed Cooling Section.”
SINGLE POINT DRAIN SYSTEM
Some models are equipped with a single point drain system consisting of 2 hoses with hard-
ware and a T-handle retrieval tool (shown below). This system drains the seawater section
of the engine only.
76242
a
b
a-T-handle Retrieval Tool
b-Hoses
Index