INSTALLATION
90-888438 JUNE 2002 Page 1D-23
Water By-Pass System
The water by-pass system is designed to improve powerhead cooling at idle speed.
1. Locate the water by-pass components (provided).
a
b
c
a-Thru-Hull Fitting
b-Brass Nut
c-Hose Clamp
IMPORTANT: The thru-hull fitting must be correctly positioned in the boat transom
as instructed in Step 3.
2. Install water hose (not supplied) to connect thru-hull fitting to bypass fitting on engine.
59414
a
a-Water By-Pass Hose
3. Select the mounting location for the through-hull fitting as follows:
A
2 in. (50 mm)
Minimum
Top View of
Transom
A
Back View
of Transom
Water Line
• The thru-hull fitting must be mounted in either side of the transom within the zones
marked A.
• The thru-hull fitting must be located a Minimum of 2 in. (50 mm)
above the water line
when boat is at its maximum load capacity.
• The water by-pass hose must slope down towards the thru-hull fitting at a minimum rate
of 1 in. (25 mm) drop per 12 inches (300 mm) of hose.
• The thru-hull fitting should be positioned so the water spray will be pointed downward.
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