Draining Water From The Gen Iii Cool Fuel Module - Mercury 350 MAG Manual

1. Insert a small wire repeatedly to make sure that vent holes, water drain holes, and passages are unobstructed and open.
d
a
Sterndrive Water Drain Holes
a - Speedometer pitot tube
b - Trim tab cavity vent hole
c - Trim tab cavity drain passage
d - Gear housing water drain hole (1 each ‑ port and starboard)
e - Gear housing cavity vent hole
f - Gear housing cavity drain hole
The universal joint bellows may develop a set when stored in a raised or up position, causing the bellows to fail when returned
to service and allowing water to enter the boat. Store the sterndrive in the full down position.
2. Lower the sterndrive unit to the full down/in position.
3. For additional assurance against freezing and rust, after draining, fill the cooling system with propylene glycol mixed to the
manufacturer's recommendation to protect engine to the lowest temperature to which it will be exposed during freezing
temperatures or extended storage
IMPORTANT: Mercury MerCruiser requires that propylene glycol antifreeze, mixed to the manufacturers instructions, be used
in the seawater section of the cooling system for freezing temperatures or extended storage. Make sure that the propylene
glycol antifreeze contains a rust inhibitor and is recommended for use in marine engines. Be certain to follow the propylene
glycol manufacturer's recommendations.

Draining Water From the Gen III Cool Fuel Module

Mercury MerCruiser recommends draining the Gen III Cool Fuel module if it is equipped with a drain plug.
1. Remove the drain plug from the Gen III Cool Fuel module and allow the water to completely drain from the module.
2. Inspect the drain plug and the O‑ring for damage. Replace if needed.
3. Place the O‑ring on the drain plug and install the drain plug in the module drain hole. Tighten the drain plug to finger tight.
90-8M0050539 MAY 2011
eng
e
b
NOTICE
a
b
c c
d
Section 6 - Storage
f
c
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a - Gen III Cool Fuel module
b - Fuel inline fitting
c - Drain plug
d - O‑ring
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