Storage Preparation; Fuel System - Mercury FourStroke 2.5 Service Manual

Maintenance
• Steering friction knob ‑ lubricate threads.
• Tilt support pin ‑ lubricate pin
• Transom clamp screws ‑ lubricate threads
• Tilt pivot point ‑ lubricate with lightweight oil
a
b
c
• Tiller handle rubber bushing ‑ lubricate internal diameter with lightweight oil.
• Swivel bracket ‑ remove four bolts and rear cover and lubricate the inner nylon bushing.
a

Storage Preparation

The major consideration in preparing your outboard for storage is to protect it from rust, corrosion, and damage caused by
freezing of trapped water.
The following storage procedures should be followed to prepare your outboard for out of season storage or prolonged storage
(two months or longer).
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.

Fuel System

IMPORTANT: Gasoline containing alcohol (ethanol or methanol) can cause a formation of acid during storage and can damage
the fuel system. If the gasoline being used contains alcohol, it is advisable to drain as much of the remaining gasoline as
possible from the fuel tank and engine fuel system.
Fill the fuel tank and engine fuel system with treated (stabilized) fuel to help prevent formation of varnish and gum. Proceed
with the following instructions.
Page 1B-10
a - Tilt support pin
b - Tilt pivot point
c - Transom clamp screws
b
c
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a - Rear cover
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NOTICE
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90-8M0065421 NOVEMBER 2012