Storage; Storage Preparation; Protecting Internal Engine Components; Protecting External Outboard Components - Mercury 135 Optimax Operation And Maintenance Manual

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).
Never start or operate your outboard (even momentarily) without water circulating through all the cooling water
intake holes in the gearcase to prevent damage to the water pump (running dry) or overheating of the engine.
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, remote fuel line, and engine fuel system.
The most effective method for storage preparation is to add the recommended amount of Mercury Precision fuel
Stabilizer and Mercury Precision Quickleen products as described on their containers to the fuel tank before the
last operation of the boat. Adding Fuel Stabilizer will help prevent the formation of varnish and gum in the gasoline.
The Mercury Precision Quickleen product will help clean and lubricate the fuel injectors.
1. Portable Fuel Tank - Pour the required amount of gasoline stabilizer (follow instructions on container) into
fuel tank. Tip fuel tank back and forth to mix stabilizer with the fuel.
2. Permanently Installed Fuel Tank - Pour the required amount of gasoline stabilizer (follow instructions on
container) into a separate container and mix with approximately one quart (one liter) of gasoline. Pour this
mixture into fuel tank.
3. Remove the water separating fuel filter from the engine. Empty the fuel into a suitable container and discard
the filter properly.
4. Premix the following in a container:
• 8 cc (0.27 oz.) or two teaspoons of Mercury Precision Quickleen lubricant.
• 8 cc (0.27 oz.) or two teaspoons of Mercury Precision Fuel Stabilizer.
5. Pour this mixture in a new water separating fuel filter. Reinstall the fuel filter.
6. Prime the fuel system as outlined in the Operation - Starting the Engine.
7. Place the outboard in water or use the flushing attachment for circulating cooling water. Start the engine and
run at idle speed for 10 minutes to allow the treated fuel to fill the fuel system.

Protecting Internal Engine Components

NOTE: Make sure the fuel system has been prepared for storage. Refer to Fuel System, preceeding.
IMPORTANT: Refer to Spark Plug Inspection and Replacement for correct procedure for removing spark plug
leads.
1. Remove the spark plugs and add approximately 30 ml (1 oz.) of engine oil into each spark plug hole.
2. Rotate the flywheel manually several times to distribute the oil in the cylinders.
3. Reinstall spark plugs.

Protecting External Outboard Components

• Lubricate all outboard components listed in Maintenance - Inspection and Maintenance Schedule.
• Touch up any paint nicks. See your dealer for touch-up paint.
• Spray Quicksilver or Mercury Precision Lubricants Corrosion Guard on external metal surfaces (except
corrosion control anodes).

Gearcase

• Drain and refill the gearcase lubricant (refer to Maintenance - Gearcase Lubrication).

STORAGE

CAUTION
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