Storage; Storage Preparation; Protecting Internal Engine Components - Mercury 135 OptiMax 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).
Failure to provide sufficient cooling water will damage the water pump and cause the engine to
overheat. Provide a sufficient supply of water at 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, 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.
Flushing Device

Protecting Internal Engine Components

NOTE: Make sure the fuel system has been prepared for storage. Refer to Fuel System, preceeding.
IMPORTANT: Refer to
plug leads.

STORAGE

NOTICE
9192
Spark Plug Inspection and Replacement for correct procedure for removing spark
Attaches to the water intakes; provides a
fresh water connection when flushing the
cooling system or operating the engine.
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91-44357Q 2