Storage; Storage Preparation - Mercury 300 XS 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. Follow
these storage procedures to prepare your outboard for out‑of‑season 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: Fuel containing alcohol (ethanol or methanol) can cause a
formation of acid during storage that can damage the fuel system. If the fuel
being used contains alcohol, Mercury Marine recommends draining as much of
the remaining fuel 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 respective containers, to the fuel tank before
the final operation of the boat prior to storage. Fuel Stabilizer helps prevent the
formation of varnish and gum in the fuel. Quickleen helps clean and lubricate
the fuel injectors.
1. Pour additives into the fuel:
a. Portable Fuel Tank ‑ Pour the required amount of fuel stabilizer into
fuel tank. Close the tank and tip back and forth to mix.
b. Permanently Installed Fuel Tank ‑ Pour the required amount of fuel
stabilizer into a separate container. Add approximately one quart of
fuel to the container. Mix and pour into the fuel tank.
2. Remove the drain hose from the aft hose fitting (right side of the
chamber). Hold the unattached end of the hose over a suitable container.
a

STORAGE

c
b
NOTICE
a - Filter drain screw
b - Drain hose
c - Aft hose fitting
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