Prestarting Check List; Operating In Freezing Temperatures; Operating In Saltwater Or Polluted Water - Mercury 150 Operation, Maintenance And Installation Manual

IMPORTANT: Oil must be NMMA certified TC‑W3 2‑Cycle oil.
Periodically consult with your dealer to get the latest gasoline and oil
recommendations. If Mercury Precision or Quicksilver 2‑Cycle Outboard Oil is
not available, substitute another brand of 2‑Cycle outboard oil that is NMMA
Certified TC‑W3. The use of an inferior 2‑Cycle outboard oil can reduce engine
durability. Damage from use of inferior oil may not be covered under the limited
warranty.

Prestarting Check List

Operator knows safe navigation, boating, and operating procedures.
An approved personal flotation device of suitable size for each person
aboard and readily accessible. It is the law.
A ring‑type life buoy or buoyant cushion designed to be thrown to a
person in the water.
Know the boat's maximum load capacity. Look at the boat capacity plate.
Fuel supply OK.
Oil supply (oil injection) OK.
Arrange passengers and load in the boat so the weight is distributed
evenly and everyone is seated in a proper seat.
Tell someone where you are going and when you expect to return.
It is illegal to operate a boat while under the influence of alcohol or drugs.
Know the waters and area you will be boating; tides, currents, sand bars,
rocks, and other hazards.
Make the inspection checks listed in Maintenance ‑ Inspection and
Maintenance Schedule.

Operating in Freezing Temperatures

When using your outboard or having your outboard moored in freezing or near
freezing temperatures, keep the outboard tilted down at all times so the
gearcase is submerged. This prevents the trapped water in the gearcase from
freezing and causing possible damage to the water pump and other
components.
If there is a chance of ice forming on the water, the outboard should be
removed and drained completely of water. If ice should form at the water level
inside the outboard driveshaft housing, it will block water flow to the engine
causing possible damage.

Operating in Saltwater or Polluted Water

We recommend that you flush the internal water passages of your outboard
with fresh water after each use in salt or polluted water. This will prevent a
buildup of deposits from clogging the water passages. Refer to Maintenance ‑
Flushing the Cooling System.
OPERATION
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