Starting The Engine - Mercury 150 Operation, Maintenance And Installation Manual

• Avoid using a hydraulic jack plate to raise the engine during the break‑in
cycle.
Next Three Hours: Change the engine speed every 10 minutes.

Starting the Engine

Before starting, read the Prestarting Check List, special operating
instructions, and Engine Break‑in Procedure in the Operation section.
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.
1. Lower the outboard to the vertical operating position. Make sure all
cooling water intake holes are submerged.
2. Open the fuel tank vent screw (in filler cap) on manual venting type fuel
tanks.
3. Position the fuel line primer bulb so the arrow on the side of the bulb is
pointing up. Squeeze the fuel line primer bulb several times until it feels
firm.
OPERATION
Break‑in Procedure
NOTICE
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