Engine Break-In Procedure; Starting The Engine - Remote Control Models - Mercury 25 EFI FourStroke User Manual

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.
3. Make sure the cooling water intake is submerged.
Engine Break‑in Procedure
IMPORTANT: Failure to follow the engine break‑in procedures
can result in poor performance throughout the life of the engine
and can cause engine damage. Always follow break‑in
procedures.
1. For the first hour of operation, run the engine at varied
throttle settings up to 3500 RPM or at approximately half
throttle.
2. For the second hour of operation, run the engine at varied
throttle settings up to 4500 RPM or at three‑quarter throttle,
and during this period of time, run it at full throttle for
approximately one minute every ten minutes.
3. For the next eight hours of operation, avoid continuous
operation at full throttle for more than five minutes at a time.
Starting the Engine ‑ Remote Control Models
Before starting, read the Pre‑Starting Check List, Pre‑Starting
Instructions, and Engine Break‑in Procedure in the Operation
section.
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OPERATION
NOTICE
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