Engine Break-In Procedure - Mercury 25 Jet 4-Stroke Manual

2. Check the engine oil level.
3. Ensure the driveshaft bearing on the jet drive is lubricated.
Refer to Maintenance - Lubrication Points.
Engine Break‑in Procedure
Severe damage to the engine can result by not complying with
the engine break‑in proceedure. Engine damage may not be
covered by the limited warranty.
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.
OPERATION
CAUTION
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