Mercury 8/9.9 BigFoot, Manual, Page: 93 / 153

OPERATION
eng
81
2. Check the engine oil level.
27233
NOTICE
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.
26837
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 2000 RPM or at approximately half
throttle.
2. For the second hour of operation, run the engine at varied
throttle settings up to 3000 RPM or at three‑quarter throttle,
and at full throttle for approximately one minute every ten
minutes.