Setting Trim Angle While Running Engine At Idle Speed; Operating In Shallow Water - Mercury 225 Pro XS User Manual

Setting Trim Angle While Running Engine at Idle
Speed
Submerging the exhaust relief hole on the outboard can happen on some
boats if you trim full in while running at idle speed, resulting in, exhaust
restriction, rough idle, excessive smoke, and fouled spark plugs. If this
condition exists, trim outboard up until exhaust relief hole is out of the water.
a - Relief hole submerged (wrong)
b - Relief hole above water line (correct)

Operating in Shallow Water

When operating your boat in shallow water, you can tilt the outboard
beyond the maximum trim range to prevent hitting bottom.
Avoid engine or transom damage. Do not exceed 2000 RPM when the
outboard is being operated in the tilt range.
1. Reduce engine speed below 2000 RPM.
2. Tilt outboard up. Make sure all the cooling water intake holes stay
submerged at all times.
3. Operate the engine at slow speed only.
Models with a three‑ram trim system: If engine speed exceeds 2000 RPM,
the outboard will automatically return down to the maximum trim range.
Models with a single‑ram trim system: The outboard will remain at the
selected tilt position, regardless of engine RPM.
OPERATION
a
!
b
CAUTION
50
or35-1