Procedure
1. Check if the exhaust relief hole on the outboard is submerged when the engine is trimmed full in while running at idle speed. WARNING: Submerged exhaust relief hole may result in exhaust restriction, rough idle, excessive smoke, and fouled spark plugs. 2. If the exhaust relief hole is submerged, trim the outboard up until the exhaust relief hole is out of the water.
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Ask Boat Guru about thisSpec · 2000 RPM conditions={"mode":"Shallow water operation","note":"If engine speed exceeds 2000 RPM, outboard will automatically return down to maximum trim range"}
Diagnostic · Cause: Exhaust relief hole submerged due to engine trimmed full in while running at idle speed Test: Visually inspect whether the exhaust relief hole is above the waterline while engine is running at idle
Spec · 650 RPM conditions={"note":"With engine fully warmed up"}
Procedure · 1. Reduce engine speed below 2000 RPM. 2. Tilt the outboard up. Make sure all water intake holes stay submerged at all times. 3. Operate the engine at slow speed only. If engine speed exceeds 2000 RPM, the outboard wi...
Diagnostic · Cause: Outboard trimmed out too far, raising cooling water intake holes above the waterline Test: Verify cooling water intake holes are below waterline at current trim angle