Procedure
1. Check whether the exhaust relief hole on the outboard is submerged when the engine is trimmed full in while running at idle speed. WARNING: If the exhaust relief hole becomes submerged, it 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 above the waterline (out of the water).
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Ask Boat Guru about thisSpec · 1 in conditions={"engine_state":"running at idle speed"}
Diagnostic · Cause: Exhaust restriction due to exhaust relief hole being below the waterline Test: Verify exhaust relief hole is at least 25.4 mm (1 in.) above waterline with engine running at idle speed
Spec · 25.4 mm conditions={"engine_state":"running at idle speed"}
Procedure · 1. Reduce the engine speed below 2000 RPM. WARNING: Operating the engine with the outboard in the tilt range can damage the engine or the transom. Do not exceed 2000 RPM. 2. Tilt the outboard up. Verify all of the coo...
Diagnostic · Cause: Cooling water intake holes are above the waterline due to excessive trim-out