The most common symptoms are engine overheating
Start the engine and carefully inspect for any leaks around the filter and connections
The arrow on the primer bulb should point in the direction of fuel flow (from the tank to the engine)
water contamination in the engine oil (giving it a milky appearance)
9 4-Stroke 1996–2004 63V-W0078-01-00
Exhaust Water Shutter (Flapper) – Fits MerCruiser 2.5L, 3.0L, 3.7L Engines (Replaces 60930, 25-43809) 173HP The most common symptoms areProduct Details This Exhaust Water Shutter (Flapper) Fits MerCruiser 2. 5L, 3. 0L, 3. 7L Engines (Replaces 60930, 25 43809) is an essential replacement part for MerCruiser stern drives. Specifically designed for 2. 5L, 3. 0L, and 3. 7L inline 4 cylinder engines from various model years, it functions as a critical one way valve in the exhaust system to prevent water from flowing back into the engine cylinders. This part serves as a direct replacement