Had a small leak at shaft of Sea Cooling Water pump (Johnson). Took it out to change the lip seal, impeller and cover o-ring.
Just today run the engine and the exhaust (underwater) sounds very funny.
Spent hours tracing cooling water from intake thru to Mixing Elbow. Everything looks right just that water isn't flowing to Mixing Elbow. Even open up heat exchanger and mixing elbow to check! Last straw, put in a spare complete pump and it works! Had a relook at the old repaired pump and now suspect the pump cover is wore such that a new o-ring created a gap between cover and impeller thus short circuiting the pumping action.
What's your thought on this?
Just today run the engine and the exhaust (underwater) sounds very funny.
Spent hours tracing cooling water from intake thru to Mixing Elbow. Everything looks right just that water isn't flowing to Mixing Elbow. Even open up heat exchanger and mixing elbow to check! Last straw, put in a spare complete pump and it works! Had a relook at the old repaired pump and now suspect the pump cover is wore such that a new o-ring created a gap between cover and impeller thus short circuiting the pumping action.
What's your thought on this?