When I put my boat away last winter, it was running perfectly fine, I bring it out of storage, and do all my usual checks, and run it. It's a 350 Mercruiser and it slowly overheats at idle, faster with increased rpm.
I have replaced the impeller, the water pump on the engine, both manifolds, and removed the thermostat with no change in the condition. Engine and manifolds are always drained of water every winter before boat goes into storage.
The reason for changing the manifolds, is when I bought the boat 13 years ago, the person didn't winterize it, and the block was cracked, and both exhaust manifolds. I replaced the engine brand new, and had the manifolds welded, and never had a problem for the last 13 years. Always in fresh water, and lake water cooled engine.
I'm at a loss for what could happen during storage for this to happen. Risers are spotless, no build-up what so ever.
Thanks for any help.
I have replaced the impeller, the water pump on the engine, both manifolds, and removed the thermostat with no change in the condition. Engine and manifolds are always drained of water every winter before boat goes into storage.
The reason for changing the manifolds, is when I bought the boat 13 years ago, the person didn't winterize it, and the block was cracked, and both exhaust manifolds. I replaced the engine brand new, and had the manifolds welded, and never had a problem for the last 13 years. Always in fresh water, and lake water cooled engine.
I'm at a loss for what could happen during storage for this to happen. Risers are spotless, no build-up what so ever.
Thanks for any help.
