Need a 2nd opinion. I have a 1978 V8 Volvo Penta. Basically a Chevy V8. I got a steal on this boat, had my mechanic come out and take a look at her. Tried to start she wanted to turn over but started to freeze. He stopped right there said there might be some rust in the cylinders. Well there was rust in the cylinders. he tried to unfreeze it by using diesel fuel. No luck. his next step is to pull the engine take off the oil pan and try and free up the cylinders up from underneath. Does this sound right? Does this sound like more than just rust in the cylinders. Maybe bearings or broken crank? Anybody dealt with this before.