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post #1 of Old 04-22-2019 Thread Starter
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Universal diesel wont start when engine is hot!

I have a M320B three cyclinder diesel in my Catalina 30. I just recently bought the boat. When engine is cold it fires up first try. If I turn it off and restart it again it starts first try again. If I let it run 20 minutes and engine gets hot, turn it off and then try to restart cranks really slowly and wont start. I have to let the engine sit for half hour or longer before it will start again. I believe the problem is electrical because it cranks but just cranks too slowly to start. I had starter rebuilt, I replaced solenoid thats on top the engine, I cleaned/sanded all the wire and connections, batteries are new and fully charged. My next step is I'm gonna change the solenoid on top of starter. If that doesnt fix it I dont know what else to try. Any suggestions would be great! Thanks
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