Re: 25hp. problem
Overheating was my thought also. Whenever it's running and up to temp, you need to be able to lay your fingers on the head for 2-3 seconds. If it's too hot for that, it's probably overheating. <br /><br />When was the water pump impeller replaced last?<br /><br />Also make sure all connections from the battery to the solenoid, and the solenoid to the starter are in good shape. They can look clean, but be making poor connection. Best to remove them, clean, and re-connect.