Bouught a new 15 HP 4 stroke Suzuki. Overheated first 15 minutes in the lake. Repaired by dealer. Then I ran in a barrel of water to test before I got stuck again. 15 minutes- overheated again. Same dealer says water pump again is fried. Says I ran it dry. I know I didn't. What else could be wrong with this engine to cause this? This dealer thinks it is the water pump but repairing it didn't solve the problem. What else could it be? Somebody PLEASE help me. Suzuki says it won't cover the second repair. Thanks, Whitecaps