So i have water in my motor. Its a cracked block from improper winterizing. Out on the lake today and motor starts foaming like a rabid dog , from the valve cover vents. Any way i need to replace the motor with the same or larger one( More fun). Its a 1995 4.3 Mercruiser Vortec thats in a 1995 Maxum 1800sr. Any advice on what motor would be best ( and where to start looking for one other than ebay). Ive read any 4.3 gm motor will work from like an s10. .......................................Also i ran the boat for about 10 minuted when i shut it off. Is the whole motor a loss or can i just get another block??? I know noone can definitively answer this last question with out a complete inspection of bearings cylinders etc. , but opinions are welcome from the experts.