SOS - water in oil - 4.3 yamaha 4.3

[mnbigbass]

Hello , This is my first time posting . I need some advice on a 1990 ? yamaha 4.3 :facepalm:. I did a oil change and had a milkshake come out . Changed oil , took it out on the lake for about 40 miles and theres about 2 quarts extra on the dipstick. Boat starts good and once warmed up it has lots of power. Any thoughts ? Thanks for the help !!!

 

[Bondo]

Re: SOS - water in oil - 4.3 yamaha 4.3

Ayuh,... More than likely, it's a freeze cracked block...

Pressure test the cooling system with air...

 

[mnbigbass]

Re: SOS - water in oil - 4.3 yamaha 4.3

is there a way to tell what one it is , block , gasket , seal ? With out tearing it apart. How about making it a closed system and putting sealer in to stop leak ?

 

[Bondo]

Re: SOS - water in oil - 4.3 yamaha 4.3

is there a way to tell what one it is , block , gasket , seal ? With out tearing it apart. How about making it a closed system and putting sealer in to stop leak ?

Nope,... Ya need a Replacement long block...