milky oil

[chongster]

I have a 2007 15hp Yamaha 4 stroke that is getting water in the oil. I know it could be a head gasket but what else could it be? Thanks

[fairdeal]

what else could it be?

warped oil pan casting?

or maybe - which would be best case -

"stuck open" / missing thermostat ?

[99yam40]

not sure I follow how a stuck open or missing stat could cause water in oil
Fuel probably but not water.

OP cracked head/block, corrosion or bad gaskets on pan or other places

[pstephens46]

HC! 15HP Yamaha. Even I could take the head off that and replace the gasket.

I'll call BS on this. Dude, you refused to change thermostats...