[WillieB]

I have a j650D 1990 model Yamaha Waverunner. It has gotten water in the crankcase from the engine compartment flooding (sitting in rain outside on trailer with nose down). Is there anyway to clean this without disassembling?

Thanks and Have a Great Day,
Willieb

 

[JayDawg]

If the water is in the motor, and has been sitting a long time, I'm thinking that your gonna have to disassemble the motor and possibly rebuild.

 

[fedorov5549]

Pull spark plugs, charge battery, see if it turns over. If so, turn until the water is out pausing to cool the starter off once in a while. If not, might be rusted shut. Take to rebuild motor.

 

[WillieB]

Thanks guys,

I have done as you suggested with the plugs and it spins normally. Have put oil in the cylinders and spun, blowing some water and oil out. Doesn't the crankcase have to be completely dry ad clean in order for the mixture to enter the cylinders and fire and lube all the internal parts?

Thanks

 

[glockm22]

Don't do this job half way, just pull the motor, if you do have water in the crankcase and the motor runs and you THINK its ok the next thing that will happen is the motor will lock up because water isn't a good lubricant! Just pull the motor and do it right because if you don't you will be pulling it again anyway. And while you have it out the parts arn't that much go to denniskirk.com and get rings and gaskets for it anyway, with the age of the ski it won't hurt to freshen it up.

 

[fedorov5549]

It doesn't have to be completely dry no but mostly dry. You have to do this all at once so no rust happens. Pour gas/oil mixture down the carbs helps. I've done many of these and sometimes it can take 30 minutes or longer. Seeing as it is now 10 days after you first posted, looks like you might have some trouble in your future.