Rave valve leaks

[dorseya]

I own a 97 sea doo spx that has a 787 engine. The Rave Valves leak a black oil substance. Is this a major problem? If so what should be done to fix this problem?
Thank you for your time.

[Bill O'Neal2]

Re: Rave valve leaks

I own a 97 sea doo spx that has a 787 engine. The Rave Valves leak a black oil substance. Is this a major problem? If so what should be done to fix this problem?
Thank you for your time.

If it leaks excessively, even after you rebuild the rave valves with new orings and diaphrams, then you probably have a leaky needle valve inside the carbureators or some really bad sparkplug wire connections, as you are not burning off all of the fuel in that clyinder, and the unburnt fuel is being pushed up and out of the rave valves.

In extreme cases, the rave vlave slot in the clyinder, the shaft of the rave valve and the hole in the rave valve base assembly gets worn out to the point it is too sloppy and allows mixed gasses to pass it and fills the diaphram, then leaks out.

It is usually caused by poor engine maintence.