We have a pair of 1994 Raiders we have had for ever and never had any problems. Took them out for the first time this year one ran fine the other would start and idle but die when you hit the throttle. So I figured the carbs needed rebuilt , pulled them off tryed to get parts local (Cincinnati) no luck. So I decided to pull them apart before I ordered on line. Took the covers off the diaphram side one was stuck to the cover. so i figured this may be the problem. sprayed some silcone lube on the cover and put it back togather, Runs fine now. Thought this may help someone . I have not ever heard this before. Going to do a carb rebuild on both ski's at some point. This saved some down time for now