Hi, I have a Little problem! I have a 325 HP and the water separator have a tire like stem on top, what is it for? my coach will not accelerate even floored.

I am just guessing,but it may be a way of bleeding off trapped air in the filter.

What brand and model of separator do you have? The separator does not come with the engine - it is added by the chassis builder. Therefore your separator is not likely to be the same as all other 325 hp engines.

I will check it in the morning and reply...thanks

OK the fuel filter is by "Winn" HF 12V I have a 1998 Dynasty and is part of the chassis you are right. I done some reading on it but still don't tell me what is the release stem for on the top of the filter.
I was wondering because I let some air out from it and the coach wont accelerate, getting on the freeway is down right dangerous.
What I have done so far after the trip is purging the air out with the control box provide it and as far as water the light is not on. I'm still parked so I havent test it air purging......