In this video I explain how the RAVE valves work and then do a rebuild to show you how its done. Resurrecting a Seadoo 97.5 GTX Limited aka the Gray Ghost. This was the first year of the big 947/951 Rotax Engine.
Пікірлер: 24
@2-smoke2 жыл бұрын
Great information! Thank you. I like the advice about using some grease on the bellow. Like you mentioned, those green bellows are stiffer than the oem red ones. I believe they also added updated springs that need to be used with the green bellows.
@jonparkmac2 жыл бұрын
Thanks for that tip on the spring ..I didn't know
@MrMr.SmithSmith2 ай бұрын
Great video! Your hand wounds look like mine 90% of the time. lol :)
@jonparkmac2 ай бұрын
Lol I'm pretty accident prone like that. I try to wear gloves more often when working on stuff
@stroker936 ай бұрын
My old 670 ho motor has a spring steel wire clamp(similar to fuel line clamp) holding small end of bellow onto shaft...I've had many Rotax engines over the years, I've seen zip ties....safety wire...spring style... My bellows are the black stiffer ones, not sure if original or aftermarket...
@jonparkmac6 ай бұрын
I've pretty much settled on zip ties and file the corner to round it out so it doesn't poke a hole in the belows like the OEM metal ones do
@syclone1012 Жыл бұрын
Bought 2 2001 RX DI's and when I pulled the motor/ top end, i found that these RAVE valves were catching the piston like you said. So must have been bored. Now i'm looking for a person or engine to replace.
@jonparkmac Жыл бұрын
Peter at Fox Valley is one of the best in the biz. He rebuilds these daily and very good rep g.co/kgs/PaSJcS
@jonparkmac Жыл бұрын
Sadly it's a common oversight to not trim those guillotines back 1mm.
@soinic27 Жыл бұрын
i lost my small spring, any recomdations on how to get a new one or if I even need one?
@jonparkmac Жыл бұрын
You can try eBay or .. I used a zip tie
@jeremymurray9805 Жыл бұрын
If these are bad,could it cause the motor to bog down on acceleration?
@jonparkmac Жыл бұрын
Maybe but usually when they stick you lose top end power band ..like can't get 5500 rpm sort of thing. Bogging is usually a fuel delivery issue and often because the carbs need to be rebuilt
@jeremymurray9805 Жыл бұрын
@@jonparkmac my ski is fuel injection
@jonparkmac Жыл бұрын
Ahhh. Not the carb then I guess lol. I'm afraid I don't know much about DI/RFI. I've heard people talk about low fuel pump pressure ..which I could see.
@user-qz1qr8gf5b Жыл бұрын
Mines messing up too bogging on wot ... Then its fine . ... Putting old green ones back on Tom.
@oldkoot5828 Жыл бұрын
I lost my compression spring when I pop the cap. Im an idiot.
@jonparkmac Жыл бұрын
I did that too. Looked over the floor for an hour. It had fallen down near the manifold. Check there
@yurimantegazza406511 ай бұрын
Il mio Rotax 787 ha difficoltà di accensione la causa potrebbe essere questa valvola?
@jonparkmac11 ай бұрын
@@yurimantegazza4065no the valves are only for tuning the power band and nothing to do with starting or idle
@yurimantegazza406510 ай бұрын
@@jonparkmac ok. Thank you 👍
@yurimantegazza406510 ай бұрын
@@jonparkmac What should I do to solve the problem of difficult starting?