2009 Sea Doo Gti 155 Se
- #7
Hi Jacks and welcome to the forum.
You can search for cavitation in the forum. it's basically letting air flow by the impeller instead of 100% water. Check the wear ring for gouges, tears, etc. Also look at your impeller, (get under the ski or pull the pump) for nicks, bent blades, etc.
I believe the clearance between the ring and tip of blades should be no more than .040"...check it with a feeler gauge, unless the 2011 models are different.
good luck and have fun.
OK, you say it takes off just as well as your friend's ski.......so it could be a different issue then.
- #9
If you become a premium member you can download one for free on the forum. but it's tough to take it to the garage with you unless you print 400 pages, but bringing a lap top is possible.
Try amazon or a dealer...Seadoo manuals can run $60 -$80. Some people have a Clymer manual but it's not recommended by the experts here.
- #11
If it runs fine till it hits 3/4 throttle, thats is odd. You sure you arent using a learner lanyard? My friend has the same ski and on the dream o meter it hits 58-59.
- #12
I have an older gtx and Found that it is possible to program the keys, and I was told my yellow performance key was good but really it was programmed for a trainer key accidentally. Have the dealer reprogram your key and retry it. Or if they can check it and tell the difference. That was my problem. Anyway good luck.
Andy
- #14
if its not the key
it sounds like the wrong prop,
full RPMs not enough bite?
you wonder if some one snatched the prop
before you got it.
Last edited by a moderator:
- #15
key is fine, learner key will say l-key on display like you mentioned.
He doesn't have a dream-o-meter. He has a gps based speedo and they are dead on.
What I think is wrong is a slight air leak in the pump causing minor cavitation. If your getting full rpms, the proplem is in the pump system which is not causing it work properly. Could be the carbon ring driveshaft seal which is not quite sealing. Have your dealer check it.
Or, could be a pump seal problem seen more on the seadoo boats even brand new from the factory, the pwcs is not usually a problem. The airleaks are difficult to find so I suggest having your dealer remove the ride plate and reseal everything. Not a difficult job and only takes an hour or two.
Make sure your dealer actually rides the ski. This type of problem is impossible to solve unless you are actually full speed lake testing.
- #22
If you are in eco mode it will top out at 45 .Make sure you are in touring mode or sport mode.. My o2
- #24
If he's getting 7500rpms and only going 45mph, the key isn't the problem, it's the pump system. All learner/rental keys limit rpms which is how it keeps the speed lower.
I doubt it has the wrong impeller, but anything is possible. Any reputable dealer should be able to fix this problem in a few hours.
Source: https://www.seadooforum.com/threads/2011-seadoo-gti-155-se-top-speed-is-only-45-mph.45199/
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