Thread: 05 RXT Issues and questions
12-06-2013, 05:36 PM #1
- Join Date
- Nov 2013
05 RXT Issues and questions
I have a 2005 RXT with 120 hours on it...The supercharger is original and has not been rebuilt...I have a few questions related to performance and the supercharger.
1. This past year it was sitting in my garage and not run for about 8 months. The fuel went bad...I took it out and it would not go over 3000 rpm and about 7mph...
2. I have used fuel/injector additive in the fuel
3. Ran a full tank of ethanol free fuel and it finally (after a few hours) runs up to about to about 7000rpm and 40mph...The engine seems to runs ok...It does seem to sputter a bit when punching the throttle from idle.
4. I assume that my supercharger was bad because of the limitation of power/speed.
5. I just removed the supercharger and it seems to be fine...It spins ok...I just want to make sure that the ceramic washers did not go...Want to make sure that my engine does not have to be cleaned up from disintegrated washer debris. How do I know if the ceramic washers disintegrated?
6. I plan on sending the supercharger in for rebuild.
7. What other reasons would my engine be limited in performance (limited to 7000rpm/40mph)? Plugs?, injectors? Supercharger?
8. What other maintenance items should I check or do now that he supercharger is out to keep this ski running at it's top performance?
This ski has been in my garage and taken care of, but I have not done any preventive maintenance other than change the engine oil or replaced the plugs. Any insight would be appreciated...Now that I have the supercharger out, I want to do everything I need to get it running right again.
Last edited by Miketran; 12-07-2013 at 07:30 AM.
12-08-2013, 01:10 PM #2
Your supercharger is extremely overdue for a rebuild. They need to be rebuilt every 100 hours, or every 2 years.
Since you have removed the supercharger see if the gear will move back and forth on the shaft. If it does one or more washers are missing.
More than likely the cause of your low RPM/sputtering is spark plugs. You need to change them at the beginning of every season.
This handy kit from Sea Doo has the proper oil, oil filter, O rings and Spark plugs for your engine
12-08-2013, 01:17 PM #3
- Join Date
- Jan 2010
I would do a compression check and remember to hold the throttle wide open when pressing the start button. This stops ignition and fuel flowing through the injectors. As its a 05 you need to check if the exhaust valves have been changed to new type. Old type have a 72 on upper valve stem. If the break the could write off your cylinder head and block.
12-08-2013, 01:36 PM #4
- Join Date
- Aug 2011
Wow your lucky as Jerry stated your way overdue on a rebuild.
The valves are prone to breaking and wrecking havoc on the engine
it also think 04-05 had the shirty flywheel bolts as well
If your going to tear it apart wouldn't hurt to do a full valve train upgrade, head bolts, rocker arm bolts, flywheel bolts, head gasket, pto gasket, charger rebuild, new fluids, new plugs, and quality fuel.
you are very lucky if those washers didn't let go
If you plan on adding horsepower and changing the charger I'd look into the rotax racing head jet, and o8 oiler mod. Not sure what your plans are, just tossing it out there.
12-08-2013, 01:39 PM #5
DOOO NOT RUN IT ANY MORE WITH CERAMIC CLUTCH WASHERS!!!!
Send it in to jerry for a full rebuild washers and bearings. Your extremely lucky if they haven't broken already.
+1 on the spark plugs. Even if they look good replace them after the 1st tank of the year.
12-10-2013, 10:20 AM #6
- Join Date
- Nov 2013
Thank for all of your responses...
1. I will definitely have Jerry rebuild my supercharger...I am amazed that it has lasted...It actually looks like it's in good shape...I bought this ski new in 2005...Washers are still in place and look fine...I just assumed I was screwed and the washers would be in my engine...My dealer changed the oil...Maybe the oil I was using was not synthetic and that's why the washers did not go? See the photos below...
2. Regarding the performance...Yes, I agree, it's got to be the plugs...I have not changed them in a while, and all that I have read points to the need to change the plugs every season.
3. Ok, since I have the supercharger out and I want to update this ski to prevent catastrophic failures in the future, if I do all what thatdude596 suggests, what will the estimated cost be for the parts, if I do the labor? Any idea?
4. If I am on a budget, what would the recommended order cost/benefit be for those upgrades? Valves seem like #1...but what else should I be concerned about?
5. I am engineer, not a mechanic...So I would be getting help from one of my engine rebuilder buddies...Is this work difficult to do, or routine for an experienced engine mechanic? Just trying to gauge what kind of project this is? Could it be done on a Saturday if I had all of the parts?
Thanks guys...your help is invaluable!
12-10-2013, 11:24 AM #7
Hi Miketran, glad to see both of your washers are intact.
Here's the recommended parts for the head
best choice are the ARP
rocker shaft bolts
It's also a good idea to upgrade your flywheel bolts
you will need a new PTO housing gasket if you change the flywheel bolts
Hope that helps!
12-10-2013, 11:29 AM #8
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