GTX 185 Max RPM 7000 Top Speed 59MPH

[Maximumquake]

I bought a 2006 gtx 185 a few months ago and it was finally warm enough for me to be able to take it out. the GTX 185 should get around 7600 max rpm and I am getting between 6900-7000. I weigh 220 pounds and with a full tank of gas I am getting 55mph max speed going against the current and 59mph going with the current. That is using GPS. The RPMS are low but the speed seems to be around normal for the SKI. This is what I have done to the ski so far
- New Solas 12/20 impeller and wear ring
- New carbon seal
- New spark plugs gapped at .028
- Changed the oil. The oil is within the marks on the dipstick. That is with the motor warm in the water.
- O.P.A.S delete
- The super charger was rebuilt by greenhulk 3 weeks ago.
- I just ordered a new set of ignition coils that I am waiting to arrive.

I have researched this alot and what I found when other people had this issue was the super charger, oil overfilled, something wrong with the jet pump, spark plugs or ignition coil. I have tried everything other than new ignition coils. I am out of ideas of what else it could be.

The ski runs very well, other than occasionally when I start it the RPMs will be low and it will stall. But it starts right back up. I also had it over heat on me today, which was very random. I had been running it for hours. The ski was running fine, I stopped to respond to a text message and I shut the ski off. When I put the DESS key back on the warning light was going off that the SKI was overheating. I waited ten minutes and it went back off, I started the SKI and drove it for another 2 hours without any issues.

Does anyone have any idea what would be causing this?

 

[skiasylum]

BRP engineers designed the open loop cooling system to use pump pressure to cool the exhaust. Pump pressure is created by pump RPM. Less RPM means less pressure, hence less cooling and at the same power output/normal wot speed , not enuf cooling at wot, eventual overheat. Your new solas impeller trailing pitch of 20 is the OEM pitch but who knows. There is a used OEM stock impeller on EBAY you might want to look at.

There is also three exhaust water aerators right before the muffler that could be partially clogged you could try cleaning but that will not effect your wot rpm.

 

[OverDoo]

I'm new to SeaDoo but not BRP. Is it possible the prior owner had the dealer put your machine back into break-in mode when he had the work done? Also, did you follow the oil check procedure exactly as it's shown in the owner guide - warm, then wait 30 seconds? It sounds like if you wait longer than 30 seconds, oil can drain to different parts of the sump giving you a false reading.

 

[skiasylum]

We wait the 30 seconds to give the oil a chance to drain down to the sump after running the engine to warm up the oil.

 

[etemplet]

The ski runs very well, other than occasionally when I start it the RPMs will be low and it will stall. But it starts right back up. I also had it over heat on me today, which was very random. I had been running it for hours. The ski was running fine, I stopped to respond to a text message and I shut the ski off. When I put the DESS key back on the warning light was going off that the SKI was overheating. I waited ten minutes and it went back off, I started the SKI and drove it for another 2 hours without any issues.

Does anyone have any idea what would be causing this?

Can't be positive what happened to your ski but an engine can overheat after running hard and shutting it off. The cooling water is not being circulated so the heat can't be removed. When you start it the temp will go down. This used to happen to us often when road racing motorcycles expecially on a hot day. I wouldn't worry about it unless it happens again while you are running. You may have a bad temperature sending unit or bad connection. As I said, I'd wait to see if it happens again and under what circumstances. Ride it like you stole it.

 

[Maximumquake]

I thought it maybe from not letting it cool down after running it hard. It has never happened again i have 25 more hours on it now. It was having low rpms due to the impeller. I put another one on and the rpms jumped up and it also started cavitating on take off. I am getting the exact same topspeed at 7300 rpms instead of 7000. The solas concord seems to have the same performance as the other impeller and the same top speed but at a lower rpm. So I put the solas back on