Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

[flyhigh]

I have a 2000 Seadoo GTX DI 947 engine that will not get max RPM. At full throttle I will get 6000 rpm, when I remove the Rave valve spring from both valves I get 6600 rpm. I have cleaned the Rave valves and check the o-rings. With the spring back in and the Rave cap adjusted all the way out, I'm still only getting 6000 rpm. I checked the pressure at the Rave valve housing and I'm getting 7.5 psi pressure at full throttle, is that enough to raise the valve and spring? Do I need to replace the Solenoid? How much pressure should I get at the Rave Valve housing at full throttle?

[dsolie]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

6000 RPM sounds like a possible fuel pump issue (common for the older DI's)..

I would take it to a dealer and have them do a fuel pressure check to make sure that's not the culprit first.

[flyhigh]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

If it is a fuel problem, then why do I get max rpm when the rave valve spring is removed?

[dsolie]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

max RPM is not 6600

[flyhigh]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

Dan Solie,

Thanks for replying - what is MAX RPM for this Seadoo?

Can anybody check their pressure from the Solenoid to the Rave valve housing. Mine is 7.5 psi and it will not raise the valve with the spring installed.

[dsolie]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

7200 +/- 50

[skisol]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

Dan read his first post again, by removing the springs from the rave's he gains 600 RPM so he definately has also a problem with his rave system, I agree that his RPM's are still to low with 6600 RPM.

You should also do a fuel pressure test on this unit.

[flyhigh]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

Thanks Dan,

I guess I've got other issues with this unit because I don't get anywhere close to 7200 rpm.

[dsolie]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

Ahh.. yes... Thanks Ski..

When you press the raves up by hand, do they feel equal as far as pressure to move them up? When you let them go, do they SNAP back, or do they slide back down.

In the water, you will never see 7200 (unless you are cavitating, or become unhooked). You should be seeing 6950-7050 though.

[flyhigh]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

Dan I pulled the caps off and removed the spring and with my finger tips I am able to pull each Rave valve up and down freely. But when I pull them up they stay up I have to push them back down. I guess that's why they need springs to keep them down until the higher rpm.


With the springs out I get 6600-6700 and when I cavitate I will get 6900 rpm.

[dsolie]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

I just went out and checked mine.. If I pull mine up, they go back down by themselves..

[flyhigh]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

Dan is your Seadoo a DI or a carburetor model because they are different. The carburetor models have a bellows were the DI models just have o-rings. Mine is a DI model.

[dsolie]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

Good call.. Mine is a carb'd.. So, I just went out to the shop and pulled my buddies off his RX-DI.. same thing, goes back down.

[flyhigh]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

Ok, Dan

I am going to tear down the Rave Valves and check o-ring, valves, valve springs, everything.

Thanks.

[astral]

Re: Seadoo GTX DI 947 eng. Rave Valve Housing Pressure?

The rave valve is controlled by a solenoid on di models ..
if the solenoid is not working it will not open the valve.
If it is connected incorrectly it can also open the valve on low rpms..
check the air compressor for proper psi..
sounds like its not putting correct air pressure through the valve.
Or there is an air leak.