Just doesn't have the RPM's

[slowboatn]

I tore the carbs off my 98' GTX Limited w/ the 947 carbs. I put new larger jets in them. Cleaned them up real well. I replaced the fuel hoses last year. I have flame arrestors on them. I brought the ski to the water and set the idle. I set the low and high speed needles to what I've been told by the experts. MAG lo 1 1/4, high 0; PTO lo 1 1/4, high 1/4. I'm having a hard time starting it and when it does start it will run if I hold the throttle. Has to warm up. When I first took it out it ran great. I was at 6500 RPM's at about 50 to 55 MPH. Today I took it out and it was like 4600 RPM's and just barely over 40 MPH. Is this an accelerator pump problem or something else? I need help with this. Any ideas would be great. I'm down here w/ nothing to ride now until I get this right.

 

[slowboatn]

I just woke up and am fixing to go work on it. So if any one has any ideas please let me know.

 

[timmyboy76]

slow...w/ arrestors on, did you lower the pop-off...2.0n/s w/ black 80gm spring.

Also, clean the raves, check the water regulator..

 

[slowboatn]

What do you mean lower the pop off? I cleaned the raves before I brought it down here. They were missing parts and I had to rebuild them. Where is this water regulator at? I'll look in the manual and see if I can find them.

 

[slowboatn]

I found it. Looks like the RAVE valve for the exhaust. Why would that cause problems? I found out the speedo is wrong or messed up. Had brand new Yamaha out with me and they said I was doing 65 and my speedo said a little over 40. Both the digital and mechanical ones. I'll get to it soon enough. RPM's are good. So it must be something else.

 

[timmyboy76]

what was 65....rpms or mph...if thats the case, leave it alone, there aint nuth'n rong, if ur turning 65mph.

 

[slowboatn]

That was yesterday. Today it maxed out at 52 or 57 MPH. I'll have to go look. The weirdest thing is when I let off the throttle the RPM's will stay at 2k. I have to blip it and it will come down. I think the idle is too high. I'm going to lower it. Besides the digital meter and the analog meter, how can I check the RPM's?

 

[slowboatn]

timmyboy where are you?