Max rpm question

[Matyy4]

Hello all,

I had my 2004 speedster 200 out last weekend on the lake. It started and worked perfect as usual. We cuised, tubed and skied with it no problems. At the end of the day I took it for a full speed run across the lake it only hit about 37mph on the speedo, but I don't trust that any way. I didn't have the gps hooked up to verify the speed. My question is, it only ran about 7000 rpm (7100 onto the starboard engine). I thought that I had read they should open up to about 8000 rpm some where on this site.
On a side note I replaced the wear rings and put new solace concord impellers on this year, it has only had about 3 hours on it since then.
I also changed the oil. When it was sitting level on the trailer the oil was exactly halfway between the marks on the dip stick. When I check it in the water now it seems to be almost to the top mark.
The boat works great and I almost never run wot so it's really not a problem for me just wondering if I have an issue here some where.

Thanks in advance for any input, I love this site!

 

[JPass]

Did you happen to change the pitch of the impeller when you replaced the originals?

 

[Matyy4]

Did you happen to change the pitch of the impeller when you replaced the originals?

Well this sounds stupid, but I'm not sure. I bought it aftermarket (obviously) and it was the recommended pitch for that year and model. I don't know what the original pitch is. I believe this one is 11/19?? I'll have to check on that.

 

[Matyy4]

Yes, it is an 11/19 pitch. So should I be reaching 8000 rpm, or does 7000 sound right?

 

[JPass]

I'm not sure what RPM you should be reaching, but if the new and old impellers are the same pitch, then yes you should be seeing the 7800-8000 rpms. If the new impeller has a different pitch, then that very easily could be the problem. What is the pitch of the original impeller you replaced?

 

[pete63]

II/19 is correct for a non sc engine.
check;
air filter, clean replace.
throttle body, check and clean inside
spark plugs, injectors, coil.

 

[pvamax]

Twin 155 motors right? Spec for them is 7300rpm per seadoo as I see it.

 

[Matyy4]

Thanks for all the replays,

It is the twin 155s, I should have mentioned that sooner. I guess I am pretty close to my max top end than.
I changed out the plugs when I did the oil change. I will check the air filters this weekend and clean them. Maybe I can get that last couple hundred rpm out of it. Also I will check my speed with the gps. It felt pretty fast ( I never did trust the speedo).
I guess my issue was a non issue after all. I like an easy fix!!

Thanks for every ones help.

 

[pete63]

Twin 155 motors right? Spec for them is 7300rpm per seadoo as I see it.

limited max 7650 rpm