'05 Speedster 200 - holeshot question

[porshuh]

Hey everyone,

I've owned my '05 Speedster 200/370hp for a few weeks now, and have had her out quite a few times and absolutely love it.

If I quickly get on the throttle from a stop, I notice that the right engine shoots up way higher than the left...almost like it is not engaged or something. The left one seems to dig in appropriately...it jumps up in rpm, but doesn't seem to over-rev like the right side engine. The two tachs seem completely inaccurate, so I'm not sure what rpm the right is actually getting to, but my point is that the right side just seems to jump up effortlessly and much higher (too high) in rpm than the left side. Is this something I should worry about, or is this a condition that regularly happens?

The boat seems to pull like a beaten mule, and tops out at a gps indicated 56mph (does this seem correct for a 370hp model?)...so this holeshot over-rev on the right engine has me pretty curious.

Which leads to my other question. I typically cruise at an indicated 5000rpm or so, and every now and then do a 15 second goose up to full throttle. It seems when I slide the throttles to max, the two tachs only indicate about 7000rpm. Shouldn't that be around 7500rpm? Or is this just another case of the tachs being more or less completely useless? The boat definitely gives you a kick in the pants when you floor it...but I'm curious if the engines should be revving a little higher for potentially another mph or three.

Thanks for any input!

 

[RFoster130]

These tachs are notorious for being bad. Buf if it has a supercharger that isnt working properly, it also wont hit full rpm. The side shat shoots up in RPM probably needs a new wear ring in the pump. search around here for wear ring and you will see everything you need to know. It is an easy do it yourself repair. Will make a noticeable difference. Your speed sounds about right so i wouldnt worry.

 

[twinpartners]

I agree with RFoster130. It needs a new wear ring. While you have it out go ahead and replace the bearings and rebuild it. I am doing mine right now. Check the clearance between the impeller and the wear ring before you pull it if you want to make sure. You can also compare between the "good" one and the "bad" one. Shouldn't be more than a business card thickness between the impeller and the wear ring. If you can fit anything thicker than, say, a credit card'ish...then you need a new wear ring. Cavitation always a big problem with jet powered boats/pwc, but once you've experienced it (and rebuild your jet pump), you'll be a little more careful when out playing. I hit a bed of sea shells while running in shallow water here in Florida. Dumb mistake on my part...and now I'm paying the price. When I looked in the back to see what was wrong...I had a sea shell stuck that rubbed a big @ss grove into the wear ring. Now, it takes forever to get to plane and I can only run about 35 knots now. Engine runs great, no lights on the dash, no overheating, no bells, jet pump kicking waves, no problems at all. Except that I am at 7000 rpms and standing still. Sounds like the same problem on your "bad" side.

 

[porshuh]

Great info. Thank you both.

Is there a good place to get the wear rings (I guess I'll go ahead and do both), bearings, and anything else I need to do the complete rebuild?

How about a good write-up with pics? I'll search around here...but didn't know if there was a clear winner as far as instructions go.

Thanks again!

 

[RFoster130]

Stick to the sea doo oem rings, not the cheaper aftermarket. There is a good write up here DrHonda did. Look in the how to section for it.