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New to me 97 Sportster

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Hello to everyone. Over the winter I took on a big project of rebuilding a 94 Seadoo SPX that had a seized crank. It was my first marine job, but I have been a mechanic for 11 years and have rebuilt car and motorcycle engines. After getting it running and enjoying it, I decided to look at the boats.

I found a great deal on a 97 Sportster. Drove about 2 hours each way, picked it up for $1700 with trailer, skis, cover, bumpers, ropes, about 10 PDF's and some more. It was the original owner and he had every receipt from when he bought it off the lot as a hold over in 98. Dealership put an engine in recently with very low hours on it. It runs great, just takes a bit to hook up and I'm not getting the speed I should, probably about 30ish.

The only question I have is regarding the impeller. The current one has some dings in it, but the wear ring is brand new. The previous owner had it changed the day I bought it because he sucked a rock up. Dealership said the impeller was ok but I can see slight dings and dents on the leading edges. I have purchased a 16/21 swirl for under $100 that has no damage. When I change the impeller, is it necessary to do the wear ring? I know they're usually done together, but seeing as I have ran it once since the new ring was put in, is there a chance I can keep this one?

I'll attach some pictures of how I bought it.






 
Nice boat.


No... you don't need to do the wear ring again. (assuming it's in good shape) Just swap the impellers, and you are good to go. FYI... the swirl impellers are great in the Sportsters.
 
Dr Honda why are the swirl impellers a good match with the sportsters im looking to replace soon :)
 
After all the threads praising them on this forum, I really wanted to get it. And since I could get the 16/21 for $100 instead of the $250 for a 15/20, and it was undamaged and barely used, I decided to do the same thing you did and grab it. I have been following this forum for over a year since I bought the SPX for $400 with the trailer and a bad engine. Just never really had much to post about.
 
I would like to find a way to swap the hood from my spx to the sportster it's just green at the moment. The spx has a dual gauge hood with mirrors. I have a tach for the sportster as well that I need to put on it.
 
After all the threads praising them on this forum, I really wanted to get it. And since I could get the 16/21 for $100 instead of the $250 for a 15/20, and it was undamaged and barely used, I decided to do the same thing you did and grab it. I have been following this forum for over a year since I bought the SPX for $400 with the trailer and a bad engine. Just never really had much to post about.

I'm eager to hear how the 16/21 preforms for you! Please let us know!!!
 
Dr Honda why are the swirl impellers a good match with the sportsters im looking to replace soon :)

They are the best at fighting cavitation, and have the best "Out of the hole" performance of any of the impellers made. Because of that... they make the single engine boats feel great.
 
Dr. Honda had a 16/21 swirl with shaved head if I remember correctly he saw above 45mph with 2 people on board. His posts are on here somewhere about the 16/21.
 
Iv been looking online and it seems everyone is using all different pitch and loving them but at 300 per id like to get more info hehehehe. wish there was more videos.
 
Have you contacted Dave at impros? Great guy and he may help you out on cost of you're buying 2. He can also get you in the right direction for pitch on that boat
 
It did awesome on vacation in lake george. Holeshot is much better. 38 mph with my gf and me and full tank of gas. That was on gps. I'm 180 she's 120.
 
My gf and I weigh about the same, full tank and decent size cooler I'm getting 41 on gps in calm water. Stock impeller, 40 hrs on sbt engine. Wanting to do an impeller upgrade over the winter, looking on here I'm seeing a few different suggestions for an upgrade. At this point im leaning towards a 15/20. I really don't want to loose top end speed but a better holeshot would be nice. Starting to think it's a tradeoff of one or the other. Do you know the stock pitch?
 
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