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An FP SXI dry pipe will make a big difference. The FP limited pipe is more better than the Coffmans when there is too much pump load. Its advantage is less with lighter loads. Get a Skat 9-17 swirl or a concord 12-18 with a 650 nozzle

There is not that much R&D to do. The builders have it easy, all they have to do is make a good looking hull that is short and fat. A plywood crate will backflip just fine with one of the big engines installed. The real work is in promoting the product. Buyers arent asking technical questions so...

Hopefully the pistons and busted case were replaced when it was still under warranty. I still have my early 92 piston with its paper thin skirt. The 93s were much thicker. A newer CDI will improve reliability and performance. A modern impeller and grate is needed for good thrust. If I seem...

That is a steel plug, they will get like that over time along with all the steel screws and clamps. Inspect the metering side, its more important. You are looking for debris and scaly deposits. Pull the N/S, its common to find a lot of deposits under it. Make sure everything is perfectly clean...

Wouldn't it have been easier to just mod the 650 hull?

ADA heads have no gasket to even out and direct the flow of water so the two outlets need to be connected together.

I used a static hydrolic load meter. I may make a pitot system for dynamic measurements.

They actually weigh less than any Superjet. No popular rider ever used a 650sx so they have no following like the 300sx does.

I chuck the hub in an aluminum jaw vise and use a heavy brass hammer. A harder vise/hammer will leave marks in the prop. Just raise the aft outer edge .1". It will appear to match the angle of the overlapping blade above. Go slow and take lots of measurements.

Bore your nozzle instead, the cone is a total waste of money. At least my tach, GPS, and thrust meter think so.

There is good margin but low volume. You are paying a lot for the basic assembly of the hull after its out of the mould. I would like to buy the parts (assuming high quality) and trim/fit/assemble the hull myself because I will do a better job than ANYONE trying to make a buck. I would hate to...

I guess Im the only one with a three cylinder about to go in a 650SX.

Your pipe will be noisy. Check the ignition timing and compression, they may already be too high for pump gas. See what impeller in installed, there may be some performance to be gained depending on what it has. It also needs a deep scoop grate for traction.

Doo Doo Brown

I remember Luther Campbell was always singing about pumping something.

Try drilling a hole in your head.

Solas does not make an impeller that is too low pitched so their lowest is still too high for best thrust. The closest out of the box is the "S" 14-17. The 13-17 concord is a little more load. Bore your nozzle with either and you will gain thrust without losing any speed.

They must have ran out of beer.

I you ever wondered what the difference really is, I did a case/carb swap last year and got some good test results. First with a stock 61X case/carb then to a stock 760 case/carb. Only the cases and carbs were changed, the cylinder, pipe, and pump were left alone. I spent some time with a gps...

Most used PWC parts are garbage.