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inspect the plugs. Black, fouled, wet = rich. Dry, grey= lean. You want chocolaty brown.

I dont have the part numbers but any seadoo parts dealer can look up the gaskets by year and model. Same for the needles and seats. But here’s what i used for determining what needle and seats i needed http://seadoosource.com/carbreference.html

Ive always thought of these engines like chain saws (85 hp chainsaws). They are very different from the two stroke outboards i have worked on. But that’s a good analogy. Contrary to popular opinion, i do take care to use the correct oil. At 32:1, you should be smoking the neighbors out of their...

Try 1/8 turn to the right (open) for each low speed adjustment. Run it for a long time before making any more adjustments. Adjust the idle with the idle adjust screw on the mag carb. Pull the spark plugs and observe per the service manual. My 717 runs best at 1-1/2 turns from closed on the low...

Steering is almost guaranteed to be a bad cable. My single engine sportster has one steering cable. Speedster has two. The cables attaches to the steering hub in the console, runs through the hull, and penetrates the hull near the pumps. You will want to reseal that. And keep it lubed...

I did not know the speedster had a rev limiter. On the single engine sportster (95), the rev limiter is mechanical. You cant push the throttle forward by more than about 20% in nuetral. Anyway, there is a troubleshooting guide for the speedster. It says to check rpm limitation function, run the...

Put it in the water and drive it like you stole it. The engines run different in the water then on the trailer. Mikunis are weird compared to every other marine carb ive rebuilt

I have the 14.5 sportster. It doesnt take much. I use a plasti-dipped 20 lb anchor from walmart (which is probably too much). I have some of that 3/8” poly rope from harbor freight. It floats. I once broke down and dropped anchor to wait for a tow. I had 3 people on board and it was windy. I let...