Search results

You may need to lighten the pump load with the dry pipe. Adding water will lower its operating rpm.

Does anyone actually know it it beats Supertech??

Well, I already know what jets to use so what else is left?

I know, I went in 2003 and it was all long skis doing 50 rolls in a row.

No flips?

Twostrokes run narrow gaps and rich mixtures. This environment does not place high demands on the spark plug. A modern car ignition has 3X the energy and large gaps so they can run very lean without misfiring. Exotic metals make the plug last 100K miles. FYI, NGK made a fine electrode version of...

If you remove the screens it won’t work as a flame arrestor.

The full length hull will do barrel rolls and hood tricks. That engine and pipe may make good power provided the pump load is set correctly. The ski is old and should be completely disassembled inspected and repaired.

I wish the typical jet skier was more advanced. They would likely stick around longer and not be so cheap on maintenance.

The old oval K&Ns had a fiber element that constricts then it gets water on it. They make watercraft flame arrestors without the fiber. I guess saying that they suck would also work but at least you know why.

But they’re so cheap! That’s all that matters.

You must tune the main circuit rich enough to reduce power for a couple of tanks. All large two strokes struggle with high combustion temps.

All Solas 144 yamaha impellers tend to have a lot of load . They do work very well once you get the pump matched to the engine. Pay attention to throttle response, if it takes more than a second to reach full power it needs to be pitched down.

The 12-18 concord needs to be pitched down.

They lighten the pump load and let them run more RPM.

The tech and parts already exist, go for it.

Can he provide any pictures of the ski before he made it pretty?? It could have been damaged and poorly repaired. Saying the engine was overhauled means nothing unless you can see it has a perfect new OEM crank. Those heavy Riva pipes work well but aren't desirable. There are a lot of poorly...

No large mfg ever served this aspect of watercraft. They can’t because of reliability issues caused by large displacement cylinders and poor owners.

Any twostroke with a tuned pipe will get an almost instant power increase when the pipe starts working.. Power is very broad and smooth without a pipe. The typical pipe starts working around 5000rpm where little thrust is produced. RPM and thrust will rise almost instantly after that. This...

Make it sputter around 1/4 throttle with the pilot and make it rich of peak RPM at full throttle with the main jet/top screw. Thats (about) all there is to carb tuning.