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The Zeeltronic CDI draws power at all times. It's supposed to be a minor draw but... Do you have and Electric Bilge Pump? Inspect the Switch and Pump.

'Tis the Season...

Okay, assuming there is no Current and only the Ski is moving: Water (Fluid) Dynamic Pressure is based on Momentum Formula 1/2 Mass x V*2 or 1/2 x Density x Speed Squared with Water Density in Slugs per Cubic Feet given rounded-up as 2 Slugs/cu. Ft. A Slug is a Unit of Force based on Gravity...

Go Yamaha!

Yes, there is a performance contradiction for Jetski Thrust optimization. A few Balls in the Air to keep track of... At low speed, we want a big Pump for slow incoming Water fed thru the Intake. But for high speeds, we want less Water/smaller Intake Duct and a smaller Exit Nozzle. Both can be...

Axial Flow (Jetski) pumps have large flow and low lift versus Centrifugal pumps have small flow and a high lift. Apples and Oranges. If someone would use their Ski to Pump Water at WOT into a known volume Container and timed the fill-up time, actual GPM readings could be obtained. No Jet Drive...

So did the new Start/Stop Switch Harness fix the problem 100%? What is the end of this Story? Need to close this Thread with a proper resolution....

A very simple way to figure the Water Pressure at the Pump Exit Nozzle is to guesstimate the height in feet of the Jetski Pump "Fountain" and divide by 2.3 ft/psi. Xample: Fountain is about 23 ft high, then Exit Nozzle Pressure 'tis about 23ft/2.3ft/psi = 10 psi If the Fountain is about 30 ft...

For GPM, let's grab the Kalkalata again. to do a very rough ballpark guesstimation... Due to direct drive, when the Engine rotates 6000 rpm, the Pump also rotates 6000 rpm (it better! o_O). So need to find amount of Water processed in ONE Revolution and multiply that by rpms to find gpms. Also...

Had done the Calcs before on previous Thread - she gone. Almost all my Posts (1000+) got deleted accidentally ...:( So Pete and Repete... Example: Kawasaki 750 SX: Stock Thrust = 550 lbs and Pump Diameter = 140 mm (the Kaw 750 SX is similar to Pump Size and Engine Power as SJ) Pressure =...

These Wedge-type Rear Sponsons make the Rear End lift and push the Nose down. Will reduce porpoising some. So will Rear Hull Extensions and a Longer RIde Plate. And the most expensive fix is the Pump Setback Modification. https://prowatercraftracing.com/product/superjet-wedge-rear-sponsons/...

Just a Stainless Thru-Hull Pad Eye https://shop.inflatableboatparts.com/product/thru-hull-tow-pad-eye-with-backing-plate-stainless-steel/ https://www.bosunsupplies.com/stainless-steel-pad-eyes/

Isn't that David Redinger?

Might contact Factory Pipe for a repair quote. https://factorypipewatercraft.com/ A new Chamber costs about $300 bucks at Wax Racing https://www.waxracingproducts.com/collections/superjet-exhaust/products/yamaha-chamber-fx1-superjet

To minimize the Whiplash effects of hard landings and high speed spills, the following Exercise Program is strongly recommended for a Wallop-proof Neck. Follow the Science. ;)

Weeks Brothers is working on a one-size-fits-all Plastic Shipping/Storage Protector (Shoe) for Yamaha-based Two Cylinder Blocks, specifically to protect the Sleeve Skirts from chipping or breaking during shipping. This is a Must-Have for those high-dollar Cast Aluminum Nikasil Sleeves on the...

Anybody know why this website is down? https://www.seadooforum.com/

https://www.gofundme.com/f/tyron-motzouris-medical-bills Please verify authencity of the Gofindme Account

I have the Driveshaft and Spline Lengths, but what are the Diameters for: Wave Blaster 1 Driveshaft 62E-45511-00 Diameter= ? SN 650 SuperJet Driveshaft 6R7-45511-01-00 Diameter= ? Are they the same Diameter? Do Splines match? Google Searched everywhere and No Joy. PwcToday was a dud...

If you have Money to burn: How about a Carburetor Service Stand :D Or a Jetski Stand with an integrated Engine Lift o_O