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Tow valve is a different purpose, different thing. I do install tow valves on my PWC, but the valve is always fully open when riding.
...

There are thousands of these engines running in stock form. They run just fine even when ridden wide open for significant durations.

Polaris introduced the flywheel housing water jacket for the...

The tunes are not linked to your purchased license. The license is linked to the ECU when the tuner is first connected to your ski with the licence loaded.
This first connection creates the ECU VIN...

Not sure what you are talking about :smt102

The Polaris PWC engines are well cooled in the factory configuration. Overheating is just not a problem unless something is wrong or the cooling system...

My guess is either the EMM has failed or somehow the EMM signals to the two front ignition coil primaries are not actually arriving.

Trace (ohm check) the ignition coil primary wires back to the...

Welcome.

The long front driveshaft just pulls straight out from the impeller nose. The shaft might be binding on the rubber o-ring that seals the splines or the splines might just be tight. It...

Well, perhaps idle on one cylinder was not quite the right description.

If the Ficht engine will start and stay running on one cylinder but needs some throttle squeeze to stay running, that is...

There is the ‘figure 8’ rubber perimeter seal, and there is a the rubber seal for the thermostat itself.

http://greenhulk.net/forums/attachment.php?attachmentid=81236&d=1214106110
...

Is there a rubber ring around the thermostat rim?

Do you have another EMM you could swap in for a test?

What markings does it have?

The MFI tachometer signal on Yellow wire comes from the stator charging circuit, same stator coil that charges the battery. If the charging coil is not working the...

Well, what are the comparative wire colors on the aftermarket LR-505, which wire is ‘missing’?

Are you sure it is a 505 module?

The CDI module has nothing to do with the bilge pump nor the voltage regulator. If the engine is running properly then the CDI is working.

The LR-505 controls the bilge pump and voltage regulation...

Failure cause analysis can occur while the EMM is in for repair.

Sometimes the Ficht EMM just has internal component failure(s) that can short circuit the stator output and create large amp flow....

Which check valve is stuck closed, vacuum or pressure?

You might try removing it and cleaning the valve with some medium grade solvent.

Also inspect for possible vent blockage from a spider...

The 8K choice for Stage 1 PLUS may already be in there.
I forget whether it got added as a 'standard' choice across all the SVHO models and years.

There is a significant gain in engine power...

That suggests the EMM may/probably needs repair.

None of that pre-mixed oil in the fuel will lubricate any part of the engine.

The requested tune gets electronically linked to your tune licence code (encoded to your ECU ‘VIN’).

When the MaptunerX software (with your license already loaded) next connects online it...

You would buy and own the license. The code is delivered electronically to you.

The licence code is loaded onto the MaptunerX software at the shop and from there into their MaptunerX box. The...

Is the new stator genuine OEM or aftermarket?

Welcome.

If you dribble a tiny amount of fuel down each of the throttle body air intakes, does it start and run for a few seconds?


Note: Ficht engines MUST have the factory oil injection...

8000RPM limiter.

Target RPM would be couple hundred RPM below that, say 7850-ish.
Target RPM is controlled by the impeller pitch. *

At wide open throttle on smooth water the impeller pitch...

The hull wants to float when it is backed in far enough to get the jet pump intake fully submerged.

Unless the rear is strapped down it will drift side to side easily.

And if you steer...

http://greenhulk.net/forums/showthread.php?t=291506&p=3117016&viewfull=1#post3117016

Testing on the launch ramp...