785 Revs on trailer not in water

[785 Pro Mick]

Just picked up this over the weekend. Runs fine on the trailer, in the water it is a slug. I noticed the PTO cylinder seemed to be cold as the MID and MAG cylinders would heat up when running on the trailer. I removed the carbs and found that the reeds for the PTO cylinder had a gap where the others did not. Could this be the problem?? I have spark and 180 Lbs of compression thru the cylinders.

[rgard32]

a gap...shouldnt be a gap.....can u take a pic?.....also 180 psi=race gas .......describe what u mean by a SLUG....is it slow? no power at all? take off ok then goes slow?? be alittle more specific..thanks

[785 Pro Mick]

Yes, race gas is run. My max RPM in water 5800. Will not rev in water.

[rgard32]

oh 5800 ok lol....have u checked to see if the valves are opening all the way?

[rgard32]

unplug the actuator and do this

[785 Pro Mick]

Valves open. I have done these checks and are looking into other problems. If it is not the reeds, i am assuming i have a leak in the exhaust that is causing the problem.

[rgard32]

didnt know you have done all those checks before......reeds shouldnt be open....problem 1...but i dont think its your rpm problem...i would look for an exhaust leak like u said.

[beerdart]

How are the pump bearings?

[rgard32]

and are u gettin spark on ALL 3 cylinders....5800 sounds like 2.when it should be 77-7800

[Polarisracer166]

You may want to check the timing. If you have spark in all 3 cylinders and everything else looks good.. It may be time to replace the flywheel key...