Pop off pressures PTO/MAG

[crazeejames]

Just checking my pop off pressure on a 787 1996 GSX. The Mag carb has a pop of 43psi, while the PTO has 23! They are technically within the spec for carb, my question is will this cause running issues with the ski? Should I try and get them a little closer by trimming the Mag spring?? The ski is missfiring and bogging at any thing above 3200rpm or so........

 

[Dr Honda]

Yes... they are technically in range... but for proper tuning... they should be close to each other.

I would check the needle and seat in the one reading low... and make sure they both have the same color springs in them.

 

[Dr Honda]

Misfiring and bogging at 3200 RPM....

By any chance are you using a "learning Key" lanyard??

 

[crazeejames]

learning key

What is a learning key Lanyard? It has the lanyard with the "chip", connect it and get the 2 beeps........and then fires up and idles nice..........its the lanyard I got with the ski.......but the previous owner bought the ski as good running and was having the same problems I am.........supposedly rebuilt..........I don't think it has ran right since the rebuild......I can still the the sealant on the outside of the cases with no dirt on it! I just finished checking the rotary valve, they may have been off by 1 tooth and a "fliip" of the valve.........

 

[Dr Honda]

Since it has the "Chipped" lanyard, SeaDoo offers a lanyard that tells the computer to only allow the ski to run to about 30 mph.

But now that I think of it... the learning key didn't come out until later. (2000 or so)

Anyway, when you do rework on the pop-off... I would double check the jets in the carbs, and blow out all the passages with compressed air.

 

[seadooya]

most "learner" keys are white. Make sure you take 3 test on each carb, for accurate/aprrox. pop-off, while lubing the n/s assy with wd-40.

Is your carb put ALL together, when doing the test?

Possible, the person who "rebuilt" the carbs, got some b.s. repair kit, which the "red tang" on the diaphram are too long, and hold the needle open. If springs are the same, you can compensate the "psi" by bending the "tang" either down/up to achieve close readings.