FX-1 FX1 runs crappy, no speed =\ Desperate! 100$ to whoever helps me find the problem.

F

flipflap

Location
Norway
Hi!

I cannot get my fx1 to run properly, I have a carb from atlanticjetsports that came with wrong jets. But have replaced them with the stock now. 115 and 135. Running a shiny silver spring and 1.5 n/s.

I have a feeling this is not carb related at all, maybe igniton. But im clueless.

It usually runns good the first minute or two.



I have already posted a bit about it on pwctoday, but it seems this is a bigger forum.

Any help is greatly appriciated.
 
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XJCrawler

XJCrawler

Location
Edmonton, AB
Sounds like it could be a bad exhaust leak or the check valve for your gas tank is toast.

Pull your check valve out and make sure you can only blow air through it one way.

If its not that, when your ski starts to run like :):):):) try riding it around with no hood. If that fixes it you have an exhaust leak
 
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F

flipflap

Location
Norway
Ok, will try! I cant try to run it without checkvalve, it needs it?

I am a bit scared to run it without hood, I tip over pretty often, this is my first standup. And have had exhaust leaks before, pretty sure its not that! Been smelling for it!
 
special fx

special fx

X
Location
Brigantine, NJ
Sounds like exhaust leak or maybe temp sensor.overheat condition. How long after it starts running poorly do you have to wait before it will run good again for a bit? If it's a short time (1 - 5 mins), I'd say exhaust leak. If longer, then maybe a temp issue.

Are you sure all cooling lines are good and you have a good solid sttream coming out of the bypass (pisser)?

Is the ski stock or do you have mods?
 
D

donteatdirt

Location
Lafayette,LA
Start with the easy stuff first. Check for water in gas, fuel filter for trash, check gas, cooling, and exhaust lines. If that doesn't help check compression. If nothing is wrong with the compression rebuild the carb with quality parts. Chances are its something simple!
 
F

flipflap

Location
Norway
Thanks for all the answers!


Compression is 140 and 150.

There is water comming out the pisser on the left side, not lots.

I have checked the engine temp with my fingers every now and then, feels normal!

There is a water leak somewhere, I get water in the filter before the carb every now and then!

I have tried with two different cdi modules, one pro-tec with the blue adjustable thingy and one stock. Both same problem... Running the stock now.

Only mod is primer pump and choke remove.

I have to leave it like 1.5 hours before it runs good again, but I am not very sure if its the time, its very periodic!

I have checked the carb filter, dont know how good the rebuild is... I have a pretty new original yamaha carb on my wb3, been thinking about borrowing that!
 
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Idok

Idok

F1pro
Location
Nations oldest muthaF+++kin city
sounds like you have a bad plug wire..then as things get hot the plug begins to short out......


try pulling off ONE plug wire, and starting on one cylinder.......then swap and see if one of the plug wires will run the engine




do the plugs look the same or is one darker/ligher than the other???
 
special fx

special fx

X
Location
Brigantine, NJ
flipflap said:
There is a water leak somewhere, I get water in the filter before the carb every now and then!
Click to expand...

maybe a dumb question, but did you loosen or remove the drain screw at teh bottom of the fuel tank vent trap? If not, it may be full of water and you're sucking water into the tank. I've always removed the drain screw on skis with the trap and on mine I remove the whole trap.
 
D

donteatdirt

Location
Lafayette,LA
Compression is good! And lines are clear? What color are the plugs? If they are a milky color you have water leaking into the engine. Also, I would replace the oem boots with msd boots. The stock boots are trash. Its a cheap upgrade that is worth it. I would make sure the " pretty new original yamaha carb on my wb3" is the same size as the one on your fx. Lastly make sure you have quality parts in your carb (made by the people that make your carb not aftermarket) carbs can be real picky.
 
F

flipflap

Location
Norway
Thanks again for all the answers!

I have been having some milky plug problems. But they are gone now. I think the fuel filler cap is leaking, but havent found the reason. My water trap / seperator had water in it earlier. I emptied it a few days ago.

The wr3 carb was ordered from boats.net so I am sure it has original mikuni parts in it. Its from a wra700s, fx1 has the same carb settings as far as I know.

I have been thinking a lot about plug boots. I have been having big nightmares with that on my wr3, but that was fixed with oem boots and lots of grease for electric connetions. The reson I have given up this track is on my wr3 the fault is so clear. I can almost hear the spark hitting the engine block instead. On the fx1 its different, and the plugs usualy look the same!

I have put crc and lots of electric grease in the boots on the fx1 to.

I really wanna do this for both my skies: http://www.jetskisolutions.com/p49_kawasaki_yamaha_twin_cylinder_plug_cable_replacement_service.html
 
D

donteatdirt

Location
Lafayette,LA
Best of luck hope you get it soon you are so close! oh by the way you can order the msd boots for around 13 $ all you get is the boots but that's all you really need. But if your wire is bad then i would go with what you where talking about. Milky plugs are never good get to the bottom of that 90% of your problem. My friends ski had a milky rear plug the ski ran but had no punch to it and virtually no top end. Ended up being the gasket between the exhaust mani and his pipe. Hook your ski up to a hose if the plugs come out clean its your fuel cap if not then I would start looking else where.
 
F

flipflap

Location
Norway
Whoho, finaly nailed it! It was the fuel tank selection valve!

I tried it on the docks with fuel in a coke bottle. Sounded like it ran smoother. So I connected the carb directly to the gas tank.

Cheers!

I tried with my wr3 carb today. It has golden spring. I dont understand anything about these carbs configurations. Fx1 and wr3 has the same carb partnr.

fx1 carb: 61X-14301-01-00
wr3 carb: 61X-14301-01-00

Why dont they have the same spring? Does anybody know the different stock springs? And jets?
 
L

LeftysRule22

Location
Austin, Tx
Stock FX-1 carb specs are: jets - 115 and 135, 1.5ns, and 115g gold spring.

The other springs are silver - 95g, black - 80g, and polished silver- 60g if i remember correctly. People throw lighter springs in the carb for lower popoff pressure when using a/m air filters and exhausts.
 
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