half throttle brap, full throttle blah on a limited setup help please

masterblaster

masterblaster

X-H2
limited setup surf boat,carbs just rebuilt,cdi replaced,stator coil seems to ohm out perfect,if you give it full throttle it pretty much bogs out or dies,if you give it quick half throttle blips,it seems to almost hit the limiter really clean.any ideas what this could be?
 
Crab

Crab

thanks darin...noswad!
Location
Seattle
You said the carbs were just rebuilt, I have seen times where that has caused some people touble if they put in the wrong gasket or accidentally missed something. In one case, one of the gaskets in the slave carb pump side was not punched correctly.
 
masterblaster

masterblaster

X-H2
ill have Mark post up bout the carbs,since he was the one who rebuilt them,the ski was starting to have this problem,then they were rebuilt and the problem has only seemed to get MUCH worse
 
masterblaster

masterblaster

X-H2
Mark said he had carbon reeds that looked like they were gaping a little so he flipped them over,so they are in good shape. We are 0 for 2 on that theory so far Brian
 
beachedflunkey

beachedflunkey

wavejunkies
Location
Virginia Beach
This is my old ski. The dual 38's worked perfectly on this magoo port 701 when I removed them 14mo ago or so (for dual 44's). I put them back on right before Daytona in Jan. The ski bogged a little out of tailstands but that was it. Then the next ride at Sebby it got progressively worse through the ride. So no, it's not the jets or the mixture settings.

Anyways. The current issue is, I can ride it around fine if I constantly blip the throttle. The problem rears it's ugly head when you gun it anywhere from idle to just about half throttle. It feels like it is loading up. Sometimes it will die after a couple seconds, sometimes it will gurgle for a couple seconds and take off, sometimes it will gurgle for several seconds until I let off. Once it's up 3/4 throttle it is mostly fine. It seems so inconsistent that I was thinking cdi. I had also tried high and low mix screws up to 1/2 turn either way with little to no difference in performance. Sometimes it exhibits this problem out of the water also, just not often (even when the ski has been dry for several days so probably not salt water related).

Things I've checked:
  • Cleaned carbs
  • Rebuilt carbs pump side and diaphram side
  • Rebuilt carbs again and removed jets and sprayed carb cleaner through them
  • Flipped vforce power reeds for a fresh seal (fiberglass not carbon) (inspected good, but maybe missed a crack somewhere?)
  • Compression at 195psi both cylinders
  • Drained gas tank and shop vac-ed
  • Replaced fuel filter
  • Replaced spark plugs twice
  • Replaced msd enhancer with stock 61x cdi (62t motor)
  • Sprayed down coil wires with that rubber stuff in a can
  • Put spacers between coil wires
  • Tested resistance on stator pulse and lighting wires, tested good.

I'm kind of in the process of selling the ski to torr and he doesn't have any more time to mess with it than I do, so Wilkey/lovin will be messing with it from here. He's offered to swap in spark plug boots, a coil, his known good dual 38's, and possibly a stator to narrow down the problem and just continue to throw parts at it from there. Any other ideas?
thanks,
mark
 
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Mike W

Mike W

Infidel
Location
North Florida
beachjunkey said:
This is my old ski. The dual 38's worked perfectly on this magoo port 701 when I removed them 14mo ago or so (for dual 44's). I put them back on right before Daytona in Jan. The ski bogged a little out of tailstands but that was it. Then the next ride at Sebby it got progressively worse through the ride. So no, it's not the jets or the mixture settings.

Anyways. The current issue is, I can ride it around fine if I constantly blip the throttle. The problem rears it's ugly head when you gun it anywhere from idle to just about half throttle. It feels like it is loading up. Sometimes it will die after a couple seconds, sometimes it will gurgle for a couple seconds and take off, sometimes it will gurgle for several seconds until I let off. Once it's up 3/4 throttle it is mostly fine. It seems so inconsistent that I was thinking cdi. I had also tried high and low mix screws up to 1/2 turn either way with little to no difference in performance. Sometimes it exhibits this problem out of the water also, just not often (even when the ski has been dry for several days so probably not salt water related).

Things I've checked:
  • Cleaned carbs
  • Rebuilt carbs pump side and diaphram side
  • Rebuilt carbs again and removed jets and sprayed carb cleaner through them
  • Flipped vforce power reeds for a fresh seal (fiberglass not carbon) (inspected good, but maybe missed a crack somewhere?)
  • Compression at 195psi both cylinders
  • Drained gas tank and shop vac-ed
  • Replaced fuel filter
  • Replaced spark plugs twice
  • Replaced msd enhancer with stock 61x cdi (62t motor)
  • Sprayed down coil wires with that rubber stuff in a can
  • Put spacers between coil wires

I'm kind of in the process of selling the ski to torr and he doesn't have any more time to mess with it than I do, so Wilkey/lovin will be messing with it from here. He's offered to swap in spark plug boots, a coil, his known good dual 38's, and possibly a stator to narrow down the problem and just continue to throw parts at it from there. Any other ideas?
thanks,
mark
Click to expand...

My ski does the same thing but I kind of learned to live with it. It runs great except for the gurgling part. I have checked EVERYTHING but I'm at a loss.
 
Crab

Crab

thanks darin...noswad!
Location
Seattle
Perhaps too much water going down the exhaust? Jetworks valve? My X2 did that until I punched out the watebox and got control of how much water I was pushing down the pipe.
 
Last edited:
masterblaster

masterblaster

X-H2
Took the ski out for a bit today and tried some coil boot fixes and some extra plugs.nothing worked. But i did double check a few things,when the ski is cold it seems to only bog out in the middle throttle range but its real bad like a complete stop nothing feel,not water box related. When you butter it to get it up top in the rpms it rips,but only for about 5 to 10 min until it gets warmed up,then it shows the middle range problem even worse,and once you get it up top it breaks up the intire time and has no real power at all. I let it cool down changed plugs and did it twice to verify,it did the same thing. Im thinking stator coil possibly? it feels more like a carb problem cold but once you get it hot it starts to feel more like a ignition prob.
 
masterblaster

masterblaster

X-H2
ada lpw sig head,checked the plugs with 2 different sets,the front one is a little more rich than the back but both are just a little honey golden color,so think the head gasket is fine?
 
beachedflunkey

beachedflunkey

wavejunkies
Location
Virginia Beach
torr man just get the ski to brian. Pull the reeds and if there is nothing obviously wrong, then pop his complete intake setup on and see how she does @ Pungo . Should take 2hrs max plus the $80 in diesel to drive out to southMotha*********inhickory ;)
 
Idok

Idok

F1pro
Location
Nations oldest muthaF+++kin city
masterblaster said:
Took the ski out for a bit today and tried some coil boot fixes and some extra plugs.nothing worked. But i did double check a few things,when the ski is cold it seems to only bog out in the middle throttle range but its real bad like a complete stop nothing feel,not water box related. When you butter it to get it up top in the rpms it rips,but only for about 5 to 10 min until it gets warmed up,then it shows the middle range problem even worse,and once you get it up top it breaks up the intire time and has no real power at all. I let it cool down changed plugs and did it twice to verify,it did the same thing. Im thinking stator coil possibly? it feels more like a carb problem cold but once you get it hot it starts to feel more like a ignition prob.
Click to expand...

:Banane19:
 
beachedflunkey

beachedflunkey

wavejunkies
Location
Virginia Beach
Stator is something to try for sure but we tested the resistance on the pulse and lighting wires and it was good per the manual. What are symptoms of a stator problem - I thought it would be throughout the power band?

I never noticed any different problems hot or cold with the ski. Even on the trailer the other day the ski was acting up immediately after it had been sitting for a week. I rode it for 5-10min and it acted the same the whole time just as I described above ^^, works 90% okay if I ride around blipping the throttle but not if I gun it from anything less than 3/4 :dunno:
 
masterblaster

masterblaster

X-H2
Mark,I wanted to verify it did the same thing more than once,I remembered you saying it did a little better for the first 10 min in FL the last time you tested,In order to get it hot in flat water you cant just tool around and tail stand circle and such,a couple wot blasts here and there and riding some distance for 10 min and it will show up even in the top end,breaking up and such,thats when it really starts feeling like stator coil.i guess its still possible reed issue,i guess that could change with heat.But im thinking carbs are fine.
 
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