• This site contains eBay affiliate links for which Sea-Doo Forum may be compensated.

need carb help!

Status
Not open for further replies.

Hammer_Time

New Member
I need some help Please! I own a 96 Challenger 787. i bought it at sea level and i live at about 6000ft. Last summer i only got to try and take it out once. and durring that one time i managed to strip off both of the low adjustment screws. Once i got home and got the carbs off i found that they were so gummed up that nothing could turn or adjust. i took the easy way out. and bought some clean used ones off the internet (they also came from about sea level).
As you can probably guess im getting way too much fuel. i went to the only shop in town and they told me that i needed to drop my main jets 8%. so they sold me a 135.5 for my front carb and a 131.5 for the rear one. I took it out today to try and tune it and it runs real smooth (unlike befor) but it still doesnt rev above 4500 rpm in water. It doesnt misfire or hesitate it just feels like its not opening up al the way but it is. I dont exactly have the know how or the ear to tune the carbs. But if i can get some good advice i should get it close. so if any one can help me out that would be great. thanks.
 
If I had to guess, it's not switching to the high speed jet (which I think occurs around 4500RPM) It could be that something is clogged in them and they need a rebuild.

If you take them apart, remove all the parts from the body that you can and clean them out very well with carb cleaner. Also spray the passageways with cleaner. Then take compressed air and blow them out. The cleaner makes it lose, but the air will blow out anything that might be stuck in there.
 
ok that sounds easy enough. now i have a question. how do i adjust the oil pump? it smokes, not bad but it smokes and i asume im getting too much oil.
 
Look carefully at the pump where the cable comes in and around, there will be a line stamped into each piece, to make it easier next time place a dot next to each line with nail polish so you can see them while twisting over from the adjuster at the carb end of the cable. Anyone doing this on a flat top motor really knows how hard to see those lines...
 
Status
Not open for further replies.
Back
Top