need advice 89 cougar - Snowmobile Forum: Your #1 Snowmobile Forum

critter · 02-09-2008, 05:11 PM

hey everyone
ijust picked up a 89 cougar fc with twin carbs off a friend it been sitting for 2 years i got it started but it needed new carbs so got some on ebay put them in started after a few pulls seems to be running rough if i punch the gas it doesnt rev right up but if i keep reving its fine also it dosnt idle very well if i rev it and let off the gas it will stall i think i have the carbs mixed sitting on the sled is the 46mm on the right and the 40mm on the left also what is the spark gap
thanks in advance

**RJ Gleason** · 02-10-2008, 07:09 AM

Put the originals back on after a thorough cleaning.
The ones that you have may not even be jetted right for the engine.

Plug gap should be; 0.020

kccats · 02-10-2008, 09:29 AM

Did you get a set for that cougar! Or just a pair of carbs? A pair of carbs off E Bay are going to need to be cleaned just like your old ones would!Unless you didn't get a set with the sled, why would you buy a set? It will cost you more to jet it correctly than it would to rebuild your old ones completely!

critter · 02-10-2008, 10:52 AM

he said that the carbs were off a running sled and he cleaned them up nice so i thought it would be ok but i cleaned out the old carbs and it started up a little rough but seems to run ok but still revs up sluggish

kccats · 02-10-2008, 12:23 PM

Did you clean the jets and all the passages?

critter · 02-10-2008, 12:25 PM

yes i did also put the other carbs i bought back in and cleaned them runs better but still is sluggish off the start i adjusted the idle air screw but still the same

**RJ Gleason** · 02-11-2008, 03:54 AM

Now it's time to clean the clutches.
Remove the belt, use compressed air and blow out the belt dust from both units.
Use spray brake cleaner and flush them out, wipe with a clean cloth and blow them out again. Install new belt.

critter · 02-11-2008, 06:48 AM

i will giv that a try,, i took it out yesterday down the power lines ran great once you get goin but around 6o it bogs down a little but i might have been low on gas would the clutch cause that

**RJ Gleason** · 02-11-2008, 07:25 AM

Dirty clutches will effect take off and acceleration as well.

threetop20 · 02-11-2008, 09:11 AM

Ajustments On The Two Carbs Must Be The Same If Not It Well Bog Out