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Old 12-21-2010, 05:37 PM   #1 (permalink)
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91 arctic cat problems

I just bought a 1991 arctic cat el tigre ext 550. it has been sitting for a couple years and i had to rebiuld the carbs. ran good for a while then it seemed like it was runnin on one cylinder and died. got it started again but still does the same thing every so often but if i play with the throttle when its bogged down i can save it and then it runs ok for a couple hundred feet then does it again. also the only way it starts is if i put the choke on for a 7 or 8 pulls without the key on then turn on the key and hold down the gas and then start it.
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Old 12-21-2010, 08:02 PM   #2 (permalink)
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You cleaned the carbs, but I bet you didn't drain the old fuel and clean out the tank. The pump picked up all the crud off the bottom of the tank and pumped it into the carbs.
Start over clean everything out real good.
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Old 12-21-2010, 08:24 PM   #3 (permalink)
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Replace ALL of the gas lines, too. The pickup line in the tank should come first.
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Old 12-22-2010, 07:12 AM   #4 (permalink)
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And what is your compression? At Wide Open Throtle?
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Old 12-22-2010, 08:48 AM   #5 (permalink)
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ok i'll try that thanks
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Old 12-22-2010, 11:32 AM   #6 (permalink)
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compression

Def check compression; I recently had the cable that controlled the oil injection break loose; so sled was only getting the idle setting dose of oil. Burned up a ring, had similar behavior - would run, kindof, for a minute or so...because of very low compression.
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Old 12-22-2010, 06:56 PM   #7 (permalink)
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If it has enough compression to blow your thumb off of each cylinder (one at a time) with both plugs out it should have enough compression to start.
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Old 01-03-2011, 01:03 PM   #8 (permalink)
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ended up the throttle cable broke on one of the carbs because the neadle was bent and was causing wear in the carb so i had to get a throttle cable and a ccarb also the kill switch was defective so it had no spark unless throttle was held open runs now put need to tune it
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