98 Sportsman idles great cutting out at full throttle

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Jul 8, 2020 | 05:30 PM

catronjl

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Weekend Warrior

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98 Sportsman idles great cutting out at full throttle

I have seen pages of posts on this problem but think mine is strange. If I cover the inlet tube to air box revs up and runs good but if not cuts out and backfires. Is this a fuel issue???

Jul 9, 2020 | 07:04 PM

Nomicron99

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From: North Idaho

Check the intake adapter between the carb and engine. You will probably find it torn.

Oct 16, 2020 | 11:31 AM

catronjl

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I checked intake boot. No tears! Still can’t get it to open up unless I restrict the air! What am I missing????

Oct 16, 2020 | 02:40 PM

Nomicron99

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From: North Idaho

Sounds like you need to do a good carb clean and rebuild. Don't buy a cheap Chinese carb off ebay or you may end up with worse problems.

Oct 16, 2020 | 03:03 PM

catronjl

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How do I tell if someone has went with a Chinese carb in the past??

Oct 30, 2020 | 05:48 PM

catronjl

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Ordered a carb off eBay figured I’d try it! Put it on and this thing runs like a top!

Mar 14, 2021 | 07:53 AM

Glynnk1981

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Quote:

Originally Posted by catronjl

I have seen pages of posts on this problem but think mine is strange. If I cover the inlet tube to air box revs up and runs good but if not cuts out and backfires. Is this a fuel issue???

it sounds like the common problem with these particular at a, & that is the cam going flat and exhaust rocker worn.