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By jhamrick75
If anyone is having issues with the Mikuni VM24SS carb, I thought I would post what issues I had and how I resolved them.
Acquired a 93 Bayou 220 that had sat for over 4 years.
The carb was extremely corroded and pitted and full of leftover fuel.
Cleaned carb and bowl and was able to get the engine to start.
Within 30 seconds exhaust would heat up and start to glow red hot.
Removed carb and recleaned everything, including a second overnight soak.
Needless to say, after removing the carb for the 5th time and my frustration to the limit I
realized that my attention had been to the carb body and not to the bowl.
There is a small brass rod on the bottom of the carb that goes down into the float bowl but is seperated from the main section. I had cleaned that area very well....I had thought.
***The corrosion had sealed off the channel that runs from the main bowl section to the small tube section on the side of the float bowl. No amount of carb cleaner was going to get it to budge. So i took a small nail and started to scrape away the corrosion and was eventually able to dislodge enought of the corrosion that carb cleaner would flow through that channel. ***
I thoroughly cleaned each side of the channel in the float bowl and reinstalled the carb and now the issue of it running lean is gone.
On a second note the fuel mixture screw was a nightmare to remove as the threads had been corroded and wouldnt let the screw come out. I used a little cutting oil and worked the mixture screw in and out until I was able to push past the corroded threads and completely remove the needle. After a couple passes with a tap to clean the threads it is like new again.
Hope this helps if you are having a lean running machine.
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By P_syko
Hello all! I’m new to the 4 wheeler world, but not new to the mechanic world. I was a diesel mechanic for many years and last year got into jet skis. I just bought a 1987 Yamaha moto 4 350 and now learning the ins and outs of 2 stroke engines. Looking forward to learning all the things.
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By hfrost112
Hello im new Here im having a no spark issue with my 1987 suzuki lt230e with a no spark condition
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By quadcrazy
View File 1985 - 1995 Polaris ATV service manual (All Models)
1985 - 1995 Polaris ATV service manual (All Models)
Covers the following models:
1985 Scrambler Trail Boss
1986 Scrambler
1986 Trail Boss
1986 Scrambler
1986 Trail Boss
1987 Trail Boss
1987 Cyclone
1987 Trail Boss 4x4
1987 Trail Boss 4x4
1987 Trail Boss 4x4
1988 Trail Boss 2x4
1988 Trail Boss 4x4
1988 Trail Boss 250 RIES
1988 Trail Boss 250 RIES
1989 Trail Boss
1989 Trail Boss 2x4
1989 Trail Boss 4x4
1989 Big Boss 4x6
1989 Big Boss 4x6
1990 Trail Blazer
1990 Trail Boss 250
1990 Trail Boss 2x4
1990 Trail Boss 2x4 350L
1990 Trail Boss 4x4
1990 Trail Boss 4x4 350L
1990 Big Boss 4x6
1991 Trail Blazer
1991 Trail Boss 250
1991 Trail Boss 2x4
1991 Trail Boss 2x4 350L
1991 Trail Boss 4x4
1991 Trail Boss 4x4 350L
1991 Big Boss 4x6
1991 Big Boss 6x6
1992 Trail Blazer
1992 Trail Boss 250
1992 Trail Boss 2x4
1992 Trail Boss 2x4 350L
1992 Trail Boss 4x4
1992 Trail Boss 4x4 350L
1992 Big Boss 4x6
1992 Big Boss 6x6
1993 2502x4
1993 3502x4
1993 2504x4
1993 3504x4
1993 Sportsman
1993 2506x6
1993 3506x6
1993 Trail Boss
1993 Trail Blazer
1994 3002x4
1994 4002x4
1994 3004x4
1994 4004x4
1994 3006x6
1994 4006x6
1994 Trail Boss 2W
1994 Trail Blazer 2W
1994 Sportsman 4x4
1994 Sport
1995 3002x4
1995 4002x4
1995 3004x4
1995 Xplorer4x4
1995 4006x6
1995 Trail Boss
1995 Trail Blazer
1995 Sportsman 4x4
1995 Scrambler
1995 Magnum 2x4
1995 Magnum 4x4
1995 Sport
Submitter quadcrazy Submitted 05/24/2018 Category Polaris ATV
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