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Tractor Pulling Discussion Forum

Re: m carb update

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north puller

08-07-2013 06:14:34

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Drill the bottom set of holes in the metering stem a little larger.

You haven't changed anything with the ignition timing have you?

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08-07-2013 07:26:13

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 Re: m carb update in reply to north puller, 08-07-2013 06:14:34  
No I haven't changed timing. the carburetor is stockand the engine is just a 264 overboard kit with fire craters would drilling it out get me to much fuel?

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08-07-2013 08:17:33

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 Re: m carb update in reply to Johninmn, 08-07-2013 07:26:13  
The M&W performance improvement package was furnished with a metering stem that DID have larger holes.

What you want to do is find a drill bit that just does fit into the bottom holes of the metering stem, and then use a drill that is one size larger. If that isn't enough you can go one or two sizes larger.

If you go to big, you should be able to compensate for it by screwing the high speed idle back in a little. If all else fails, those metering stems are easy enough to come by.

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08-07-2013 09:02:00

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 Re: m carb update in reply to RustyFarmall, 08-07-2013 08:17:33  
Ill give it a try. I got a carb kit for a super m figuring it would have the bigger parts but I guess not

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08-07-2013 10:36:06

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 Re: m carb update in reply to Johninmn, 08-07-2013 09:02:00  
Most carb kits are pretty much generic anymore. One size fits all.

You might try using the original metering stem, instead of the one that came in the kit.

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