Re: 49' M fuel/timing question

Posted by Wayne Swenson on June 23, 2004 at 21:34:33 from (66.191.68.61):

In Reply to: 49' M fuel/timing question posted by jamie on June 23, 2004 at 19:45:19:

With the engine warm & running at wide open throttle (WOT), turn high speed mixture screw in until the engine begins to starve for fuel. Then turn the screw out until it begins to blubber. Now find the "sweet spot" in between the two settings. If you are working the engine (plowing, etc.), then the high speed screw needs to be turned out about 1 turn or more to be sure the engine has enough fuel for the extra power it is being called to produce.
The same proceedure can be followed for idle mixture with the addition of the ldle stop screw to set the low speed RPM.
On the "M" carb, the idle mixture screw is an air adjusting screw so turning in will richen the mixture and out will lean the mixture.
Once you have set the mixture screws once, do it over again to "fine tune" the settings.
Aren't carbs fun!!

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• Re: Re: 49' M fuel/timing question jamie 23:24:52 06/23/04 (0)

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