Posted by rustyfarmall on July 01, 2009 at 06:44:10 from (209.152.78.140):
In Reply to: M loss of power posted by FarmallFred on June 30, 2009 at 18:08:56:
FarmallFred said: (quoted from post at 18:08:56 06/30/09) Recently rebuilt my M with 4" domed pistons. Since this was bigger than stock, I drilled main jet slightly bigger to make sure it was getting enough fuel, governor is rebuilt, electronic ignition in dist., head machined, etc... Ran good, but now it seems to fall on it's face when I lug it down. I pulled a plug and it looks pretty black. Will this allow it to run great until under load, or could I have more going on than that?
You ruined a perfectly good carburetor. That main jet is no longer available as a replacement part.
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