'49 8N Idle problem

Just my $.02 worth, it worked for me anyway.

Work, Work, Work,

Finally tried another manifold on it and it ran fine.

Poured gasoline in the bad manifold intake with the ports turned up and gas came up in the exhaust ports. Casting hole in the manifold where it could not be seen. BAD!

This was a genuine Ford tractor part too!

Zane

You write..... ."It runs great at idle, as long as the choke is 1/2 closed"..... .well I'm NOT IMPRESSED. If'n ya haffta close yer choke, it ain't idleing right,'cuz its too lean. You know it and I know it. Sounds like ya gotts a clogged up idle port, ya gotts 2 of'em, or yer 0.023" idlejet is semi-clogged. 'bout time ya bitt the bullett and cleaned'er out. You may need to use a fine copper wire as a cleaner-outer.

You do know how to "adjust" yer M/S carb, don't you? Ford sez: set BOTH down-pointing mainjet and side-pointing idle mixture to 1-turn. I set my mainjet to 1-1/2 turns and LEAVITT!!! Then adjust the idlemixture for max rpms, NOT smoothest, MAX rpms, understand? The N's idle is a SLOOOoooww 400 rpms set by the behind carb throttle setscrew. My idle mixtures usually end up about 3/8 turn. Remember: the N's idlemixture is BASSACKWARDS, out for lean, IN for enrich..... ..respectfully, Dell

As fer burning WD-40, ya ain't burning WD-40 oil, yer burning the propane pressure gas.

So what, if'n I eat pickled eggs, sourkraut, and beans, I can burn methane outta my exhaust too, BIG DEAL..... ...respectfully, the gassy Dell

I wrote....."If'n ya haffta close yer choke, it ain't idleing right,'cuz its too lean. You know it and I know it. Sounds like ya gotts a clogged up idle port, ya gotts 2 of'em, or yer 0.023" idlejet is semi-clogged. 'bout time ya bitt the bullett and cleaned'er out. You may need to use a fine copper wire as a cleaner-outer.

You do know how to "adjust" yer M/S carb, don't you? Ford sez: set BOTH down-pointing mainjet and side-pointing idle mixture to 1-turn. I set my mainjet to 1-1/2 turns and LEAVITT!!! Then adjust the idlemixture for max rpms, NOT smoothest, MAX rpms, understand? The N's idle is a SLOOOoooww 400 rpms set by the behind carb throttle setscrew. My idle mixtures usually end up about 3/8 turn. Remember: the N's idlemixture is BASSACKWARDS, out for lean, IN for enrich"..... ..respectfully, Dell