9n issues

[Eman85]

Torch cleaners are nice but find a friend that plays guitar and get their old strings. You get a nice assortment of sizes.
 

[old]

Probably missed something in the carb or a manifold leak. Worked on a 9N yesterday with a problem a lot like that one
 

[HarryVanderpool]

When all else checks out fine, inspect inlet and exhaust pipes for blockage.
Sometimes rodents will fill exhaust with bedding that later swells and clogs the pipe.
 

[Mad Farmer]

I had an exhaust leak years ago, and did carb same time I did manifold. Local garage still has the nasty ZEP carb cleaner dunk tank, that stuff loosens up everything. I used a good complete quality carb kit and all has been well with carby since then.

I did crack that manifold plowing snow when the muffler got bashed on a snowbank and the exhaust flange broke.

Beware the new Chi-Com manifolds. Some won't fit. First one I tried was cast in a poor shape and would not allow the throttle/governor linkage to work, even after a 1/2 hour taking an angle grinder to it. The next one I got from a different source fit perfect.
 

[old]

Not likely to be the problem but never hurts to check. Point gap correct at 0.015??
 

[John in Mich]

A long time contributor to Ford tractor pages often said, many carb issues are spark. His handle was Sparkymiester. A week spark requires more fuel. I would look at everything contributing to (or restricting) spark. Points good, properly timed? Spark plug wires good copper or did someone put automotive wires on? etc.
 

[Maineman]

Id look at weak spark.
Dirty points

Joe