OK, so I got this 8N last summer, finally got it running (but it needed major work) but I did get a kit for
the carb and rebuilt it. Carb worked great. Took the tractor in the shop last fall and tore the engine
down. Fast forward to a month ago when the engine was back together and running. Engine will not idle
without some choke on. Runs fine at speeds above idle. I have had the carb apart at least a half dozen
times, cleaned every passage, etc. and yet it refuses to idle. Doesn't matter what I do with the idle
adjustment screw, nothing changes. Then tonite, for whatever reason, I started to adjust the main jet
needle valve. Found out that it doesn't matter what I do with it, the engine still happily runs fine above
idle. I've verified that there is no vacuum leak from carb to manifold to engine so that's not it. Now I've
been rebuilding carbs for at least 40 years but this one has me baffled. Where do I go with this??? I'm
ready to throw it out and get another carb but that seems ridiculous.
Thanks
Norm
the carb and rebuilt it. Carb worked great. Took the tractor in the shop last fall and tore the engine
down. Fast forward to a month ago when the engine was back together and running. Engine will not idle
without some choke on. Runs fine at speeds above idle. I have had the carb apart at least a half dozen
times, cleaned every passage, etc. and yet it refuses to idle. Doesn't matter what I do with the idle
adjustment screw, nothing changes. Then tonite, for whatever reason, I started to adjust the main jet
needle valve. Found out that it doesn't matter what I do with it, the engine still happily runs fine above
idle. I've verified that there is no vacuum leak from carb to manifold to engine so that's not it. Now I've
been rebuilding carbs for at least 40 years but this one has me baffled. Where do I go with this??? I'm
ready to throw it out and get another carb but that seems ridiculous.
Thanks
Norm