2N carburetor fuel delivery

Pilot199

Member
I'd had some problems with the float not delivering fuel properly on my '47 2N so I cleaned out the carb & re-assembled it.

Same problem.

I just put a new carb kit on it, adjusted the float & it's still feeding too much fuel. I can adjust it by dialing down the fuel shut off valve but that's only good for one speed.

When bench testing the carb I could blow through the fuel inlet then tilt the carb & the fuel needle would shut off the air. When I re-install the carb the needle still feeds too much fuel & the engine chokes & backfires on it.

I've adjusted the float twice & not sure what to try next.

Any suggestions are appreciated.

Gary
 
(quoted from post at 14:09:00 06/13/18) I'd had some problems with the float not delivering fuel properly on my '47 2N so I cleaned out the carb & re-assembled it.

Same problem.

I just put a new carb kit on it, adjusted the float & it's still feeding too much fuel. I can adjust it by dialing down the fuel shut off valve but that's only good for one speed.

When bench testing the carb I could blow through the fuel inlet then tilt the carb & the fuel needle would shut off the air. When I re-install the carb the needle still feeds too much fuel & the engine chokes & backfires on it. Be sure float is not rubbing sides of bowl

I've adjusted the float twice & not sure what to try next.

Any suggestions are appreciated.

Gary
 
(quoted from post at 11:09:00 06/13/18) I'd had some problems with the float not delivering fuel properly on my '47 2N so I cleaned out the carb & re-assembled it.

Same problem.

I just put a new carb kit on it, adjusted the float & it's still feeding too much fuel. I can adjust it by dialing down the fuel shut off valve but that's only good for one speed.

When bench testing the carb I could blow through the fuel inlet then tilt the carb & the fuel needle would shut off the air. When I re-install the carb the needle still feeds too much fuel & the engine chokes & backfires on it.

I've adjusted the float twice & not sure what to try next.

Any suggestions are appreciated.

Gary
I can only think of floats being flooded and sinking, poorly adjusted or the needle or seat bad and not shutting off. Make sure the gasket is not hanging the float from moving freely.
 
(quoted from post at 12:09:00 06/13/18) I'd had some problems with the float not delivering fuel properly on my '47 2N so I cleaned out the carb & re-assembled it.

Same problem.

I just put a new carb kit on it, adjusted the float & it's still feeding too much fuel. I can adjust it by dialing down the fuel shut off valve but that's only good for one speed.

When bench testing the carb I could blow through the fuel inlet then tilt the carb & the fuel needle would shut off the air. When I re-install the carb the needle still feeds too much fuel & the engine chokes & backfires on it.

I've adjusted the float twice & not sure what to try next.

Any suggestions are appreciated.

Gary

quit using the choke when starting.
 
Thanks tractorman, I'll open it up again & check it.

Also, JMOR, I saw that you responded but nothing came through.
 
(reply to post at 19:19:06 06/13/18)

pilot, it's a quirk of the hybrid classic/modern view board here. classic view strips out goutes, and he accidentally put his reply as part of your quoted post.

he said "Be sure float is not rubbing sides of bowl "
 
(quoted from post at 15:19:06 06/13/18) Thanks tractorman, I'll open it up again & check it.
I just had the same issue BTW. Not sure what caused it but I think the pin holding the float slid to one side and caused the float to get stuck. Took it all apart, 3 Min, and got it all sorted out.
 
OK thanks for relaying there.

I could hear the float moving while bench testing the carb but it may be that it's not travelling far enough.

One thing I just noticed, the old carb kit had a solid metal needle; the new kit has the needle with a rubber tip. It seems like the rubber tip would seal better.

Gary
 
(quoted from post at 18:12:47 06/13/18) OK thanks for relaying there.

I could hear the float moving while bench testing the carb but it may be that it's not travelling far enough.

One thing I just noticed, the old carb kit had a solid metal needle; the new kit has the needle with a rubber tip. It seems like the rubber tip would seal better.

Gary
would take the steel tip over a rubber one every day. The rubber have a tendency to stick closed. You may have other problems than the carb. Don't git hung up on the idea that you are getting too much fuel. Unless you are choking the heck out of it you are not getting to much unless it is running out the throat when just sitting without running.
 
I really haven't used the choke much at all. I suspected too much fuel flow when the engine ran much smoother when I was turning the fuel off to shut the tractor down.
 

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