mattallen37
New User
I have had a 9N/2N tractor for a little while, that I use occasionally to push snow, plow the garden, or jockey trailers around the property (maybe an average of 1-2 hours per month). It probably doesn't make any difference to this thread, but when I got the tractor, I was told is was "a 1947 2N, which is basically identical to a 9N", but the engine block has "9N" stamped in it (at the beginning of the serial number, IIRC).
The engine tends to over-rev with no/minimal load. With no load, using the throttle lever I can adjust from a nice idle all the way up to a rattling rev (the hood or something might be loose, but it sure makes a racket).
If I have the throttle all the way up, it will run very fast, and then when I drop the plow (add a load), for half a jiffy it sounds like it will stall, and then the governor kicks in and it has more than enough power to pull the plow at a nice full (but not excessive) engine speed (what I think it should be). However, when I get to the end of the row, lift the plow, and push in the clutch, the engine immediately gets to running at that really high speed again.
Even just driving (flat or uphill) is enough load to keep the engine from so significantly over-revving, but downhill or pushing in the clutch will over-rev, even at 1/2-3/4 throttle.
So what specifically should I check or adjust to fix the over-revving? The governor is obviously working, at least to some extent (it moderately well keeps the engine speed up under load). I've never adjusted the carburetor (it starts easily with a little choke, and idles fine).
The engine tends to over-rev with no/minimal load. With no load, using the throttle lever I can adjust from a nice idle all the way up to a rattling rev (the hood or something might be loose, but it sure makes a racket).
If I have the throttle all the way up, it will run very fast, and then when I drop the plow (add a load), for half a jiffy it sounds like it will stall, and then the governor kicks in and it has more than enough power to pull the plow at a nice full (but not excessive) engine speed (what I think it should be). However, when I get to the end of the row, lift the plow, and push in the clutch, the engine immediately gets to running at that really high speed again.
Even just driving (flat or uphill) is enough load to keep the engine from so significantly over-revving, but downhill or pushing in the clutch will over-rev, even at 1/2-3/4 throttle.
So what specifically should I check or adjust to fix the over-revving? The governor is obviously working, at least to some extent (it moderately well keeps the engine speed up under load). I've never adjusted the carburetor (it starts easily with a little choke, and idles fine).
