Jim in Western MI
Member
Help and ideas needed! Posted a few weeks ago with what was then considered to be a leaking carb float problem. This 601 had started the first couple of revs with just a brief touch of choke and ran strong all summer, mowing two pastures in the NC mountains with a lot of hills; it was like my 8N's were on steroids! Prior to acquiring it last Spring with a small farm purchase, it had sat outside for a couple of years under a ragged tarp, but a new battery and cables, purged fuel system, new plugs, and cleaning the points had it up and running great. Three weeks after being shut down after normal use, it started with clouds of black smoke and very rough running, and shortly would cut off. Nothing else had changed; all indications were a leaking float (or so I thought). After a professional rebuild by Royce (and a beautiful job of course), it started with the same clouds of black smoke and would run rough for only a few seconds before cutting off.
Since then, the air intake and exhaust have been checked for obstructions, proper alignment and connection to choke and throttle linkages has been confirmed, excellent fuel flow with 1/4" spark, 1243 firing order confirmed, a new coil, new ignition wires, rotor, cap, and dust plate replaced with YT parts, a second set of new plugs, shaft of distributor checked for looseness (tight in one direction, a few degrees of movement in the other), checked to see if distributor had moved (no indication that it has moved from the looks of the paint on the hold down bracket and bolt, and distributor was tight as a tick in its mounting), and yet the problem remains; in fact, now worse, it will not even start with a fully charged battery.
We're baffled; I'm sure some you of have faced a similar run problem and I am seeking your experience and ideas. The tractor is four hours away and I only get there every coupled of weeks to try new things. I would like to get it up and going again..., thanks in advance.
Since then, the air intake and exhaust have been checked for obstructions, proper alignment and connection to choke and throttle linkages has been confirmed, excellent fuel flow with 1/4" spark, 1243 firing order confirmed, a new coil, new ignition wires, rotor, cap, and dust plate replaced with YT parts, a second set of new plugs, shaft of distributor checked for looseness (tight in one direction, a few degrees of movement in the other), checked to see if distributor had moved (no indication that it has moved from the looks of the paint on the hold down bracket and bolt, and distributor was tight as a tick in its mounting), and yet the problem remains; in fact, now worse, it will not even start with a fully charged battery.
We're baffled; I'm sure some you of have faced a similar run problem and I am seeking your experience and ideas. The tractor is four hours away and I only get there every coupled of weeks to try new things. I would like to get it up and going again..., thanks in advance.