706 Farmall

706 Farmall · Oct 18, 2020

I have a 706 Farmall with a 263 gas engine. I went to check the timing today. The engine is cold blooded, so I warmed it up first. I connected my timing light to the tractor, when I tried to run up the throttle up it sputter a little and at 2300 RPM really ran rough. When I looked at the front of the engine with timing mark and light, the engine timing was jumping around. it seeemed like once it was 22 degrees , then it would not go above about 10 degrees. Is my advance mechanism not working or hanging up? Thoughts Please. Thanks

Janicholson · Oct 18, 2020

The problem has a good chance of being a worn distributor bushing. The timing jumping around is usually not affected by the advance. A worn bushing will allow the points to opwn at odd intervals with the result that the opening timing varies wildly. To see if it is the issue, pull the cap and wiggle the rotor firmly soide to side. there should be zero movement. If you can move it even a visible amount it needs replaced. If you put the dist cam on the rubbing block, and wiggle away from and toward the rubbing block the point gap will change a bunch. A bad advance might allow the timing to be advanced all the time, or advance early if weak springs, but not likely to be retarded from full advance. Jim

706 Farmall

706 Farmall

Member

Janicholson

Well-known Member

Similar threads