grandpasjubilee
New User
I tried to search for an answer to this but I can't find anything that matches my problem. Sorry for the long post.
Background: I have a 1953 Jubilee that I bought from my grandfather three years ago now. It is still 6V. I only use it for mowing our 1 Acre field once a week with a bush hog. It takes about 45 minutes to mow the field. Finding that my grandfather hadn't done much maintenance in the last few years, I changed the oil and did a tune up a little over a year ago. This included a new rotor, cap, points, condenser, plugs (437), and wires. I also drained the fuel, cleaned the three fuel filters, and checked the tank (it was spotless inside from what I could see and all three filters looked clean). I also had the carb rebuilt because the float wasn't working. I am generally good at doing mechanical work but don't have a ton of experience so I do the "easy" things myself. So I think I did all these things correctly since it all ran well for a year.
The problem: As I said, the tractor seemed to run fine for the past year. Just recently it started to occasionally run rough. It would stutter and almost stall. Pushing the clutch in keeps it from stalling but it still runs rough. Sometimes it would do it once and not repeat. Other times it would keep doing it. It would never stall but would get really rough. It would sometimes do it just after startup, other times while mowing for a while. Sometimes both. Sometimes it clears up before I even have a chance to put the clutch in and doesn't come back, other times it gets so bad I can't let the clutch out or it stalls. Basically, it seems random.
What I have tried: I pulled off the air intake to the carb in case the filter was clogged. It still ran rough. I sprayed carb cleaner in the intake while it was running rough and it still ran rough. So I think I ruled out air and fuel as the issues. So I tried spark. Pulled all four plugs and could see spark. Checked the point gap and it was still fine.
Any suggestions for next steps?
Thanks in advance.
Background: I have a 1953 Jubilee that I bought from my grandfather three years ago now. It is still 6V. I only use it for mowing our 1 Acre field once a week with a bush hog. It takes about 45 minutes to mow the field. Finding that my grandfather hadn't done much maintenance in the last few years, I changed the oil and did a tune up a little over a year ago. This included a new rotor, cap, points, condenser, plugs (437), and wires. I also drained the fuel, cleaned the three fuel filters, and checked the tank (it was spotless inside from what I could see and all three filters looked clean). I also had the carb rebuilt because the float wasn't working. I am generally good at doing mechanical work but don't have a ton of experience so I do the "easy" things myself. So I think I did all these things correctly since it all ran well for a year.
The problem: As I said, the tractor seemed to run fine for the past year. Just recently it started to occasionally run rough. It would stutter and almost stall. Pushing the clutch in keeps it from stalling but it still runs rough. Sometimes it would do it once and not repeat. Other times it would keep doing it. It would never stall but would get really rough. It would sometimes do it just after startup, other times while mowing for a while. Sometimes both. Sometimes it clears up before I even have a chance to put the clutch in and doesn't come back, other times it gets so bad I can't let the clutch out or it stalls. Basically, it seems random.
What I have tried: I pulled off the air intake to the carb in case the filter was clogged. It still ran rough. I sprayed carb cleaner in the intake while it was running rough and it still ran rough. So I think I ruled out air and fuel as the issues. So I tried spark. Pulled all four plugs and could see spark. Checked the point gap and it was still fine.
Any suggestions for next steps?
Thanks in advance.