Happy Easter everybody!
I am continuing to troubleshoot this darn tractor. I got the ignition firing well and reliably. But now it will backfire and die. Based on what I have read on here that suggests timing or lean mixture.
It would not run for more than few seconds before backfiring and then dying. I check the spark at all four plugs again and it was good. I removed the air intake pipe from the carb and hit it with a couple of blasts of carb cleaner. Then it would start and run for a little bit and backfire and die. Progress...right?
I started it up again found that when I choked it a bit when it first backfire I could get it to recover for awhile. If I continue to nurse the choke I can keep it running but it is obviously weak. After it does die, fuel rushes back out of the air intake on the carb.
I recently ran ATF in the fuel and have not adjusted anything on the carb. I have completed a compression test, so I do not think that there is a valve sticking. I have spot checked the timing by checking where the rotor is at when getting blow by my thumb on cylinder one. I do not see the timing marks on the flywheel however.
I am thinking it is a lean mixture but it ran just fine last summer with the carb set this way. Do you guys have any other thoughts? I have to admit this tractor is getting pretty frustrating.
Sorry for the lengthy post, but I want you guys to have most of the details.
Thanks in advance for the help.
Thad
I am continuing to troubleshoot this darn tractor. I got the ignition firing well and reliably. But now it will backfire and die. Based on what I have read on here that suggests timing or lean mixture.
It would not run for more than few seconds before backfiring and then dying. I check the spark at all four plugs again and it was good. I removed the air intake pipe from the carb and hit it with a couple of blasts of carb cleaner. Then it would start and run for a little bit and backfire and die. Progress...right?
I started it up again found that when I choked it a bit when it first backfire I could get it to recover for awhile. If I continue to nurse the choke I can keep it running but it is obviously weak. After it does die, fuel rushes back out of the air intake on the carb.
I recently ran ATF in the fuel and have not adjusted anything on the carb. I have completed a compression test, so I do not think that there is a valve sticking. I have spot checked the timing by checking where the rotor is at when getting blow by my thumb on cylinder one. I do not see the timing marks on the flywheel however.
I am thinking it is a lean mixture but it ran just fine last summer with the carb set this way. Do you guys have any other thoughts? I have to admit this tractor is getting pretty frustrating.
Sorry for the lengthy post, but I want you guys to have most of the details.
Thanks in advance for the help.
Thad