I split the tractor awhile back and put on a new ring gear,clutch,pressure plate,throwout bearing and never timed it after doing the 12 volt conversion. I borrowed my buddys timing light and holy cow she was out a ways ,i'm amazed it even ran!I got close to the 475 rpms and with some carb tinkering.I was having a hard time seeing the timing marks,so a took a small paint brush and marked 4 degrees BTDC.Wahla i can finally see it with the light.Tighten down the distributor and watch the temp gauge. I noticed it was going up into higher green but not into red,then it would go down. So i took her for a ride an kept an eye on the temp.It stayed in the green raising and lowering as i drove.Think im watching the stat opening and closing. Made it back to garage ,shut her down and did not back fire. Thanks again to those that have posted,appreciate your knowledge.Don