Timing normally does NOT change over the life of the motor.-----But a sheared flywheel key does throw out the timing.----That can happen if the flywheel nut is not torqued.----Can happen if tapers are not perfectly clean and dry on assembly.----What is your motor doing / not doing ?
I’ve had it 5 years. Started having problems end of last year. It didn’t ever run right all winter or summer. I had to replace the stator because it melted and I did the timer base at the same time. Then the power pack went out and I replaced that with all of the ignition coils at the same time. The starter was replaced in between all of that along with new cables and a new battery. Basically it been causing me a lot of problems the last year.
Guess you might have had an overheat episode at some point -- most likely to be a water pump issue. The motor has a water cooled regulator that can torch the engine if the cooling system fails -- mechanical failure or operator failure. But short of the regulator issue, serious overheating could be enough to destroy ignition parts.
Compression test done ?-----Electric primer valve working as it should ?------I would say something very simple is being overlooked.------Start your trouble shooting check list here.-----And don't throw out all the parts that have been replaced.
^^agree. Start with basics -- flywheel key/timing, measure open-air spark, compression test. Seems the stator melted on your watch, though, after running the engine w/o issues for about five years. Would Indicate something happened to cause the melt down (need not have been as exciting as an engine fire).