Homelite XL-12 won't stay running

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cg23cpo

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New member here with no experience with 2 cycle engines and I have my great uncle's XL-12. I cleaned the carb and got it running, but it's a bear to start (floods pretty easy I.e. very wet spark plug) and won't stay running. After warm up, it will start easier and idle, then when I run it up to full throttle it runs for a short time and then dies. This is an old blue model SN 03430933 with thumb oiler. Carb is a Walbro SDC 29-1. Now I'm stuck trying to figure out how to keep it going and things I need to look for. I have a new fuel filter and fuel line to put on, but have not done it yet. Any suggestions on which gas to use? Other ideas that might cause this behavior? I has been sitting for over 20 yrs.
 
If it is flooding, I would put a new kit in it, with needle. Also look and see if it has points.
But before all of that, look at the piston through the exhaust port.
 
I would also check the point gap and give them a little clean while you are at it. The xl-12 is a good saw worth the effort to fix. Yours is a 1970 model from the serial.
 
Ah, when I cleaned the carb, I put a carb kit in.
I'll clean the points in the near future and see what it does. Any guidance for pulling the flywheel?
My father always complained this saw was hard to start, but then he used it infrequently. There is sentimental value here as my great grandfather and great uncle used it to cut fire wood for the maple sugar shack and as a youth I helped collect maple sap with a International Farmall A and we made maple candy and "sugar on snow". Good times.
Any other ideas?
 
The timing being off will make them hard to start. My old homelites are easy starters if tuned and timed right. My 1965 xl auto is Two to three pulls cold and one warm.
 
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