The compression check is a good idea. Make sure something didn't pop on the inside. My son-in-law had one of those with 133 hours on it. His popped once and blew the side of the engine out. His was more obvious but still the unexpected surprise these engines seem to provide.
If you don't have a compression tester just pull the plug and place a pencil in the cylinder and turn the flywheel by hand and watch to see if the pencil moves. If it doesn't your connecting rod isn't connecting any longer.
Just my thought. Trying the carb cleaner down the carb throat is also a good test. Without compression it isn't going to fire.
Good luck.
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Randy
Cubs: 71, 72, 127, 149, 1440, 2186 and 1864
John Deere 110 round fender
John Deere 140 H3
Sears: GTV16
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