Make a list
Hi Joel
Make a list of all the things it could be. Put the list in order of most to least expensive and time consuming to fix, then turn the list upside down and start with least. I often forget this approach and start taking things apart, only to find in the end that it was something really simple.
As Bob suggest it probably one of the three Air...fuel...spark.....
The cranking slowly though is something I would start with, is it really slower than normal cranking? If so disconnect the battery and charge it while you have it disconnected clean the terminals.
At the bottom of Bob suggestion he hits on one of the really big problems down here in the States "modern gas" goes stale very quickly. I make it a rule that if I can get the engines to run in the spring burn through the bad old gas and put fresh in before trying to fix rough running or do a tune up. Most often with fresh gas and ten miles on the road the problems go away.
Please let us know what it you find.
Cheers Phil
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