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Ok we need to start with a couple of easy tests. Squeeze the primer bulb does it get hard or can you continue to pump?
If bulb gets hard we need to do a spark and compression test. The compression must be 90+ psi with no more than 15% difference between cylinders. Then we must do a spark test using a spark gap tester. Spark must jum[p a 7/16" gap on the tester.
If these check good then we have to use a timing light and run the boat. Check spark on both cylinders when engine is acting up. We want to see the flash of the timing light to be steady with no dead spots. If you find a misfire move that cylinders coil to the other cylinder. Does the misfire move. If the misfire moves then that coil is bad. If the misfire stays then we have another ignition component failing.
From your symptoms we can have spark loss of a flooding condition.
Post back with questions and findings.
Here is a spark gap tester. http://www.nationaltoolwarehouse.com/Ignition-Spark-Tester-with-Adjustable-Gap-P41027.aspx?zmam=31282435&zmas=50&zmac=750&zmap=THX404&gclid=Cj0KEQjwt-G8BRDktsvwpPTn1PkBEiQA-MRsBchGHqG-CPsOZGRWNpHy8BkfCIEaILVaIfaxOIgo5DsaAmSj8P8HAQ
You can get one of these at most auto parts stores.
No you don't have to pay again you have taken care of the first question I was paid. When you opened this new question you put up a deposit. We can continue on this link tomorrow or whenever you get a chance to do the tests.
I will close the other question .
Ok your welcome. Talk tomorrow.
I'll be here all day let me know what you find.