I have this same motor on my boat. Like some were saying check your bulb, don't get the one from Walmart they aren't worth a count. This just happen to my motor and I got one from Walmart and it's not that great. I rebuilt the carbs on mine last year and it runs like a champ. Also check and make sure your gasline doesn't have a kink in it. I believe the bottom gasline on the lower carb is in a tight spot so just make sure everything is good there.

By the way my dad is a marine mechanic on the side and is probably one the cheapest around. If you are still having problems on here then send me a personal message and I will give you his contact info and let you know his rates.