My 30hp 4 stroke. Needs choke to accelerate. When I pull the plug wire on one or three the engine stalls. When I pull the plug on two nothing changes. I also found some wiring that seems odd.
Sounds to me like you're up for a thorough carb cleaning session. It could be ign. related, but my experience with those to date is that would be a rarity - especially when compared to the need to clean carbs to get a motor running right.
