I have a 1989 40HP Mariner thats been running fine for 17 years. This spring I had a " starter turns over but no firing" situation. I checked the spark first ( put in new plugs too) and it was fine. Then I was gonna check the carb for gas. When I took off the plastic cover a bunch of corn and various other size seeds fell out of the bottom carb feedhorn. I vacuumed out what I could see but I suppose that the smaller seeds went farther in. Whats the best course of action now? Whats the worse damage they could have done and how much do I have to tear apart for seed eradication? Thanks