Went to start my engines. Starboard everything perfect! Port wouldn't start due to no fuel. Both engines share same tank. I took off anti-siphon valve and cleaned it. It had lots of snot in it. I checked all connections and tried again. The engine started but is running rough and there is a loud popping sound coming from the carb. It sounds like crap! I had no problem with these engines last year. I don't know where to start . Any feedback will be appreciated.
