I have this motor on my pontoon. Last fall when I took it out, I thought I ran out of fuel when I put it on the trailer. I put new gas in this spring and when I put in, it was very hard to start...harder than usual. Now, it won't go above 3100 rpm. I drained the carbs, put a portable tank on with sea foam and fresh gas and drove it thinking maybe it had water out of the big fixed tank. No deal, 3100 rpm max and when I give it full throttle, it acts like it wants to die. I didn't have my Honda spark plug socket and my regular sockets wouldn't fit down into the opening to get a grip on the plugs. I picked up 3 new plugs today and hope to get them in there in a few days. Two vinyl tubes coming out of the air box from the bottom were plugged with bug stuf so I cleaned them out and that didn't help, got home where my shop manual is and saw where there is another set of tubes for venting the carbs, if these were plugged would it make it run like this? Thanks for any thoughts.
