Hi everyone, I have a 2005 mercury 90 2 stroke which I am having problems with. It is a motor on my grandmas old boat which I had pulled out of a field and it had been sitting for years. (Parked because it was having the same trouble I am having) The motor always starts up super fast and very reliably. It has a moderately rough idle. If i run the motor out of the water I can bring the rpm’s all the way up but it runs pretty choppy. But when I put the motor under a load it has a horrible bog and the boat won’t go over like 10mph. I have now took the carburetors apart three times with no luck of it getting any better. I’ve taken the spark plugs out and they look perfect, and all three cylinders have what looks like to me great spark. I am now very lost and don’t know what to do. Looking up these symptoms keeps giving me different answers just as if I was looking up my sickness on google, it will tell you that your dying but it just ends up being a common cold haha. Any help and information is very much appreciated. Thanks in advance, Caden. (Below I have attached a video of it running. In the video I was keeping a constant throttle position.)
