I have a 1994 Johnson Venom 200. I bought the boat from the original owner with about 170 hours on it. Before I bought it however it sat up for about a year. It took a while to crank and after I cranked it it ran pretty rough to say the least. I squirted a can of the fuel system conditioner into the schrader port on the engine by the carbs. It didn't take long to break free and seemingly ran pretty well. I've got about 210 hours on it now and it feels like it is starting to lose power and fuel consumption is getting worse also. I did a compression check with the engine completely cold and it only read 80# at its highest. The lowest cylinder had 65# and two others on the same side had 70#. The three with 80# were all on the stbd side. It is also harder to keep it idling these days as well. Once she's on plane though it's still pretty strong. Any thoughts or advice???? Thanks much!!!
