nathansr06
Cadet
- Joined
- Mar 30, 2014
- Messages
- 15
I am new to boats but have a decent understanding of engines. I can turn a wrench and try to do most things on my own. I bought a pontoon boat with a 1989 Johnson 40 hp vro engine. 2 stroke 2 cylinder. I heard it run on muffs before I bought it. It sounded a little rough at idle but not terrible. I took it out today after completely rebuilding the console. It fired right up and I took off...not so speedy. I know it's a pontoon with a 40 horse but it should run faster than 5 to 10 mph. I can Rev the engine to over 6k rpm no problem but in gear it tops out around 2500 rpm. I got it back on the trailer and popped the hood. The bottom carb wasn't connected so when I was giving it fuel it was only to the top on. I hooked it back up and backed it back into the water. As soon as I took off it ran great and started getting to full speed. It ran great for about 100 yards then the rpms dropped back down to 2500. I looked and the bottom carb was still hooked up and working right so now I'm at a loss of thoughts.
Anyone have any ideas?
Anyone have any ideas?