Hello everyone, so I have a 1976 Johnson 9.9. It was given to me by my FIL. He used it on a 14ft aluminum boat for years and then upgraded. This motor sat in his garage for about 8 years before he gave it to me. When I got it I rebuilt the carb, put new coils, new plugs and checked compression. Compression was 118 and 120. The motor runs fine in a test barrel, starts on 2/3rd pull every time. Every time I launch my boat and start it up it will idle, but when I put it in gear it gets real sloppy, almost like a misfire and when I throttle it, it does nothing. Will not Rev up at all, took it home, went over everything I did and all seems well. Back in test barrel and it seems good to go, back to lake. Same issue I kept messing with the throttle and got up to about 3mph (14ft aluminum V hull with me and my dog) went about 200 yards and it sputtered and tried to rev higher but then died. Got it started and back to the trailer. Just went out and started it, it revs right up. It just seems like when it’s under load it won’t do anything. Just sits at idle speed, any help or direction to look is greatly appreciated. Thanks!
