Home › Forum › Ask A Member › 1956 Johnson 30 hp won’t accelerate boat up on plane! › Reply To: 1956 Johnson 30 hp won’t accelerate boat up on plane!
Okay, I removed both spark plugs and they were both dry. I did a compression test and both cylinders are reading 120 lbs. Also checked the spark and I’m getting good spark on both. I checked the control box and everything there seems to be in good order. Now I’m back to tinkering with the throttle linkages. To answer Dave’s earlier question the boat is a 15 footer and weighs 520 lbs. The original 1956 Wagemaker brochure for the boat shows this same Johnson 30 hp motor mounted on the back so I think I’m within the correct weight limit for this motor. The propeller is an original 3 blade type and I have the trim pin set to the lowest setting. At this point I am even more convinced that it’s something to do with the throttle linkages but I’m fairly new at this and have never messed with any of these linkages before. You guys help is greatly appreciated…