Re: Mid 50’s Johnson 25HP runs like crap. Advice needed Home › Forum › Ask A Member › Mid 50’s Johnson 25HP runs like crap. Advice needed › Re: Mid 50’s Johnson 25HP runs like crap. Advice needed vintinReplies: 580Topics: 19 May 29, 2018 at 4:06 pm #76987 Being we are throwing everything we have at this motor: Have you checked the crankcase drain reed system? Have you interchanged all of the upper and lower cylinder ignition components under the flywheel to see if the problem follows the components?