johnson 50 has no low end

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willard887

Seaman
Joined
Jan 30, 2012
Messages
64
I've looked these forums over but still need help. My 1976 johnson 50 horse labors to get on plane once its up it's up it runs good it just struggles to get there. Ive changed props and pitces but no help. My last 50 would jump out of the hole i dont know whats going on. Oh by the way its on a 16 foot lowe roughneck very light boat. Maybe timing?
 
oldcatamount

oldcatamount

Lieutenant Commander
Joined
Apr 4, 2010
Messages
1,740
Re: johnson 50 has no low end

Sounds like it's starving for fuel to me. Has it been awhile since the carbs were cleaned and re-built?
 
B

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: johnson 50 has no low end

Pull one plug wire off at a time when you have the prob and see if it's firing on both cyls.
 
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willard887

Seaman
Joined
Jan 30, 2012
Messages
64
Re: johnson 50 has no low end

its firing on both cylinders the damn thing just has no get up and go. this model has the big lower unit on it, the larger diameter shaft. whereas the old one had the small lower unit. I've not been able to find the sweet spot in it I want my old one back! but it slung apart hard. Does the size of that lower unit make a difference you think?
 
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willard887

Seaman
Joined
Jan 30, 2012
Messages
64
Re: johnson 50 has no low end

trying to find a good used 1980's or 90's model 50 but they are hard to find here.
 
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