What's the truth on making a 90 out of a 1977 70 hp Johnson

doug1257

Cadet
Joined
Jun 29, 2013
Messages
8
I was told my 1977 70 hp Johnson can easily be converted to 90 hp.
Any truth to that? If so what has to be done?
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: What's the truth on making a 90 out of a 1977 70 hp Johnson

Get another cylinder. LOL
 

fireman57

Captain
Joined
Aug 24, 2004
Messages
3,811
Re: What's the truth on making a 90 out of a 1977 70 hp Johnson

They are easily convertible to a 90hp if you can find someone with a 90hp that will trade you for your 70. These scams have been around for years.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,937
Re: What's the truth on making a 90 out of a 1977 70 hp Johnson

Any truth to that?
No... the only 3 cylinder Johnrude that made near that hp was the SST60/70.
 
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