Johnson 90hp and 110hp are they the same engine ?

ril0

Seaman
Joined
Aug 23, 2003
Messages
59
Are 1980s johnson 90 and 110 hp the same engine but just tuned a bit more for the 110 hp have a chance to buy one of each the 110 has no spark so wanted to use parts from 90 to make good one.
 

Chinewalker

Fleet Admiral
Joined
Aug 19, 2001
Messages
8,902
Re: Johnson 90hp and 110hp are they the same engine ?

They are quite similar. If they're the same years, then the ignitions systems should swap part for part. If they're a few years apart, there may be some subtle differences, but should swap as complete systems. 95% of the other parts are the same... again, within a given year.
- Scott
 

ril0

Seaman
Joined
Aug 23, 2003
Messages
59
Re: Johnson 90hp and 110hp are they the same engine ?

on another tack if i could get them both running would they run succesfully as twins despite the different horse powers maybe tune or detune one slightly
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Johnson 90hp and 110hp are they the same engine ?

probably, you would have to tweek them, timing, props. they both need to run in their proper wide open throttle range.
 
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