Classic AquaSport

Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter => Engines & engine woes => Topic started by: Gipper on February 15, 2006, 09:07:03 PM

Title: More horsepower from outboard
Post by: Gipper on February 15, 2006, 09:07:03 PM

Is it true that I can get more horsepower out of my Johnson 90hp simply by installing larger carbs

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Post by: RickK on February 16, 2006, 05:29:44 AM

I was told by a mechanic that a 90 and a 115 are the same block and the only difference is the carbs.  Go talk to a mechanic or go visit http://www.themarinedoctor.com/cgi-bin/YaBB.pl and search the forum / ask him.

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Post by: Gipper on April 16, 2006, 03:33:46 PM

I talked to a hard core guy that rebuilds old Mercs.  He said that it was all in changing jet sizes in the carbs.  Anyone ever hear this?

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Post by: JimCt on April 16, 2006, 05:24:39 PM

Merc 75 & 90 are the same except for the carbs I'm told.  Don't know if this holds for other makes.

Title: More HP
Post by: GoneFission on April 17, 2006, 09:09:01 PM

Or you could just put a set of higher horsepower decals on the motor - like some others have done...  :wink: