I have a 99 merc 40 horse elpto.. the powerhead for ther 40 thru 60 hp are the same,, the reed block is the same, and the motor is a 3 cylinder.. I took carbs of to clean and compared size of reed block mounting hole and carb venturi and they are the same size. 1.5 inches. what im wanting to do is try and make the motor a 60 hp. The carbs show different PN from 40 to 60 but I dont know what the difference is, maybe bigger bowls on the 60? anyone ever try 60 hp carbs on a 40?
I had a 65 hp evinrude and put 75 hp carbs on it and it ran super strong and idled great.
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