Re: orifice idle jet 40/50hp motors

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johnyrude200


Replies: 782
Topics: 186
#70645

Good information to have thanks Don.

The carbs do not have any ID tag on them, I will look closer for the stamped ID. They have the larger throat so that is how I arrived at them being 50hp carbs.

I recently discovered that the 40 & 50 hp motors also have different leaf plates, so swapping carburetors doesnt fully convert the motors in either direction.

This seems consistent from at least 1980 through the end production in 2006. So a couple of years ago I had asked how to convert my personal 1993 40hp to a 50 and swapped carbs. I didnt see much of a difference (if any). I will be switching the leaf plates/manifold and retesting this summer.