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Originally Posted by THEFERMANATOR
My 140(same carbs as a 225) only have 2 screws holding the butterflys in, and all of the 225's I've worked on have only had 2 screws holding the butterflys in. These were all 91 and older motors though. I know the throttle plates are different in between the two. They have different size air cuts in them, and are 2 different sizes. Except for 85. In 85 they kept the same carbs for both 120 and 140. The 120 had 57 main jets with 18 BTDC timing, and the 140 used 59 main jets with 22 BTDC timing. But OMC quickly found that this led to cylinder overheating(hence how I came abouts my 85 140).
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those aren't 140 nor 225 carbs those are 120 and 200 carbs. the 140 and 225 carbs all have 3 screws trust me i have 6 - 225's currently , 5 - 140's, 1 - 200, and 1 - 120
i have 3 extra sets of 200 carbs and 4 sets of 225 carbs. the 120 used smaller reeds and smaller carbs the 130 uses smaller reeds and larger carbs and the 140 uses the large reeds and large carbs.