Crossflow vs. Looper

[THEFERMANATOR]

Originally Posted by Skools Out

do the carb butterfly's have 2 or 3 screws holding them in? 2 will be 200 Hp *carbs and 3 will be 225 Hp carbs.

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).

[Skools Out]

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).

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.

[THEFERMANATOR]

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).

Disreguard most of this statement :-[. I went and re-checked my current 140 carbs and they do have 3 screws in them. But I'm 99.9% certain(can't be 100%, I threw them out when I started my last engine build needed space) that my 85 carbs had 2 screws in them. I know they were not 120 carbs because I compared them to a set of 120's before I got my 87 140 carbs. They had different holes drilled in them than the 120's had, but they did use pretty much the same butterfly size as the 120's.


Let the beatings begin.

[Skools Out]

lol it's ok here's a few of my spares

these are 200 carbs.







these are the 225 carbs






notice how much larger the throats are on the 225 carbs they are hugh compared to the 200's

[THEFERMANATOR]

My 87 carbs look like your 225's, but my 85 carbs' butterfly's looked NOTHING like either of them. I remember them having smaller throats than my current ones, but they had a big cut on them on the edge of the butterfly and only 1 big holed drilled in them. I had nothing but problems out of the 85 carbs with high idle. I could get it to idle at around 5-600 in gear and it would race up to around 1500 in neutral. I kne they had some vacuum leaks in them as well, but the plastic wasn't warped.

Oh well. Switched out to my 87 carbs, rejetted them and aint had no problems since.