Correct carb for herc IXK3

[Mr E. Carburetor]

Hey internet, I just acquired an Oliver crawler and am trying to find the correct type of carburetor to replace the one it came with. Someone had a knockoff Briggs and Stratton 8hp on it that worked but leaked gas all over the mag. I tried buying a Marvel Schebler on ebay but it was the wrong size (for a much larger manifold). Does anyone know what type of MS carb or Tillotson carb will work? I believe it is a late 40's HG42 sn on the engine plate is 1259791. I am trying to avoid buying the 400$ Zenith. Any help with serial numbers etc would be appreciated. I am aware that I am not the best at written communication so feel free to ask me to elaborate but no lectures.

[Jethrow]

There is a YouTube video showing a running IXK-3 engine at https://www.youtube.com/watch?v=8FwCi7tat9A.

If you stop it 10 seconds in , you can make out the carburetor marking.

[Lowspeedlife]

TSX 403 should be the correct MS carb for an HG. The OC3 had the TSX 406 carb. The 406 has a second fuel adjustment screw, seems like it is a high speed mixture adjustment screw, if I remember correctly. The Tillotson was a  model YC2B carb but you usually need an adapter that moved the carb down & back to keep the float bowl from coming into contact with the magneto & they were known to be temperamental & difficult to adjust properly.

If anyone has better info or I am wrong please speak up.

Scott R.

[Jethrow]

My OC3 crawler has an IXB-3 engine and came with a TSX 403 carb.  I rebuilt the carb but was not impressed with the performance so I replaced it with a TSX 406.  If you post the stud spacing and throat opening of your manifold, I can compare it against the TSX 403.

[Mr E. Carburetor]

Thanks, I ordered a rebuilt tsx from Zimmerman, He told me a 403 or 406 would work. I'm not sure which one he sent. I guess I should ask. He did say that the Tillotsons weren't the best. Anyway, thanks for the replies.

[Lowspeedlife]

Hummmm, Jethrow , did I see a Trasco aux trans set up in the background of that picture?? Would love to get my grubby little paws on one of those!