Model A pistons
Results 1 to 2 of 2

Thread: Model A pistons

  1. Top | #1

    Join Date
    Mar 2019
    Last Online
    03-17-2019 @ 06:03 PM
    Thanked 0 Times in 0 Posts

    Model A pistons

    We have an old model A ,1943.The pistons are history having been stuck for ever.I have some others ,but they are of different length.The originals were approx 7 1/2 inches long .The others are approx 7 3/4 and 8 inches long.Were the longer ones from the 321 engine ?the tractor is a 1943 model,so should be 309 cubes.Did the 321 cube model ,with the longer stroke ,have shorter rods,or a different crankshaft throw? Thankyou.
    Last edited by Pukeko; 03-17-2019 at 12:31 PM.

  2. Remove Advertisements

  3. Top | #2
    tlock0331's Avatar
    Join Date
    Jul 2013
    Last Online
    07-15-2019 @ 12:49 PM
    NE Kansas
    Thanked 28 Times in 26 Posts
    Pukeko, i am not gonna promise what i am about to say is 100% accurate, but i think its pretty close. for the rest of the verification i need to look at my parts manuals.

    1943 A had: Bore/stroke of 5.5x6.75, however, the all-fuel had a compression of 4.45 and the gas was 5.6.

    both all fuel and gas was the 321 ci engine.

    so my guess is that your original is all fuel and the replacements are gas.

    Just a guess....

  4. Remove Advertisements

Similar Threads

  1. Oil on top of Pistons-JD 1050 Diesel
    By billyruh in forum Medium Frame Compact Utility Tractors (MCUT)
    Replies: 8
    Last Post: 06-26-2015, 04:47 PM
  2. What's a better source for 2 cylinder pistons?
    By green and red man in forum Johnny Poppers
    Replies: 14
    Last Post: 06-09-2013, 09:02 PM
  3. Are these true LP pistons?
    By green and red man in forum Johnny Poppers
    Replies: 5
    Last Post: 06-09-2013, 12:04 PM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts