Home › Forum › Ask A Member › Old Johnson Motor Identification › Re: Old Johnson Motor Identification
June 14, 2017 at 5:38 pm
#59691
Kees, I think you are right. LT39 & LT10, AT39 and AT 10 are 5 hp with the same 5 hp block used for many years. The 4.2HP block was used in the LT37 and LT38, DT37 and DT38 and discontinued. The 4.2 block has no usual cylinder head but what I would call a cast block. The fitting for connecting the front of the recoil to the block looks like a factory job. I’m going with an LT37-38 with an added recoil, which is the same recoil used on the AT10 but not bolted on the front of the block as is the AT10.