by wz507 » Tue Jan 14, 2020 11:04 pm
I believe the middle one is for KH and the shortest is for a WL.
Attention - The above red text suggestion has been found to be incorrect - apologies. Continue reading below for updated information. Jan 24, 2020.
Measurements were made on 4 stools from a ’56 KHK and all stools were found to be 1.064” long. A request was made to a friend to measure his stock of K and KH stools and he reported lengths of 1.435” and 1.064” respectively for the subject stools.
The above reported difference in stool length aligns very well with the difference in stroke specifications between the K and KH engines. The KH engine has 0.750” longer stroke, so the KH cylinder is 0.375” taller (0.750/2 = 0.375”) than a K model cylinder. All other things be equal, for the longer KH cylinder the stool would then have to be 0.375” shorter to position the top motor mount at the same relative height in the frame. Thus, if the K stool is 1.435” long, then the KH stool would have to be 0.375” shorter, i.e., 1.060” long (1.435 – 0.375 = 1.060”), which is within a few thousandths of an inch of the results reported above for KH stool length.
These results suggest that the difference in K and KH stool lengths might now be properly identified. However, the mystery still remains regarding the 1.128” intermediate length stool and what it fits. Perhaps the only option remaining is a stool for the 45” WL series engines?
Last edited by
wz507 on Fri Jan 24, 2020 7:20 pm, edited 2 times in total.