The motor seems to have a metric size driveshaft. 14mm is equivalent to 0.551″. The motor was built in Peterborough and we were well on our way to going metric back then.
This reply was modified 3 years, 7 months ago by dan-in-tn.
This one appears to have the larger gearcase from the 22CI engines…Hopefully the author of this post has ordered the correct parts book I found for him…