Thanks Buccaneer, unfortunately I have a copy of this version but it does not include the1959 motors with the redesigned mid-section and low mounted water pump. I believe this was the only year that McCulloch manufactured the 7.5 in this configuration before they came out with the low profile Fishing Scott in 1960.
IIRC, McCulloch still made the10 HP motor in 1960 which I believe used the same mid section as the ‘59 7.5. If so, it would certainly be beneficial if I could get a copy of the service information on it.
Again, thanks so much for your help.