The link is in any of my posts in the Inner Sanctum – upper left corner . . . 😉

One very BIG advantage to modular design of the Early Kiekhaefer’s, compression is irrelevant.
Damaged cylinders or pistons can be replaced. Replacements parts can be sourced
from a range of models and years. No need to be concerned with over size rings or pistons
Corvair air cooled engine had same concept of replace problem cylinder, piston and rings
rather than get into machining and stocking oversize parts. VW beetle also a modular
design that make rebuilding a remove and replace concept
Louis

they can be run without the clutch. it slipped because your prop was not tight enough. put in a new shear pin tighten down firmly add the cotter pin. square up the slots if you need to. you will be fine. ran that way for years back in the 50’s as a kid.

Running with sheer pin instead of the clutch assembly calls for a minor change to pin
in drive hub…a shorter pin and a spring that will fit into groove in drive hub to retain pin.
There is a second hole in prop shaft to accept a sheer pin to engage notches in prop/
Prop shaft is a hold over from models before adoption of clutch.
I would keep an eye open for another propeller and a clutch as having a spare prop is
always a good idea. Clutch mostly avoids having to do on the water repairs.
Louis

to engage slot in prop hub.
I suggest a brass sheer pin instead of steel,

Louis