Vintage Mercury Kiekhaefer Outboard Mark 7 KE4 52-22478 Clutch Driven Member NOS Trim Parts so these were only used

so these were only used for 2 years

This item is similar to subsequent flywheel housings

31093 Midsection Exhaust Housing Extension Tube (Short Shaft)

) GM 327 V-8 1968-1969 2314301 THRU 2639854

0L 140hp 3

Vintage Mercury Kiekhaefer Outboard Mark 7 KE4 52-22478 Clutch Driven Member NOS Trim Parts so these were only usedItem Description Mercury Part Number 52 22478 Clutch Driven Member for Mark 7 KE4 (and possibly others). Your's should look the same, I am not quite sure what it's from but KB4 & KD4 is my best guess at this time. There wasn't many that had this 2 part gearcase. I just don't have the references to pinpoint this exactly. Purchase with confidence! General Disclaimer (please read) These are New Old Stock Parts from a large mercury Mark & K models cabinet