Wow. Old thread, new-ish info not so much a reawakening as a complete rezerection!
Merc clamshell 60Hp. Assorted bits of engine between 197x & 1989 Transom mount autolube disposed of.
PURCHASE PRICE: £200 (rebuild price £1500)
Servicing price - Call it an impeller & 20 mins of my time! (ignoring the rebuild!)
Fuel Consumption: 0.82L/kn mile, 0.84@ 25:1 running in
Oil consumption- 1/50th of 0.82L/mile.
Issues. - Total rebuild after it destroyerd itself. Solved (I hope) by rebuilding to latest build spec.
It's a museum. But my transom is rated (apparently) to 110kG, it ticked a lot of boxes. Early versions were prone to self destruction. Whether all the improvements work or not, you may need to wait another 4 years to find out....