Effingham in Surrey -- shouldn't that town be twinned with Effin in Ireland.
I was in Cork bus station once when a Priest asked where the Effin bus was.
Best of luck with the engine -- that is an Effin task.
LLS c 1961 on a crescent 42 boat c 1980 + wspcl c 1976 + 102 SD8561 c 1944 + 102 ACR 1948
I wish I could pick the easy ones, you try getting someone to cut new gears for you, or finding & changing the imperial big end needles & having new pins made for a 5 piece 2 cylinder crank, with having to become a rent grandad.
Make it idiot proof and someone will make a better idiot.
Could you fill us in on how these engines work? Is there two different cavities in the crankcase for each piston? Do both conrods use a common crank pin?