Saving Old Seagulls

Maybe some more oil than usual. Run under load (at the back of a boat) and in varying rpm.

How did you manage to cut copper gaskets? I mean to form the ring around the bore. In addition the head gasket is 0.9mm and the base gasket 0.25mm thick. Anything different will have some consequences.
I do ...

any idea how the new rings should be run in?

well....had a few hours to spare, so decided to strip it back to the beginning...i cut all new copper gaskets, for the front and back of head,
reinserted the piston, fired it up...after one pull, alls working hunky dory....must have been sucking in air from back gasket,
tried it out in bin, pumping ...

its a f and no i did not touch the ignition...thanks..

going to redo the gaskets , will give it another go....watch this space, mark..thanks all.

when it was stripped down ,I made sure that the both faces were cleaned up on the head, wet & dry sandpaper on a flat surface..blew it all clean with air , then used a silicone like you said, I was thinking of spraying with leak detecting spray (i use this for plumbing)got some in workshop...thanks ...

coming back to the crankcase question, how would that affect the performance...mark

right...tried mates carb, still does the same, starts ok, runs for few minutes the revs die, then cuts out... i'm using a mixing bottle for mixture..25-1
any idea's? mark.

yes the crankcase is sealed....mark.

how should the carb be adjusted?.. yes it sneezes, but not all the time...carb was cleaned and all jets blown with air...
i'm using a 25-1 mix fuel and outboard oil mix, cannot tell if the needle is for this or 50-1...
cannot see any numbers on needle or in carb...thanks mark.

thanks for quick reply ,yes. it sounds like its getting starved of fuel..but seems flooded when i remove the plug? also i see a a spray of fuel now and again coming out of air intake?....but how do you reduce the fuel feed...after a few minutes of being left alone, it fires ok again...should there ...

hi all just rebuilt my Forty Featherweight , blocked head...now cleaned, and looking like new..I managed to break a piston ring, so replaced both rings, engine will only run from cold, with first pull...then cuts out after a few minutes ? seems like its getting flooded? ..I cleaned all the carb, i ...