Ok all I think an important point has been missed here. Greg, Jens, Andy, and most likely a few others out there that do not post on the forum. have the skills and machine tools to "fix" the Enya 4 stroke diesel ( well maybe not 100%) for most operating conditions and convert other 4 strks . Most modelers expect to take a product out of the box and it works. Enya did not do this with the 41CD having the compression high enough to start with and using adjustable compression instead of a blocked off glow plug really is a little hard to believe for a $300 engine. It should arrive that way; really should be out of the box and go without you horoscope being right and the stars lined up in the right position
and Mr Davis does deserve a lot of credit for his efforts over the last 32 years or so take a decent glow engine 2 stk,
remove 4 or 6 head screws bolt it (conversion head) an instant diesel no hassel, and yes there is always some that cannot properly adjust a compression screw let alone a carb but most figure it out reading directions help too any engine gas, glo or diesel
As I stated before have lots of Davis heads, irvine diesels, MVVS diesels. PAWs, and the enya 11,15,25 diesels which are great
bottom line they screwed up on the 41
martin
and yes some of the classics paw. small MVVS do have a contra in the cylinder which will sometimes hang up
but loosenig the screw of the top it will pop up as it runs and you can adjust, only proplem I had was my MVVS 15 that was so stuck had to take engine apart and drive out with a dowel and hammer after I got it back together it did not repeat
the problem contra in head still a better idea