@ smud6ie,..when i got machine it had a honda 300 engine which was knackered hence need to change,think they should have a kohler t 141 or briggs and stratton engine from new but not 100% sure.i cocked up a bit with new engine and got one with 25mm shaft when it should have been 1"so had to put shims round shaft as clutch housing would be to loose.. i made a new plate to hold clutch arm and housing as holes in original plate where in the wrong place to fit new engine otherwise it was a straight swop...
@ john price...i have been looking for centrifugal clutch for a 350,i have seen a 350 machine on ebay that had one ,i was going to get in touch with the seller but by that time it had been sold so lost name,but they must exist somewhere if you hear where from could you please let me know .
acer