Are AMC engines any good ?
Like any engine they are as good as the maintenance they receive. That said, they do not have a good name generally. The 150cc engine (15T) is conventional in design and though a little crude it is a good unit. Watch out for the left hand thread securing the flywheel to the engine shaft. The threaded end of the shaft is not very substantial and is easily damaged – especially if you try to undo the nut the conventional way. Remember – left hand thread – it undoes “clockwise”. The 175, 200 and 250cc engines suffered mostly from piston problems. There seems to have been problems with the conrod destroying the bottom of the piston skirt and also with piston rings breaking up. The unconventional porting arrangement in the cylinder wall may have given piston rings a hard time – especially when wear became apparent.
