Hi Grumpy, sorry forgot to do the measuring bit will get on to it asap. There is a mark on the tappet, it is a straight line about 4-5mm in lenght. Will try to get a picture. The weight and pin both move freely with no sign of sticking anywhere.Did put motor back together without base and turned motor over by hand, watched the pin closely as it went past the tappet,no movement but the tappet itself turned in a clockwise motion. Put it all back together and tried 3 different settings; closed-80psi,, .004-120psi,, .008-145psi. ( sorry bout the stuff around Grumpy, theres not enough days in the week to get done what i need.)
