Jack thanks heaps for the parts list. Both mowers use the same chain. Someone had mucked with the axle adjustment on the colt 5 and added a half link. Amazing how much the chain wears and causes it to get heaps longer. Learnt to count the pins not measure the chain. The colt major is 72 pins long when it is joined. The colt 5 is 78 pins long when it is joined and axle centered on the adjustment slots.

Both chains are common half inch chain. No 41, Pitch 0.500inch 12.70mm Roller dia 7.75mm Roller width 6.35mm Inner plate thickness 1.27mm. Cheap common chain.

A lot of movement forward and back in the sprocket on the axle when the chain is off and on? Will look at it some other time. Guessing key way flogged out the alloy wheel hub maybe.

Thanks again Jack
Rudolf

Last edited by rudes; 13/10/15 07:10 AM.