Hi Peettee,

I know where your coming from in regard to tolerances, but you must remember that this is a domestic lawn mower we are discussing here...The Scott Bonnar model 45, produced in 3 sizes...14", 17" and 20" some with different engine requirements and makes (ie. Kirby and Briggs) the height of the PTO shaft might have varied some.

To compensate for this, the bearing prior to the 12 tooth primary chain sprocket, is a double row self aligning type, which works very well in this configuration.

Re: debate on the counter-weight device, well the jury's still out on that one, we are waiting for members to post of their experience in the field. wink
All good stuff, mate!
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin