If it is in an experimental plane then a good auto machine shop can
probably do a better job then most "certified" aircraft shops. You can
check most of the weights, ie; pistons, rings,pins bearings, rods,,
yourself with a good gram scale. If you do get it balanced please post
back here to let us know how far out it was.

Ben.
www.haaspowerair.com


abripl wrote:
Its not much flying time around here in SD with temps averaging 0F.

I got my engine (Franklin 6) apart trying to cure a vibration problem
(0.4 IPS) - not extreme but anoying. Is it OK to balance the crank in a
automobile machine shop or are there some tricky things about aircraft
cranks? I know automobile cranks go to 6000 rpm and my aircraft crank
only goes to about 2800. So auto shops should be able to do a more
precise job?