RE: Puff of smoke when upshifting...

["Randall" <tr3driver@comcast.net>]

> I know I've seen the answer to this before, but can't seem to
> track it down
> right now.  What does a puff of smoke (from the exhaust) during
> an upshift usually indicate?

Generally worn intake valve guides, or in the case of a TRactor motor,
possibly that someone has fitted the external oil feed to the rocker shaft.

Randall