I have an early model Connie that has worked fine for a couple of years.  However, now it gradually slows down after a few hundred feet of running.  Put in reverse and it seems fine.

Tore it down checking for binds and lube opps.  Nothing found.  Put an ammeter on it while on the test rollers and watch the current draw go from about 600ml to over 900 as the motor slowed down.  Lifting the weight of the engine off the rollers dropped the current to 300 MA range.  Behaves like a motor getting over heated.

Anybody else seen this?  Is there an improved motor available?

Thanks!!