On Wed, 27 Aug 2003 04:28:21 GMT, wrote:

Bill:
I noticed last year at OSH that Rotax changed the head design on the
582 to recirculate the water through the head and block until the
thermostat opens. I have noticed the dip(s) in water temperature as
the engine warms up on several Mini 500's. Since the sensor is in the
head and the sensor has high thermal mass who knows what the
temperature dip was at the base of the cylinder where the cold water
inlet is.
Fetters had a lot of design screw ups but this one appears to be
Rotax's which Rotax has fixed.
John

The main design scew up that fetters had in my opinion (engine-wise)
was using the Rotax 582 at all.

Bill