Hello Rodeobob and Shaunw

These are very helpful comments.
I think the post demonstrates how prejudices are generally founded in personal experience.
It would appear that these modern Tecumseh engines were a good motor, but with their own
design & service weaknesses. Pretty much like all motors...

Sean, this Supaswift is one of the great lawnmower chassis designs.
[Very similar to the Rover Model 29 base]. The thin frontal area in the front safety skirt
meant they were great for shock absorbing under commercial contractor use. The Scott Bonnar
520/720 - in contrast - was a poor design for commercial use. Your wife knows what she likes;
and for good reason.

All very Ultima
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JACK