OutdoorKing Repair Forum Forums The History Forum Model Histories SCOTT BONNAR Models MODEL 22 & 31 - The First Spincuts - c1956 & c1958

PART TWO & THREE - SPECIFICATIONS

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PART TWO - MODEL 22 - The Spincut 16"

The first Spincut was a 16 inch machine with a solid alloy base and sort-of folding handle.
It was powered by a 2 h.p. British JAP engine with snorkel air cleaner and lanyard start.

The wheels appear to be solid rubber mounted on metal hubs. Height adjustment was primitive,
requiring bolt removal on all four corners of the base. Three pitched blades were said to give
a 'suction lift' to aid grass cutting.

The recommended price in 1957 was £58/17/6, somewhat more expensive than the Victa Rotomo's £49/18/-.

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PART THREE - MODEL 31 - The Spincut 18"

Significant changes were made with the second Spincut model.The new pressed steel base was re-designed
and enlarged to 18 inch, and was released in late 1958 for the 1958-59 lawnmower season.

This machine would have the fashionable semi-pneumatice wheels mounted on plastic hubs,
with the rear wheels being of a larger diameter. It had a new design folding handle.

The height adjuster was somewhat improved. Now it was dual point, in having an adjuster for the
left and right sides. It was awkward in having two adjusting and two locking knobs.

The 18 inch machine was the first to be fitted with a vertical shaft version of Scott Bonnar's
own 155c.c. two-stroke engine. At a rated 4 h.p., they claimed it to be the most powerful
rotary mower on the market. Interestingly, it had a half-length snorkel system for air filtration.

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ADVERTISEMENTS

In this 1958 advertisement both machines were being offered. Of particular note is the
reference to the 16 inch being offered with lanyard or kick starter.




In this 1959 advertisement we, again see both size machines, with the focus clearly on the
larger one. Note the new 'proper' folding handle and half-snorkel. Note the height adjuster is
now dual point, but awkward in having two knobs (one for locking).