OutdoorKing Repair Forum Forums The History Forum Model Histories ENGINES KIRBY - HK25 and HK30 Engines

Hello ODK History Lovers
Kirby engines were a popular choice for lawnmower manufacturers in the 1960s
and 1970s. Made under licence from North American Tecumseh, they would power
Australian-made rotary and reel mowers in vertical and horizontal shaft
configurations.

This article discusses the most popular small horizontal shafts - the HK25 and
HK30 engines. Many enthusiasts would know these engines powered the early Victa
Imperials, Rover Thoroughbreds, and Scott Bonnar Model 45s.




TO BE CONTINUED ...

PART TWO - Specification
The small HKs were 125cc with alloy crankcase and cylinder.
The cylinder had a alloy cast iron or sintered iron sleeve.
They were mechanically governed and had a ball bearing on the PTO side.
These were quality engines, many still being used regularly today.

PART THREE - Operating Manual
This 1970 Operating Manual is from my collection and covers the HK25, HK30
and HHK40. As always, it is available as a download for personal use.

PART FOUR - Parts Manual - Scott Bonnar
This mid-1970s Parts List is from Scott Bonnar. It is a handy list because
it includes both the SB and Kirby part numbers. As always, it is available
as a download for personal use.