Applied to Modern Internal Combustion Engines. Not from a Railwayman's Viewpoint.

Although the sparking plug is the all important unit responsible for the firing of the automobile and motor-cycle engine (firemen not being required) it was regarded as a necessary evil in the days when motoring and motor-cycling were in their infancies.

Since, there has been a distinct evidence of increasing knowledge among motorists generally of the important part played by sparking plugs in the performance of an engine and it is now definitely acknowledged that a sparking plug is not just a plug.

It is agreed by all that intelligent consideration must be given to the selection of a type which incorporates the correct characteristics to suit the engine which it is to serve.

The greatest difficulty confronting the sparking plug manufacturer is to produce a type which will suit practically all average engines. It is not possible to produce a sparking plug to suit all engines due to the varied difference between exceptionally high speed compression ratio engines as used under racing conditions and the slower speed engine used in the average car and motor-cycle of to-day.

The manufacturers of K.L.G. Sparking Plugs, as a result of years of experience gained on the racing track and in tourist trials, have succeeded to a great extent in overcoming this difficulty by developing the new “K” series which, from the car-owners’ viewpoint, may be classed as universal models.

K.L.G. Sparking Plugs have had an almost unbroken sequence of successes since their entry into competitions on land, sea, and in the air.

Some Noteworthy Achievements.

“K.L.G.'S” have been associated with many notable achievements, the most recent of which were Sir Malcolm Campbell's astounding World's Land Speed Record at Daytona Beach of 245 m.p.h. in his racing car the “Bluebird,” and Kaye Don's Motor - Boat Speed Record of 103.9 nautical m.p.h. in Miss England II. Many notable aviation achievements are also credited to “K.L.G.'s,” the most familiar to New Zealanders being Miss Amy Johnson's, Mr. Frank Chichester's and Mr. Oscar Garden's famous flights.

The importance and design of plugs have already been emphasised and illustrated, but care in manufacture is no less vital and it is to this that the success of K.L.G. plugs is attributed.

Every single plug manufactured is’ subjected again and again to the most rigorous tests, devised in practice to ensure perfect suitability. There is no system of percentage inspection, but each individual plug is submitted in the preliminary, partial and completed stages of its manufacture, to test after test.

(Published by arrangement.)