IGNITION FAULTS
' If an engine exhibits a tendency to run very erratically at low speeds on top gear—say between 10 and 15 miles per hour—it indicates a defect in the ignition system. “Snatching,” as it is called, arises most commonly from one or more ol the sparking plugs having too wide or too narrow a gap. Too wide a gap offers a high resistance to the passage of the spark, and misfiring results at low speeds ; one that is too narrow gives rise to a spark that may fail to ignite the mixture. The gaps should be set in accordance with the makers gauge. A dirtv or ill-adjusted contact breaker will also cause snatching; so will “tracking” on a wipe distributor, that is, carbon on the insulation between the metal segments. Another cause is retarding the ignition too far, for while if the snatching occurs only in accelerating the car it is probable that the accelerator is being depressed too far—it ought to be depressed gradually with the increase of speed.
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https://paperspast.natlib.govt.nz/newspapers/HAWST19310103.2.109.2
Bibliographic details
Hawera Star, Volume LI, 3 January 1931, Page 12
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171IGNITION FAULTS Hawera Star, Volume LI, 3 January 1931, Page 12
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