Beware of Spark Timed Too Early

NZ Truth, Issue 1203, 20 December 1928, Page 19

Beware of Spark Timed Too Early

Occasionally a car turns out to have its spark timing much too early/with the result that it knocks ; during acceleration and m climbing hills. WHEN this is the case there is a' ten--7 • dency to mistake the knocking for the kind that is caused by an accumulation of carbon. Some engines are run on gas before being shipped and others are driven m over the road with oil m the gasoline, so even the owner of a new car might assume that the unwelcome knocking is due to carbon. Rather than run the risk of damaging the -engine, it is best to go back to the service station and have the timing set right. And while doing so the spark should be retarded at the steering post enough to stop the knocking. An anti-knock gas should be used and the driver should coast as much as possible. An engine with spark too far advanced is injuring itself even if no sharp knocks are heard.