On many engines fitted with a fan the blades are painted the same colour as the cylinder block and radiator honeycomb. Thus, when the engine is running the fan is practically invisible, and when making adjustments there is the risk that one’s fingers may come into contact with the revolving blades —with painful results. It is a good plan, therefore, to paint the blades a bright colour, such as red, which will enable them to be seen clearly at all times. 111-fitting piston rings not only allow gas to reach the crank case, but on the suction stroke air is drawn up from the crank case, thinning the fuel mix- , ture and causing the motor to miss.
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https://paperspast.natlib.govt.nz/newspapers/THD19321001.2.74.5
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Timaru Herald, Volume CXXXVII, Issue 19302, 1 October 1932, Page 12
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117Untitled Timaru Herald, Volume CXXXVII, Issue 19302, 1 October 1932, Page 12
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