TM10-4320-226-14b. Tachometer/Hourmeter. The tachometer/hourmeter is a dual purpose gauge that operates when ther engine is running.When S1 is on(Emergency Switch pulled out) power(voltage) is supplied by the alternator(G1) to thetachometer/hourmeter. The tachometer converts this power signal to indicate engine rpm while the hourmeter convertsthe power signal to indicate engine operating time in hours.1.14.2.3.1.6. Cold Start System. The cold start system operates on electrical signal from the temperature switchmounted on the side of the engine. When the temperature switch is closed(closed at 40 degrees F and below) and theengine started, the solenoid valve opens and starting fluid from the can is injected into the intake manifold through thetubing as long as the starter is energized.Figure 1-5.1.Cold Start System (Model 350 PAWN).1-12.2Change2
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