ELECTRICAL
8.11
Alternators
The 6 pulse alternator system is the number of AC sine waves created by the alternator in one revolution of the
crankshaft. For example, in a 6 pulse system, the alternator will create 6 pulses, or 6 complete AC sine waves, in
one crankshaft revolution. The tachometer reads these sine waves, therefore giving you accurate RPM readings.
A 3 pulse tachometer cannot be used on a 6 pulse system. If this is done, the tachometer will read double RPM.
Refer to the following text for applications.
Polaris Snowmobiles:
All Polaris Domestic twin cylinder engines 6 pulse..........................
Fuji 3 cylinder engine 6 pulse............................................
Fuji Fan Cooled EC45/55PM 6 pulse......................................
Tachometers:
Tachometers for snowmobiles will have an identification marking on the back side. For example: The tachomter
for a 600 RMK will have “6 pulse” (or 6P) written on it.
6-Pulse
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