Tachometer: Testing and Inspection

Tachometer Inspection:

1. Insert paper clip into the engine revolution speed detection terminal provided in the engine compartment, and connect the engine tachometer to the inserted paper clip.

CAUTION: As the tachometer is negative grounded, do not connect battery conversely to prevent damaging transistor and diode.

NOTE: For tachometer inspection, use of a fluxmeter-type engine tachometer is recommended. (Because a fluxmeter only needs to be clipped to the high tension cable.)

2. Connect the engine tachometer and compare the engine tachometer and tachometer readings. Replace tachometer if difference is excessive.
Standard value:
1,000 ± 100 rpm
3,000 ± 150 rpm
5,000 ± 250 rpm
6,000 ± 300 rpm

CAUTION: The engine speed signal output from the engine is one-third of the actual speed. When the engine speed is measured, make sure that the engine tachometer is placed in the 2-cylinder range. (The real speed is indicated.)