FUEL PUMP CALIBRATION - CONTINUED
Fuel pump (2)
Once 8-inch HG vacuum setting is obtained, do not change setting. Readings will
fluctuate during other tests. Note the increases or decreases as they occur.
Test governor cutoff rpm as follows:
Open fuel flow control valve (4)
Increase pump speed to 2000 rpm.
Depress and release FAST (9) or
SLOW (10) button to obtain 2000
Adjust fuel flow control valve (4) to
obtain 8-inch (20.32 mm) HG vacuum
on no. 2 vacuum gage (11).
Increase pump speed to 2100 rpm.
Open the fuel flow control valve (4) and
place the selector valve (12) in
Increase pump speed until the fuel
pressure drops. Test stand tachometer
(13) reading should be 2130 to 2150
T A 2 4 2 5 6 4
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