4-CYCLE OVERHEAD VALVE ENGINES - Small Engine Discount

CHECKING THE SYSTEM: To check the system,
disconnect the plug and measure the D.C. voltage at
the red wire terminal (diag. 16). Measure the A.C.
voltage at the yellow wire terminal. With the engine
running, the minimum values should be:
MODELS OVM/OVXL/OHV12.5
3 Amp D.C. (Red wire)
RED
2500 R.P.M. - 8.0 Volts D.C.
3000 R.P.M. - 11.0 Volts D.C
3600 R.P.M. - 13.0 Volts D.C.
YELLOW
DIODE
5 Amp A.C. (Yellow wire)
D.C.
2500 R.P.M. - 8.5 Volts A.C.
3000 R.P.M. - 11.0 Volts A.C.
3600 R.P.M. - 13.0 Volts A.C.
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MODELS OHV 13.5 - 17.0 (3/5 amp split)
3 Amp D. C. (Red wire)
2500 R.P.M. - 6.5 Volts D. C.
3000 R.P.M. - 9.0 Volts D. C.
3600 R. P.M. - 11.0 Volts D. C.
5 Amp A.C. (Yellow wire)
2500 R.P.M. - 15.0 Volts A.C.
3000 R.P.M. - 18.0 Volts A.C.
3600 R.P.M. - 22.0 Volts A.C.
DIODE
If the above minimum values are noted, the system is
okay. Check for defective lights, wiring or switches. If
less than above values are noted, pull back the
protective shrink tubing from the diode. Using an A.C.
voltmeter, check the voltage going into the diode from
alternator, at the lead on the alternator side of the
diode (diag.17). If low or no voltage is experienced,
replace the alternator.
A.C.
YELLOW
RED
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Models OVM/OVXL/OHV12.5
(Red between Engine and Diode)
With the engine running, the minimum values should
read:
2500 R.P.M. - 20.0 Volts A.C.
3000 R.P.M. - 25.0 Volts A.C.
3300 R.P.M. - 26.5 Volts A.C.
3600 R.P.M. - 29.0 Volts A.C.
DIODE
A.C.
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