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Our offices are closed for Labor Day. Orders placed online will be processed on Tuesday 9/2/2025.

Our offices are closed for Labor Day. Orders placed online will be processed on Tuesday 9/2/2025.

Northern Lights Voltage Regulators and Rocker Switches for 643 Series Generators

Our huge selection of Northern Lights Voltage Regulators and Rocker Switches are sure to help with your M643 Generator needs.

If you do not see the Northern Lights part you are looking for, please use our quote request form or call us at 888.687.0539: our knowledgeable inside sales staff will gladly assist you.


ALTERNATOR - M16C / M20CL / M643 / L984 (12V, 14A)

$672.09

FUEL SHUT OFF SOLENOID - M673L2 (12V, STANDARD GROUND)

$355.23

OIL PRESSURE SWITCH - M773LW2 / M773LW3 / NL773LW3 (14.2 PSI, 1/8" BSPT)

$33.08

GLOW PLUG - M16C / M20CL / M20CR / M20CR2 (12V)

$31.15

VOLTAGE REGULATOR - M643 (D.C.)

$516.24

RELAY - M773LW2 / M773LW3 / NL773LW3 (12V, DC, 50A)

$6.48

OIL PRESSURE SENDER - M773LW2 / M773LW3 (80 PSI, STANDARD GROUND, 1/8" NPT)

$96.03

TOGGLE SWITCH - M643 / M643K / M643M / NL643 (SPDT, BLACK)

Surplus Item - Special Pricing

$13.90

CIRCUIT BREAKER - M16C / M20CL / M643 / M673 (15A, DC, PUSH BUTTON RESET)

$46.73

WATER TEMPERATURE SENDER - M773LW2 / M773LW3 / NL773LW3 (250DEGF, 3/8" NPT)

$31.07

A.C. VOLTAGE REGULATOR - M643 / M643K / M643M (DS-71-2, TF-II-18 AND TF-I)

$724.80

CIRCUIT PROTECTOR - M643 / M643K / M643M / NL643 (30A, 240V, A.C., 2 POLE)

$295.62

CIRCUIT BREAKER - M643 (30A, 250VAC, 50/60HZ W/ AUXILIARY CONTACTS & CONNECTION LEADS)

$287.50

VOLTAGE REGULATOR - M643 / M643K / M643M / NL643

$600.16

A.C.VOLTAGE REGULATOR - M643 / M643K / M643M / NL643 (DS-71-2K W/SLUG)

$663.58

CARBON BRUSH ASSEMBLY - M643 / M643K / M643M / NL643 (TF-II / III AND TF276K)

$75.37

ROCKER SWITCH - M643 / M643K / M643M / NL643 (SPST)

$15.87

ROCKER SWITCH - M643 / M673 / M673D / M673L

$29.66

OIL PRESSURE GAUGE - M643 / M643K / M643M / NL643 (80 PSI, 12V)

$65.59

ENGINE TEMPERATURE GAUGE - M16C / MP150C / M643 / L984 (250DEGF/121DEGC, 12V)

$39.09

TEMPERATURE SWITCH - M673 / M673L / M673L2 (95C/203F M16X1.5 STD GROUND)

$168.03