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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 Spare Parts Kits, Mounts & Seals for 643 Series Generators

Our large selection of Northern Lights Spare Parts Kits, Mounts & Seals 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.


REAR MAIN SEAL & WEAR SLEEVE KIT - M643 / M673 / M753

$254.26

BELT GUARD - M673L / M643

$99.01

SPRING RECEPTACLE - M643 / M643K / M643M / NL643 (1064 STEEL, ZINC PLATED)

$1.17

HEX HEAD CAP SCREW - M643 / M643K / M643M (M6 X 1.0 X 14 MM, WITH LOCK WASHER)

$2.81

HEX HEAD CAP SCREW - M16C / M20CL / M20CR (M6 X 1.0 X 35 MM, WITH LOCK WASHER)

$9.97

CAP SCREW - M16C / M20CL / M20CR / M673

$23.38

BOLT - M643 / M753K (M8 X 1.25 X 25MM)

$9.97

STUD - M643 / M643K / M643M / NL643 (M6 X 1.0 X 20 MM)

$2.48

NUT - M643 / M643K / M643M / NL643 (ROCKER ARM)

$3.28

SEALING WASHER - M643 / M673 (M12, BONDED)

$16.31

WOODRUFF KEY - M643 / M643K / M643M / NL643 (8 MM X 5 MM)

$3.02

O-RING - M643 / M643K / M643M / NL643

$2.11

FILLER NECK O-RING - M643 / M643K / M643M / NL643

$15.40

MOUNTING GASKET - M673L2 / M673L3 / M673LD2 / M673LD3 (OIL PAN)

$24.38

CYLINDER BLOCK INSERT - M643 / M643K / M643M / NL643

$29.30

ROCKER ARM COVER MOUNTING GASKET - M643 / M643K / M643M / NL643

$7.54

CONNECTING ROD BOLT - M643 / M673

$95.81

CRANKSHAFT PULLEY - M643L / M673LD3

$131.25

HEX HEAD CAP SCREW - M643 / M643K / M643M / NL643 (M8 X 1.25 X 25 MM)

$0.51

HEX HEAD CAP SCREW - M643 / M673 (M8 X 1.25 X 65 MM)

$2.34

HEX HEAD CAP SCREW - M643 / M673 (M8 X 1.25 X 16 MM)

$0.84

CRANKSHAFT HEXAGON HEAD M6X1.0 X 20MM - 643 / NL643 / M643

$0.19

SEALING WASHER - M643 / M643K / M643M / NL643 (M14, ALUMINUM)

$8.38

SEALING WASHER - M643 / M643K / M643M / NL643 (M10, COPPER)

$15.87

SEALING WASHER - M643 / M643K / M643M / NL643 (M6, COPPER)

$0.98

HEX HEAD NUT - M16C / M20CL / M20CR / M20CR2 (M8 X 1.25)

$0.14

HEX HEAD NUT - M643 / M643K / M643M / NL643 (M6 X 1.0)

$0.05

BACKING PLATE - M643 / M673L

$33.40

FLAT WASHER - M643 / M643K / M643M / ML643 (M8)

$0.09

LOCK WASHER - M643 / M643K / M643M / NL643 (M8, HELICAL)

$0.14

LOCK WASHER - M643 / M643K / M643M / NL643 (M6, HELICAL)

$0.05

HOSE CLAMP - M643 / M643K / M643M / NL643 (#12)

$4.40

HOSE CLAMP - M643 / M643K / M643M / NL643 (#16)

$4.91

HOSE CLAMP - M16C / M643 / M673 / L984 (#40)

$8.56

GASKET SET - M643 / M673

$662.16

MAIN BEARING - M673 / M673D / M673L / M643 (STANDARD)

$13.69

MAIN BEARING - M673 / M673D / M673L / M643 (STANDARD)

$13.50

KIT, MAIN BEARING (3EA OF PN T436223 & 3EA OF PN T436224)

$84.59

DRAIN COCK - M643 / M673 (BRASS, 1/4" BSPT)

$46.86

INSERT GASKET - M643 / M643K / M643M / NL643

$14.42

HOURMETER - M643 / M643K / M643M / NL643 (RECTANGULAR)

$56.16

O-RING - M643 / M643K / M643M / NL643

$1.83

CENTERBONDED MOUNT - M643 / M643K / M643M / NL643 (100 LB)

$40.29

PLATEFORM MOUNT - M643 / M643K / M643M / NL643 (120 LB)

$114.01

HAND PUMP - M643 / M673

$114.92

VENTILATION COVER - M643 / M673 / M673D (TF-276, WHITE)

Surplus Item - Special Pricing

$65.95

OIL PAN - M643 / M673 / M673D / M673L (MARINE)

$292.95

GASKET - M643

$3.74

OIL FILL CAP - M643 (1-1/4BSPP)

$11.47