Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.
You have no items in your shopping cart.
This is a genuine Northern Lights Cotter for 643 marine generator sets. This is a genuine Northern Lights part shipped with a 6-month warranty.
INTAKE VALVE - M643 / M643K / M643M / NL643
$24.01
EXHAUST VALVE - M673 / M673L / M673L2 / M673L3
$20.78
VALVE GUIDE SEAL - M643 / M643K / M643M / NL643
$7.68
VALVE SPRING - M643 / M643K / M643M / NL643
$4.52
