The Northern Lights 643 engine line groups 2 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 24-28300 | Air Filter | Air filter |
| 185046210 | Alternator Assembly | Alternator |
| 185516061 | DC Voltage Regulator | Avr |
| 22-68003 | A.C. Voltage Regulator | Avr |
| 40-02002 | Drive Belt | Belt |
| 185416130 | Brush | Brush |
| 185416141 | Brush | Brush |
| 22-68304 | Brush assembly | Brush |
| 130306190 | Fuel Filter Assembly | Fuel filter |
| 24-52020 | Fuel Filter | Fuel filter |
| 360720020 | Fuel Filter Element | Fuel filter |
| 052100280 | Gasket (Marine application only, formerly #054109013) | Gasket |
| 11-78301 | Gasket | Gasket |
| 110996590 | Gasket | Gasket |
| 111147100 | Head Gasket | Gasket |
| 111147110 | Head Gasket | Gasket |
| 111147400 | Head Gasket, Thickness = 0.5 mm | Gasket |
| 111147530 | Head Gasket | Gasket |
| 111996060 | Gasket | Gasket |
| 111996340 | Gasket | Gasket |
| 130326051 | Gasket | Gasket |
| 130516069 | Gasket | Gasket |
| 130516101 | Gasket | Gasket |
| 130996070 | Gasket | Gasket |
| 131186100 | Gasket | Gasket |
| 131226170 | O-Ring | Gasket |
| 131426200 | Gasket | Gasket |
| 135996550 | Gasket | Gasket |
| 135996560 | Gasket | Gasket |
| 135996730 | Gasket | Gasket |
| 145996630 | Gasket (formerly #145996420) | Gasket |
| 145996640 | Gasket | Gasket |
| 165886420 | Gasket | Gasket |
| 165996410 | Gasket | Gasket |
| 165996420 | Gasket | Gasket |
| 195906591 | Gasket Kit (includes all keys) | Gasket |
| 198996060 | Gasket | Gasket |
| 198996090 | Gasket | Gasket |
| 25-18307 | O-ring | Gasket |
| 25-18322 | Gasket | Gasket |
| 185366060 | Glow Plug, 12 Volt | Glow plug |
| 140606710 | Drain Hose (Marine application only) | Hose |
| 145536450 | Hose | Hose |
| 145536461 | Hose | Hose |
| 18-00753 | Hose, 3/4" ID x 2-1/4" | Hose |
| 18-58301 | Hose Assembly | Hose |
| 27-78301 | Tube, Raw Water Pump to Wet Exhaust Elbow | Hose |
| 145116180 | Impeller | Impeller |
| 25-12009 | Impeller (includes key #15) | Impeller |
| 25-18325 | Impeller | Impeller |
| 131406350 | Fuel Injector (see detail page) | Injector |
| 131416160 | Nozzle Assembly | Injector |
| 140406310 | Suction Filter | Oil filter |
| 24-02001 | Oil Filter | Oil filter |
| 040116002 | Bearing | Service part / kit |
| 040126201 | Bearing | Service part / kit |
| 040146002 | Bearing | Service part / kit |
| 110666090 | Filter | Service part / kit |
| 110666120 | Filter | Service part / kit |
| 130516084 | Diaphragm | Service part / kit |
| 131606280 | Return Line | Service part / kit |
| 185206082 | Stop Solenoid, 12 Volt - Standard Ground | Service part / kit |
| 185846379 | Bearing | Service part / kit |
| 185846518 | Bearing | Service part / kit |
| 185846520 | Bearing | Service part / kit |
| 20-12003 | Heat Exchanger Element | Service part / kit |
| 22-42043 | Circuit Breaker | Service part / kit |
| 22-68001 | Diode (Excitation Circuit) | Service part / kit |
| 22-68004 | Circuit Protector (A.C. Regulator) | Service part / kit |
| 22-68007 | Circuit Protector (Generator) | Service part / kit |
| 22-68305 | Generator bearing | Service part / kit |
| 25-12027 | Bearing | Service part / kit |
| 25-18300 | Repair Kit for 145016820 | Service part / kit |
| 25-18306 | Repair Kit for 25-18305 | Service part / kit |
| 25-18309 | Ball Bearing | Service part / kit |
| 36-70010 | Oil Drain Kit Complete (includes all keys) | Service part / kit |
| 6305ZZ | Ball Bearing | Service part / kit |
| GM408032 | Slip Ring | Service part / kit |
| 130506140 | Feed Pump Assembly | Pump |
| 131017340 | Injection Pump Assembly | Pump |
| 131017390 | Injection Pump Assembly | Pump |
| 145016820 | Raw Water Pump | Pump |
| 145016860 | Coolant Pump Assembly | Pump |
| 25-12007 | Raw Water Pump | Pump |
| 25-18305 | Raw Water Pump | Pump |
| 36-72002 | Hand Pump | Pump |
| 025100010 | Seal Washer | Seal |
| 025100016 | Seal Washer | Seal |
| 052100030 | O-ring | Seal |
| 052100050 | O-ring | Seal |
| 052100070 | O-ring | Seal |
| 052100100 | O-Ring | Seal |
| 052100140 | O-Ring | Seal |
| 052100150 | O-Ring | Seal |
| 052100400 | O-ring | Seal |
| 052109076 | O-ring | Seal |
| 052300550 | O-Ring | Seal |
| 052400280 | O-Ring | Seal |
| 052400400 | O-Ring | Seal |
| 052400550 | O-Ring | Seal |
| 120406080 | Valve Guide Seal | Seal |
| 131226180 | O-ring | Seal |
| 16-70001 | O-ring | Seal |
| 198636080 | Oil Seal | Seal |
| 198636090 | Oil Seal | Seal |
| 198636200 | Seal | Seal |
| 1BG60 | O-ring | Seal |
| 25-12028 | Seal, Lip Type | Seal |
| 25-12031 | O-Ring | Seal |
| 25-12032 | O-Ring | Seal |
| 25-12066 | Mechanical Seal | Seal |
| 25-18310 | Lip Seal | Seal |
| 185246011 | Oil pressure unit | Sensor |
| 22-40176 | Sender, Water Temperature - Single Station, YAZAKI guages | Sensor |
| 22-40177 | Sender, Oil Pressure - Single Station, YAZAKI guages | Sensor |
| 22-41016 | Oil Pressure Sender | Sensor |
| 22-42013 | High Exhaust Temperature Switch | Sensor |
| 22-42055 | Sender, Water Temperature - Single Station | Sensor |
| 22-71016 | Sender, Oil Pressure - Dual Station | Sensor |
| 22-71026 | Sender, Water Temperature - Dual Station | Sensor |
| 385720110 | Temperature Switch 95°C | Sensor |
| 145206062 | Thermostat | Thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.