The Northern Lights 6125 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 |
|---|---|---|
| 24-26813 | "Air Sep" Filter Assembly | Air filter |
| 185046210 | Alternator Assembly | Alternator |
| 22-45018 | Alternator 24V/ 100 Amp Isolated Ground | Alternator |
| 22-71052 | Alternator (24V/35A ISO Ground) | Alternator |
| 6151-36-3050 | Bearing Assembly - Undersize, 1.00 mm | Bearing |
| 6151-37-3050 | Bearing Assembly - Undersize, 0.75 mm | Bearing |
| 6151-38-3050 | Bearing Assembly - Undersize, 0.50 mm | Bearing |
| 6151-39-3050 | Bearing Assembly - Undersize, 0.25 mm | Bearing |
| 40-44802 | Drive Belt Set | Belt |
| 01010-61650 | Bolt M16 x 50 mm | Bolt |
| 01010-61660 | Bolt M16 x 60 mm | Bolt |
| 01010-81050 | Bolt M10 x 50 mm | Bolt |
| 01050-31645 | Bolt M16 x 45 mm | Bolt |
| 01051-51635 | Bolt | Bolt |
| 01051-61640 | Bolt | Bolt |
| 01435-00816 | Bolt | Bolt |
| 6150-21-1710 | Bolt | Bolt |
| 6150-31-3310 | Bolt | Bolt |
| 6210-21-6471 | Bolt | Bolt |
| 6251-31-3130 | Bushing | Bushing |
| 6150-21-5420 | Cam Follower Cover Assembly | Cam follower cover |
| 6150-22-6430 | Cam Follower Cover (with breather outlet) | Cam follower cover |
| 6251-21-6500 | Cam Follower Cover (with oil fill) | Cam follower cover |
| 6150-21-5920 | Collar | Collar |
| 6251-31-3100 | Connecting Rod Assembly (includes keys #6 - #8) | Connecting rod assy |
| 6151-31-1110 | Crankshaft | Crankshaft |
| 6151-35-1010 | Crankshaft Assembly | Crankshaft assy |
| 6151-21-1100 | Cylinder Block Assembly (includes keys 1-48) | Cylinder block |
| 6151-31-8300 | Damper | Damper |
| 02400-10413 | Dowel Pin | Dowel pin |
| 04020-00514 | Dowel Pin | Dowel pin |
| 04020-00820 | Dowel Pin | Dowel pin |
| 04020-01228 | Dowel Pin | Dowel pin |
| 6150-21-4770 | Dowel Pin | Dowel pin |
| 6156-31-4610 | Dowel Pin | Dowel pin |
| 6251-31-1630 | Flywheel Assy SAE #14 (includes key #16) | Flywheel assy |
| 600-319-3550 | Element, Final Fuel Filter | Fuel filter |
| 600-319-4540 | Element, Primary Fuel Filter | Fuel filter |
| 6151-71-7100 | Fuel Filter Head Assembly | Fuel filter |
| 6217-71-7300 | Final Fuel Filter Head Assembly | Fuel filter |
| 07005-01012 | Gasket | Gasket |
| 07005-02216 | Gasket | Gasket |
| 0700501412 | Gasket | Gasket |
| 0700501612 | Gasket | Gasket |
| 09920-00150 | Liquid Gasket (not shown) | Gasket |
| 11-14804 | Gasket | Gasket |
| 11-14807 | Gasket | Gasket |
| 11-14808 | Gasket, Thermostat Housing | Gasket |
| 11-15001 | Gasket, Coolant Outlet to Heat Exchanger | Gasket |
| 11-19701 | Gasket, Heat Exchanger & Gear oil Cooler Outlet | Gasket |
| 11-24806 | Gasket, Air Intake (Standard) | Gasket |
| 11-31013 | Turbo Oil Return Gasket | Gasket |
| 11-31014 | Turbo Oil Inlet Gasket | Gasket |
| 11-31096 | Gasket | Gasket |
| 11-31097 | Gasket (6") | Gasket |
| 11-34804 | Gasket | Gasket |
| 11-34808 | Gasket | Gasket |
| 11-34809 | Gasket, Oil Return Adapter Mounting | Gasket |
| 6138-11-6810 | Gasket, Thermostat Seal | Gasket |
| 6150-11-8820 | Rubber Gasket | Gasket |
| 6150-13-4810 | Gasket | Gasket |
| 6150-21-5812 | Gasket | Gasket |
| 6150-22-6490 | Gasket | Gasket |
| 6150-61-1821 | Gasket | Gasket |
| 6150-61-2815 | Oil Cooler Gasket | Gasket |
| 6150-61-6910 | Gasket (can use 11-14806) | Gasket |
| 6151-15-5810 | Gasket | Gasket |
| 6151-61-1162 | Gasket | Gasket |
| 6221-81-6810 | Gasket | Gasket |
| 6251-11-1810 | Cylinder Head Gasket | Gasket |
| 6251-11-4260 | Gasket | Gasket |
| 6251-11-4820 | Gasket, Air Intake (Alternate) | Gasket |
| 6251-11-7220 | Gasket | Gasket |
| 6251-11-8810 | Gasket | Gasket |
| 6251-21-3231 | Gasket | Gasket |
| 6251-21-3250 | Gasket | Gasket |
| 6251-21-6450 | Gasket | Gasket |
| TB1207C | Liquid Gasket | Gasket |
| 6150-35-1120 | Gear | Gear |
| 18-14812 | Hose Assembly 1/4" I.D. x 11-1/2" | Hose |
| 18-14813 | Hose 1-5/8" ID X 2-1/4" 3 Ply Silicone | Hose |
| 18-14814 | Hose 2" ID X 2-1/2" 3 Ply Silicone | Hose |
| 18-20001 | Hose, 1-1/4" I.D., 90° Molded | Hose |
| 18-22002 | Hose 1-3/4" ID x 2-1/4" | Hose |
| 18-26002 | Hose, 2" I.D. x 3-3/4" 3 Ply Silicone | Hose |
| 18-26801 | Hump Hose 6" I.D. x 5" I.D. x 4" LOA | Hose |
| 18-54815 | Hose Assembly, 5/16" I.D. x 12" USCG A-1 SAE J1942 | Hose |
| 18-54816 | Hose Assembly, 5/16" I.D. x 10-1/4" USCG A-1 SAE J1942 | Hose |
| 18-72566 | Hose, 1/2" ID x 15" | Hose |
| 18-74806 | Hose Assembly 1/2" ID x 28" | Hose |
| 18-75001 | Hose, 2-7/8" I.D. x 3-1/2" 3 Ply Silicone | Hose |
| 41-00004 | Hose 3/4" ID x 18-1/2" | Hose |
| 41-01013 | Hose, 5/16" ID | Hose |
| 41-01020 | Hose 3/8" ID | Hose |
| 41-01059 | Hose, 1" I.D. Oil Resistant | Hose |
| 6251-61-1210 | Impeller | Impeller |
| 6150-31-1130 | Key | Key |
| 6150-21-8010 | Main Bearing - Standard | Main bearing |
| 6150-26-8010 | Main Bearing - Undersize, 1.00 mm | Main bearing |
| 6150-27-8010 | Main Bearing - Undersize, 0.75 mm | Main bearing |
| 6150-28-8010 | Main Bearing - Undersize, 0.50 mm | Main bearing |
| 6150-29-8010 | Main Bearing - Undersize, 0.25 mm | Main bearing |
| 6150-21-1210 | Main Bearing Cap | Main bearing cap |
| 6150-21-1250 | Main Bearing Cap | Main bearing cap |
| 6150-21-5930 | Nut | Nut |
| 600-211-1340 | Oil Filter Assembly | Oil filter |
| 040126210 | Bearing | Service part / kit |
| 06030-06004 | Ball Bearing | Service part / kit |
| 06030-06304 | Ball Bearing | Service part / kit |
| 10-14811 | Filler Neck Assembly | Service part / kit |
| 17-10002 | Expansion Plug Brass 1" | Service part / kit |
| 17-10054 | Expansion Plug Brass 1-1/4" | Service part / kit |
| 17-14802 | Expansion Plug Brass 2" | Service part / kit |
| 185446218 | Stator, complete | Service part / kit |
| 20-15000 | Element, Heat Exchanger | Service part / kit |
| 20-24801 | Element, Aftercooler | Service part / kit |
| 20-64800 | Gear Oil Cooler (includes keys 1, 15, & 16) | Service part / kit |
| 20-64802 | Element (not shown) | Service part / kit |
| 21-10001 | Drain Cock, Brass 1/8 NPT | Service part / kit |
| 21-10002 | Drain Cock 1/4 NPT | Service part / kit |
| 21-10007 | Filler Cap 7 PSI | Service part / kit |
| 21-10010 | Zinc Anode | Service part / kit |
| 21-20002 | One Way Valve, Brass 1/4 NPT x 3/8-37T | Service part / kit |
| 22-40537 | Circuit Breaker 30 Amp | Service part / kit |
| 22-41079 | Soleniod 24 VDC 85 Amp | Service part / kit |
| 27-14850 | Connector, Coolant Bypass | Service part / kit |
| 27-34831 | Dry Exhaust Elbow 5" | Service part / kit |
| 27-35021 | Dry Exhaust Elbow 6" | Service part / kit |
| 27-54808 | Tube Assembly | Service part / kit |
| 30-00002 | Piston Ring | Service part / kit |
| 30-00018 | Piston Ring | Service part / kit |
| 30-00025 | Repair Kit | Service part / kit |
| 30-04809 | Cartridge Assembly 3 | Service part / kit |
| 34-14804 | Bushing, Tapered Locking type | Service part / kit |
| 36-70006 | Ball Valve, Brass 1/2 NPT Female | Service part / kit |
| 36-71002 | Shut-off Valve 3/8 NPT x 1/2-45T | Service part / kit |
| 600-2111890 | Spring (not shown) | Service part / kit |
| 600-2111930 | Alarm | Service part / kit |
| 6140-61-6512 | Valve | Service part / kit |
| 6150-11-1320 | Exhaust Valve Seat, Standard | Service part / kit |
| 6150-12-1370 | Valve Guide | Service part / kit |
| 6150-12-8610 | Oil Fill Cap | Service part / kit |
| 6150-21-1490 | Camshaft Bushing | Service part / kit |
| 6150-21-5910 | Bushing | Service part / kit |
| 6150-21-6710 | Breather | Service part / kit |
| 6150-21-8000 | Main Bearing Set - Standard | Service part / kit |
| 6150-21-8050 | Thrust Bearing - Standard | Service part / kit |
| 6150-42-4110 | Intake Valve | Service part / kit |
| 6150-42-4210 | Exhaust Valve | Service part / kit |
| 6150-51-6210 | Oil Pickup, Forward Sump | Service part / kit |
| 6150-51-6612 | Oil Pick-Up, Rear Sump | Service part / kit |
| 6151-22-2220 | Cylinder Liner | Service part / kit |
| 6151-31-3050 | Connecting Rod Bearing - Standard | Service part / kit |
| 6151-62-1310 | Shaft | Service part / kit |
| 6151-62-2180 | Strainer | Service part / kit |
| 6152-62-2210 | Element | Service part / kit |
| 6162-13-1150 | Expansion Plug | Service part / kit |
| 6162-555230 | Valve (not shown) | Service part / kit |
| 6207-21-5340 | Dipstick | Service part / kit |
| 6251-11-1380 | Intake Valve Seat, Standard | Service part / kit |
| 6251-11-8840 | Ring | Service part / kit |
| 6251-31-2030 | Piston Ring Set | Service part / kit |
| 6251-31-2510 | Piston | Service part / kit |
| 6251-41-4450 | Valve Spring | Service part / kit |
| 6261-81-7110 | Fuel Cooler | Service part / kit |
| 6261-81-9250 | Clear Bowl Assembly | Service part / kit |
| P6125 | Parts Catalog | Service part / kit |
| 6150-41-2430 | Pin | Pin |
| 6150-41-2440 | Pin | Pin |
| 6154-21-1810 | Piston Cooling Nozzle | Piston cooling nozzle |
| 6151-31-2410 | Piston Pin | Piston pin |
| 07040-12414 | Plug | Plug |
| 07040-13016 | Plug | Plug |
| 07043-00617 | Plug | Plug |
| 07043-70108 | Plug | Plug |
| 07043-70211 | Plug | Plug |
| 07046-43016 | Plug | Plug |
| 07046-43516 | Plug | Plug |
| 07046-44016 | Plug | Plug |
| 6154-21-1981 | Plug | Plug |
| 6251-31-1590 | Pulley, Non-hardening | Pulley |
| 25-14801 | Raw Water Pump | Pump |
| 25-24801 | Centrifugal Pump, Cast Iron 1-1/2" NPT Inlet X 1-1/4" NPT Outlet (Aftercooler Supply) | Pump |
| 6251-51-1000 | Oil Pump Assembly (Parts not available separately) | Pump |
| 6251-61-1101 | Coolant Pump Assembly (former #6251-61-11000) | Pump |
| 6150-31-1351 | Ring Gear (148 teeth) | Ring gear |
| 02893-05037 | O-ring | Seal |
| 02896-11012 | O-ring | Seal |
| 07000-63042 | O-ring | Seal |
| 07000-72012 | O-Ring | Seal |
| 07000-72015 | O-Ring | Seal |
| 07000-72022 | O-ring | Seal |
| 07000-72045 | O-ring | Seal |
| 07000-72060 | O-ring | Seal |
| 07000-72085 | O-Ring | Seal |
| 07000-72115 | O-ring | Seal |
| 07000-73028 | O-ring | Seal |
| 07000-73035 | O-ring | Seal |
| 07000-73045 | O-ring | Seal |
| 07002-03634 | O-ring | Seal |
| 07002-12034 | O-ring | Seal |
| 07002-22434 | O-ring | Seal |
| 07002-23034 | O-ring | Seal |
| 07005-01412 | Sealing Washer M14 | Seal |
| 16-01000 | O-ring | Seal |
| 16-04801 | O-ring | Seal |
| 16-13101 | O-ring | Seal |
| 16-14802 | O-ring | Seal |
| 16-14804 | O-ring | Seal |
| 16-14806 | O-ring | Seal |
| 16-15006 | O-ring | Seal |
| 16-15008 | O-ring | Seal |
| 16-15705 | O-ring | Seal |
| 16-24802 | O-ring | Seal |
| 16-24803 | O-ring | Seal |
| 16-25002 | O-ring | Seal |
| 16-64801 | O-ring | Seal |
| 30-00006 | O-ring | Seal |
| 51M7042 | O-ring | Seal |
| 6150-11-1930 | Oil Grommet | Seal |
| 6150-11-1950 | Water Grommet | Seal |
| 6150-11-1960 | Oil Grommet | Seal |
| 6150-11-1970 | Oil Grommet | Seal |
| 6150-12-1960 | Water Grommet | Seal |
| 6150-21-2230 | Lower O-ring | Seal |
| 6150-21-2240 | Upper O-ring | Seal |
| 6150-21-2250 | Crevice Seal | Seal |
| 6150-21-3230 | Front Seal | Seal |
| 6150-21-6391 | Packing | Seal |
| 6150-41-4570 | Valve Stem Seal | Seal |
| 6150-51-1710 | Ring | Seal |
| 6150-51-1720 | Ring | Seal |
| 6150-61-1510 | Oil Seal | Seal |
| 6150-61-2151 | Seal | Seal |
| 6150-61-2510 | O-ring | Seal |
| 6150-61-2520 | O-ring | Seal |
| 6150-61-2550 | O-ring | Seal |
| 6151-21-4161 | Rear Seal | Seal |
| 6162-535430 | Packing | Seal |
| 6211-61-1532 | Water Seal | Seal |
| 6251-11-8830 | Seal | Seal |
| 6251-81-7210 | Grommet | Seal |
| 6261-81-2720 | O-ring | Seal |
| 6735-21-1930 | O-ring | Seal |
| 6261-81-2710 | Boost Pressure Sensor | Sensor |
| 6261-81-6900 | Temperature Sensor | Sensor |
| 6261-81-9260 | Water Sensor | Sensor |
| 6560-61-7300 | Sensor, Air Temperature | Sensor |
| 04065-04818 | Snap Ring | Snap ring |
| 04025-00408 | Spring Pin | Spring pin |
| 04025-00512 | Spring Pin | Spring pin |
| 22-45039 | Starting Motor, 12 Volt | Starter |
| 22-45078 | Starting Motor, 24 Volt | Starter |
| 600-421-6320 | Thermostat 1800F/ 820C | Thermostat |
| 6251-61-2610 | Thermostat | Thermostat |
| 6150-26-8050 | Thrust Bearing - Oversize, 1.00 mm | Thrust bearing |
| 6150-27-8050 | Thrust Bearing - Oversize, 0.75 mm | Thrust bearing |
| 6150-28-8050 | Thrust Bearing - Oversize, 0.50 mm | Thrust bearing |
| 6150-29-8050 | Thrust Bearing - Oversize, 0.25 mm | Thrust bearing |
| 30-34833 | Turbocharger (ID tag# 199383) | Turbocharger |
| 01643-31645 | Washer | Washer |
| 6150-31-1810 | Washer | Washer |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.