Service parts for the M643
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Prime power | 5 kW |
| Oil capacity | 2.84 L |
| Voltage options | 120 V, 240 V |
| Phase | 1 |
| Rated current | 20.8 A |
| Power factor | 1 |
| Dry weight | 157 kg |
Maintenance & consumables
for the Northern Lights L643| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air filter | 24-28300 | Amazon eBay | ||
| Fuel filter | Fuel | FF5114 | Amazon $28.98 eBay $14.95 FridayParts $34.80 | ||
| Oil filter | Oil filter | 24-08001 | Amazon eBay $27.44 |
Common questions
What engine is in the Northern Lights M643?
The Northern Lights M643 is powered by the Northern Lights L643 engine.
What kind of fuel does the Northern Lights M643 run on?
The Northern Lights M643 runs on diesel.
Which oil filter part number does the Northern Lights M643 take?
The Northern Lights M643 uses oil filter part number 24-08001.
What fuel filter fits the Northern Lights M643?
The Northern Lights M643 uses fuel filter part number FF5114.
What air filter fits the Northern Lights M643?
The Northern Lights M643 uses air filter part number 24-28300.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Battery Will Not Charge | Loose or corroded connections, Sulfated or worn out batteries, Loose or defective alternator belt | Clean and tighten battery connections, Check specific gravity of each battery, Check electrolyte level of each battery, Adjust belt tension, Replace belt |
| Engine Hard to Start or Will Not Start | Loose or corroded connections, Sulfated or worn out batteries, Loose or defective alternator belt | Clean and tighten loose battery and harness plug connection, Check specific gravity of each battery, Check electrolyte level of each battery, Adjust belt tension, Replace belt |
| Starter Inoperative | Check DC circuit breaker, Loose or corroded connections | If the breaker is tripped, reset it, Clean and tighten loose battery and harness plug connection |
| Starter Cranks Slowly | Low battery output, Crankcase oil too heavy | Battery is too small, Battery cables are too small, Check specific gravity of each battery, Check electrolyte level of each battery, Fill with oil of appropriate viscosity, Clean and tighten all battery connections |
| Entire Electrical System Does Not Function | Check DC circuit breaker, Faulty connection, Sulfated or worn out batteries, Improper starting procedure | If breaker is tripped, reset it, Clean and tighten battery and harness plug connections, Check specific gravity and electrolyte level of each battery, See starting section of this manual, Take special note of Bypass Switch operation |
| No fuel | Check level of fuel in fuel tank |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Northern Lights M643 troubleshooting guide (16 entries) →
Parts
6| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 22-48011 | Fuse for main circuit | Fuse | Amazon eBay | |
| 22-68312 | Fuse for main circuit | Fuse | Amazon eBay | |
| 24-08001 | Oil Filter | 1 | Oil filter | Amazon eBay $27.44 |
| 24-28300 | Air filter | Air filter | Amazon eBay | |
| 24-52020 | Secondary fuel filter (spin-on) | 1 | Fuel filter | Amazon $29.87 eBay $24.71 |
| FF5114 | Fuel | 1 | Fuel filter | Amazon $28.98 eBay $14.95 FridayParts $34.80 |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| 100% | 1.93 | 0.51 |