Chainsaw
Stihl MS 251
2-Stroke
The Stihl MS 251 is a 45.6cc 2-stroke chainsaw and the direct successor to the MS 250, updated with a more fuel-efficient engine, improved anti-vibration, and current emission standards. It accepts 16" to 18" guide bars and occupies the same homeowner/prosumer position. Unlike the MS 250, the MS 251 does not share a carburetor with the MS 210/230 family — it runs its own Zama variant. Routine maintenance items are the air filter, spark plug, fuel lines, and primer bulb. The MS 251 is the recommended current-production choice over the MS 250 generation.
Stihl MS 251 quick specs
- Equipment
- Chainsaw · 2-Stroke
- Covered Parts
- Spark Plug, Air Filter, Fuel Filter, Carburetor, Recoil Starter, Ignition Coil, Primer Bulb, Fuel Line Kit, Chain, Guide Bar
- OEM References
- 8
- Model Family
- MS 210, MS 230, MS 250, MS 251
Spark Plug
OEM0000 400 7000(0.5mm gap)
| Brand | Part # | |
|---|---|---|
| NGK | BPMR7A | Buy on Amazon → |
| Champion | RCJ6Y | Buy on Amazon → |
Air Filter
OEM1143 120 1300Fits MS 231, MS 251
| Brand | Part # |
|---|
Fuel Filter
OEM0000 350 3518In-tank pickup body fuel filter; updated version for MS 231, MS 251
| Brand | Part # |
|---|
Carburetor
OEM1143 120 0611Zama C1Q-S295D IntelliCarb compensating carburetor; fits MS 231, MS 251
| Brand | Part # | |
|---|---|---|
| Zama | C1Q-S295D | Buy on Amazon → |
Recoil Starter
OEM1143 080 2103Fits MS 231, MS 251
| Brand | Part # |
|---|
Ignition Coil
OEM1143 400 1310Fits MS 231, MS 251
| Brand | Part # |
|---|
Primer Bulb
OEM1143 350 6200Fits MS 231, MS 251
| Brand | Part # | |
|---|---|---|
| Zama | BG-00-4 | Buy on Amazon → |
Fuel Line Kit
OEM1143 358 7700Fuel hose for MS 231, MS 251
| Brand | Part # |
|---|
Chain
OEM(18", .325" pitch, .050" gauge, 68 drive links)Stock bar length; verify drive link count matches your bar
| Brand | Part # | |
|---|---|---|
| Oregon | 22LPX068G | Buy on Amazon → |
Guide Bar
OEM(18", .325" pitch, .050" gauge)
| Brand | Part # | |
|---|---|---|
| Oregon | 183PXLBA074 | Buy on Amazon → |