Chainsaw

Stihl MS 201

2-Stroke

The Stihl MS 201 is a 35.2cc 2-stroke professional chainsaw built for utility arborists and tree crews who need a light production saw. It accepts 12" to 16" guide bars and weighs notably less than other saws in its displacement class, reducing fatigue during long shifts. The MS 201 uses a Zama carburetor and shares ignition and recoil parts with the MS 250 family. Under professional production cycles, annual carburetor cleaning or rebuild is standard practice alongside routine fuel filter and primer bulb replacement.

See a wrong fitment? Report a correction.

Verify before ordering: Fitment can vary by serial number, production date, region, and sub-model. Match the OEM number and physical dimensions before ordering.

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: 0000 400 7000, 1145 140 4402, 0000 350 3518, 1145 120 0605, 1145 080 2100, 1145 400 1300, 0000 350 6202, 1145 358 7700
Model Family: MS 201
Last Reviewed: 2026-05-20
Data Confidence: Aftermarket-confirmed
Sources Consulted: OEM part references, Aftermarket catalog cross-references, Retailer fitment listings

Quick Fitment

Part Type	OEM / Spec	Common Option	Confidence
Spark Plug	0000 400 7000	NGK BPMR7A	Medium · 2026-05-20
Air Filter	1145 140 4402	Stens 605-767	Medium · 2026-05-20
Fuel Filter	0000 350 3518	OEM 0000 350 3518	Low · 2026-05-20
Carburetor	1145 120 0605	Zama C1Q-S222	Medium · 2026-05-20
Primer Bulb	0000 350 6202	Zama BG-00-4	Medium · 2026-05-20
Recoil Starter	1145 080 2100	OEM 1145 080 2100	Low · 2026-05-20
Ignition Coil	1145 400 1300	OEM 1145 400 1300	Low · 2026-05-20
Fuel Line Kit	1145 358 7700	OEM 1145 358 7700	Low · 2026-05-20

Tune-Up Kit

Common service bundle: spark plug, air filter, fuel filter, carburetor, primer bulb, fuel line kit.

Maintenance Interval

Inspect filters and fuel lines each season, replace spark plugs during annual service, and service carb/fuel-system parts when starting or idle symptoms appear.

Before You Buy

Confirm the full model is Stihl MS 201, not just the family name.
Check serial number, production date, and regional variant before ordering.
Match the old OEM number stamped on the removed part when available.
Compare dimensions, plug gap, thread, fuel line diameter, or chain pitch/gauge where applicable.

Common Mistakes

Ordering from a family listing without checking the exact sub-model.
Buying a kit that includes the headline part but wrong gaskets, lines, or bulb size.
Choosing the wrong carburetor revision when multiple versions were used.
Assuming all fuel line kits use the same diameter and routing.
Installing the correct plug number with the wrong gap.
Matching bar length but missing pitch, gauge, or drive-link count.

Symptoms Map

Won't start

Spark plug, fuel filter, primer bulb, carburetor

Starts then dies

Fuel filter, fuel line kit, carburetor

Bogs under throttle

Air filter, carburetor, spark plug gap

Primer will not fill

Primer bulb, fuel line routing, in-tank filter

Cuts slowly

Chain pitch/gauge, bar wear, drive links

Replacement Options

Best OEM equivalent

Start with OEM references 0000 400 7000, 1145 140 4402, 0000 350 3518, 1145 120 0605 and match the removed part before choosing a listing.

Common aftermarket option

Cross-check aftermarket listings such as NGK BPMR7A (spark plug), Stens 605-767 (air filter), Zama C1Q-S222 (carburetor) against the OEM number and dimensions.

Best for annual tune-up

Bundle spark plug, air filter, fuel filter when servicing the Stihl MS 201 at the start of the season.

Best if replacing fuel system

Compare the fuel filter, carburetor, primer bulb, fuel line kit together so line routing, bulb size, filter style, and carburetor connections match.

Best chain/bar combo

Match chain specs together, especially pitch, gauge, drive links, and bar mount details.

Best budget kit

Use kit listings only when every included part matches this model page; cheap kits often mix correct headline parts with wrong bulbs, lines, or gaskets.

FAQ

Does this fit other Stihl models? Use this page for the exact Stihl MS 201 unless a manual, dealer listing, or removed part confirms another model.

Should I buy OEM or aftermarket parts for the Stihl MS 201? Use OEM when the part controls fuel metering, ignition, or safety. Aftermarket kits can be useful for routine filters, bulbs, plugs, and tune-up bundles when the OEM number and dimensions match.

How do I avoid ordering the wrong carburetor for the MS 201? Match the carburetor number stamped on the removed unit, then compare linkage, choke setup, primer routing, gasket stack, and fuel-inlet direction.

What should I check before replacing fuel-system parts? Photograph the old fuel-line routing, match line diameter and filter style, and compare primer bulb size before buying a kit.

What chain details matter besides bar length? Match pitch, gauge, and drive-link count against the bar stamp, old chain, and drive sprocket. Bar length alone is not enough.

Spark Plug

OEM0000 400 7000Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Dimensions: 0.5mm gap

Brand	Part #
NGK	BPMR7A	Best for annual tune-upAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.
Champion	RCJ6Y	Best for annual tune-upAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Air Filter

OEM1145 140 4402Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: HD2 heavy-duty filter; fits MS 201 and MS 201 T

Brand	Part #
Stens	605-767	Best for annual tune-upAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Fuel Filter

OEM0000 350 3518Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Orange in-tank pickup body fuel filter

Brand	Part #
No aftermarket listing is published for this part yet. Use the OEM reference and verify with a dealer or service manual before ordering.

Carburetor

OEM1145 120 0605Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Zama C1Q-S222; also fits MS 201 T

Brand	Part #
Zama	C1Q-S222	Best if replacing fuel systemAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Recoil Starter

OEM1145 080 2100Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20

Brand	Part #
No aftermarket listing is published for this part yet. Use the OEM reference and verify with a dealer or service manual before ordering.

Ignition Coil

OEM1145 400 1300Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20

Brand	Part #
No aftermarket listing is published for this part yet. Use the OEM reference and verify with a dealer or service manual before ordering.

Primer Bulb

OEM0000 350 6202Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20

Brand	Part #
Zama	BG-00-4	Best if replacing fuel systemAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Fuel Line Kit

OEM1145 358 7700Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Includes fuel pickup line and return line

Brand	Part #
No aftermarket listing is published for this part yet. Use the OEM reference and verify with a dealer or service manual before ordering.

Chain

OEMSpec-based fitmentConfidence: Low · Source: Inferred

Reviewed: 2026-05-20
Dimensions: 14", 3/8" PM3 picco pitch, .043" gauge, 52 drive links
Variant notes: Stock bar length; verify drive link count matches your bar

Brand	Part #
Oregon	91PX052G	Best chain/bar comboAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Guide Bar