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Chainsaw

Stihl MS 170

2-Stroke · Also known as: 017

The Stihl MS 170 is a 30.1cc 2-stroke chainsaw and the entry point to Stihl's consumer chainsaw range, designed for light homeowner tasks such as limbing, storm cleanup, and occasional small firewood. It accepts 12" to 14" guide bars. The MS 170 runs a Zama C1Q-series carburetor and is mechanically related to the MS 180, sharing several common maintenance parts. Routine maintenance items are the air filter, fuel lines, and primer bulb. Ethanol-blend fuels cause accelerated diaphragm wear; draining fuel before storage prevents the most common no-start condition.

What this page covers

This page covers the Stihl MS 170 2-Stroke chainsaw.

Recorded annual maintenance parts: Spark Plug, Air Filter, Fuel Filter, Primer Bulb, Fuel Line Kit.

Reviewed spark-plug result: NGK BPMR7A or Champion RCJ6Y; 0.5mm plug gap.

Evidence: explicit provenance is recorded (Aftermarket-confirmed; reviewed 2026-05-20).

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Newer units may use 0000 350 6202 instead.

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

Annual Maintenance Parts

These are individual maintenance components already present in this model record. No combined product claim is made.

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Ignition

Air intake

Air Filter

OEM number
1130 124 0800
Specification / dimensions
Not recorded
Evidence status
Medium confidence · Aftermarket catalog · reviewed 2026-05-20
Variant / exclusion warning
Fits 017, 018, MS 170, and MS 180 family listings; verify cover style.

Fuel delivery

Fuel Filter

OEM number
0000 350 3500
Specification / dimensions
Not recorded
Evidence status
Low confidence · Aftermarket catalog · reviewed 2026-05-20
Variant / exclusion warning
OEM reference only in current data; match pickup body style.

Named part number: Not recorded

Search Amazon for Stihl 0000 350 3500

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Fuel Line Kit

OEM number
1130 358 7701
Specification / dimensions
Not recorded
Evidence status
Medium confidence · Aftermarket catalog · reviewed 2026-05-20
Variant / exclusion warning
Compare routing and grommet shape before cutting replacement line.

Stihl MS 170 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
0000 400 7000, 1130 124 0800, 0000 350 3500, 1130 120 0603, 1130 080 2103, 1130 400 1302, 4238 350 6201, 1130 358 7701
Model Family
MS 170, MS 180
Last Reviewed
2026-05-20
Data Confidence
Aftermarket-confirmed
Sources Consulted
  • Stihl MS 170 parts references
  • Aftermarket catalog cross-references
  • Retailer fitment listings
ℹ See also: MS 180 — verify each model and part independently; family membership does not establish fitment.

Quick Fitment

  • Spark PlugOEM / Spec: 0000 400 7000NGK BPMR7AMedium confidence · Aftermarket catalog · reviewed 2026-05-20View on Amazon →Affiliate link
  • Air FilterOEM / Spec: 1130 124 0800Stens 605-325Medium confidence · Aftermarket catalog · reviewed 2026-05-20Search Amazon →Affiliate link
  • Fuel FilterOEM / Spec: 0000 350 3500OEM 0000 350 3500Low confidence · Aftermarket catalog · reviewed 2026-05-20Search Amazon →Affiliate link
  • CarburetorOEM / Spec: 1130 120 0603Zama C1Q-S257Medium confidence · Aftermarket catalog · reviewed 2026-05-20Search Amazon →Affiliate link
  • Primer BulbOEM / Spec: 4238 350 6201Zama BG-00-4Low confidence · Aftermarket catalog · reviewed 2026-05-20Search Amazon →Affiliate link
  • Recoil StarterOEM / Spec: 1130 080 2103Stens 150-220Medium confidence · Aftermarket catalog · reviewed 2026-05-20Search Amazon →Affiliate link
  • Ignition CoilOEM / Spec: 1130 400 1302Stens 610-875Medium confidence · Aftermarket catalog · reviewed 2026-05-20Search Amazon →Affiliate link
  • Fuel Line KitOEM / Spec: 1130 358 7701Stens 115-128Medium confidence · Aftermarket catalog · reviewed 2026-05-20Search Amazon →Affiliate link

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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 170, 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, 1130 124 0800, 0000 350 3500, 1130 120 0603 and match the removed part before choosing a listing.

Named part options

Cross-check named parts such as NGK BPMR7A (spark plug), Stens 605-325 (air filter), Zama C1Q-S257 (carburetor) against the OEM number, identity label, and dimensions.

Best chain/bar combo

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

FAQ

Does this fit MS 180? MS 180 are listed in the same model family. That relationship does not establish interchangeable parts; verify each OEM number, serial range, and physical detail separately.

How do I avoid ordering the wrong carburetor for the MS 170? Match the carburetor number stamped on the removed unit, then compare linkage, choke setup, primer routing, gasket stack, and fuel-inlet direction.

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.

Related Repair Guides

Stihl MS170 Tune-Up Parts: What Actually FitsA tune-up overview for the Stihl MS170 chainsaw covering spark plug, air filter, fuel filter, carburetor, bar, and chain lookup steps.Stihl MS170 Won't Start After SittingA storage-related no-start checklist for Stihl MS170 chainsaws covering stale fuel, spark plug condition, fuel pickup, primer parts, and carburetor checks.Champion RCJ6Y Cross Reference: NGK BPMR7A Equivalent & GapNGK's catalog cross-references Champion RCJ6Y to NGK BPMR7A (stock no. 4626). Compare thread, reach, and resistor specs, and see the gap for Stihl and Husqvarna equipment.NGK BPMR7A vs BPMR8Y: Heat Range and Electrode DifferencesNGK BPMR7A and BPMR8Y share a 14 mm thread and 9.5 mm reach. BPMR8Y is one step colder with a V-grooved projected electrode. See which equipment uses each.

As an Amazon Associate, WhichPartFits earns from qualifying purchases. Match the OEM number, dimensions, and model variant before buying.

Spark Plug

OEM0000 400 7000Medium confidence · Aftermarket catalog · reviewed 2026-05-20
Reviewed
2026-05-20
Dimensions
0.5mm plug gap

Air Filter

OEM1130 124 0800Medium confidence · Aftermarket catalog · reviewed 2026-05-20
Reviewed
2026-05-20
Variant notes
Fits 017, 018, MS 170, and MS 180 family listings; verify cover style.

Fuel Filter

OEM0000 350 3500Low confidence · Aftermarket catalog · reviewed 2026-05-20
Reviewed
2026-05-20
Variant notes
OEM reference only in current data; match pickup body style.
  • No named part listing is published for this part yet. Use the OEM reference and verify with a dealer or service manual before ordering.

Carburetor

OEM1130 120 0603Medium confidence · Aftermarket catalog · reviewed 2026-05-20
Reviewed
2026-05-20
Variant notes
Match the carburetor number on the removed unit before replacing.
Exclusions
Do not use for other MS 170 variants unless carb number and linkage match.

Recoil Starter

OEM1130 080 2103Medium confidence · Aftermarket catalog · reviewed 2026-05-20
Reviewed
2026-05-20
Variant notes
Verify starter housing style and pawl engagement.

Ignition Coil

OEM1130 400 1302Medium confidence · Aftermarket catalog · reviewed 2026-05-20
Reviewed
2026-05-20
Variant notes
Verify coil mounting and flywheel compatibility.

Primer Bulb

OEM4238 350 6201Low confidence · Aftermarket catalog · reviewed 2026-05-20
Reviewed
2026-05-20
Variant notes
Serial split noted in current data; compare old bulb and serial number.
Exclusions
Newer units may use 0000 350 6202 instead.

Fuel Line Kit

OEM1130 358 7701Medium confidence · Aftermarket catalog · reviewed 2026-05-20
Reviewed
2026-05-20
Variant notes
Compare routing and grommet shape before cutting replacement line.

Chain

OEMSpec-based fitmentLow confidence · Inferred · reviewed 2026-05-20
Reviewed
2026-05-20
Dimensions
16 inch, 3/8 inch LP pitch, .043 inch gauge, 55 drive links
Variant notes
Verify bar stamp and drive-link count before ordering.

Guide Bar

OEMSpec-based fitmentLow confidence · Inferred · reviewed 2026-05-20
Reviewed
2026-05-20
Dimensions
16 inch, 3/8 inch LP pitch, .043 inch gauge
Variant notes
Confirm mount pattern, chain pitch, gauge, and drive-link count.