Chainsaw

Husqvarna 135

2-Stroke

The Husqvarna 135 is a 40.9cc 2-stroke chainsaw designed for regular homeowner use — firewood cutting, light felling, and property maintenance with 14" to 16" guide bars. The X-Torq engine platform improves fuel efficiency over the previous generation. The 135 runs a Zama carburetor and accepts NGK BPMR7A or Champion RCJ6Y spark plugs. The air inertia chain brake, combined choke/stop control, and adjustable oil pump are standard features. Routine maintenance items are the spark plug, air filter, primer bulb, and fuel system components.

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: 503235111, 588229301, 591375401, 506450501, 591466702, 591466501, 503936601, 592854401, 596009756
Model Family: 120, 130, 135
Last Reviewed: 2026-05-20
Data Confidence: Aftermarket-confirmed
Sources Consulted: OEM part references, Aftermarket catalog cross-references, Retailer fitment listings

ℹ See also: 120, 130 — parts are often interchangeable within this family.

Quick Fitment

Part Type	OEM / Spec	Common Option	Confidence
Spark Plug	503235111	NGK BPMR7A	Medium · 2026-05-20
Air Filter	588229301	Stens 605-580	Medium · 2026-05-20
Fuel Filter	591375401	Stens 610-034	Medium · 2026-05-20
Carburetor	506450501	Zama C1T-EL41	Medium · 2026-05-20
Primer Bulb	503936601	OEM 503936601	Low · 2026-05-20
Recoil Starter	591466702	OEM 591466702	Low · 2026-05-20
Ignition Coil	591466501	OEM 591466501	Low · 2026-05-20
Fuel Line Kit	592854401	Stens 115-530	Medium · 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 Husqvarna 135, 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 503235111, 588229301, 591375401, 506450501 and match the removed part before choosing a listing.

Common aftermarket option

Cross-check aftermarket listings such as NGK BPMR7A (spark plug), Stens 605-580 (air filter), Stens 610-034 (fuel filter) against the OEM number and dimensions.

Best for annual tune-up

Bundle spark plug, air filter, fuel filter when servicing the Husqvarna 135 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 120 or 130? Parts may interchange with 120, 130, but verify the serial range, OEM number, and physical part details before ordering.

Should I buy OEM or aftermarket parts for the Husqvarna 135? 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 135? 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

OEM503235111Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Dimensions: 0.5mm gap
Variant notes: NGK BPMR7A; also fits 123, 130, 145, 240, 435, 440

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

OEM588229301Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Mesh air filter; 588229302 is non-woven alternative; also fits 130, 135 Mark II

Brand	Part #
Stens	605-580	Best for annual tune-upAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Fuel Filter

OEM591375401Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: In-tank pickup filter

Brand	Part #
Stens	610-034	Best if replacing fuel systemAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Carburetor

OEM506450501Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Zama C1T-EL41; also fits 135E, 140, 140E, 435, 440, 435E, 440E

Brand	Part #
Zama	C1T-EL41	Best if replacing fuel systemAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Recoil Starter

OEM591466702Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Service kit starter housing for 135 Mark II

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

OEM591466501Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Ignition module service kit; also fits 130, 135 Mark II

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

OEM503936601Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Air purge bubble; also fits 130, 135, 140, 235, 236, 240

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.

Fuel Line Kit

OEM592854401Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Service kit fuel hose assembly; also fits 130

Brand	Part #
Stens	115-530	Best if replacing fuel systemAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Chain

OEMSpec-based fitmentConfidence: Low · Source: Inferred

Reviewed: 2026-05-20
Dimensions: 16", 3/8" LP pitch, .050" gauge, 56 drive links
Variant notes: 135 Mark II ships with 16" bar; verify drive link count matches your bar

Brand	Part #
Oregon	91PX056G	Best chain/bar comboAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.
Oregon	S56	Best chain/bar comboAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Guide Bar

OEM596009756Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Dimensions: 16", 3/8" LP pitch, .050" gauge, 56 drive links
Variant notes: OEM Husqvarna HL-280-56 bar; superseded from 501959256

Brand	Part #
Oregon	160SDEA095	Best overallAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.