Chainsaw

Husqvarna 240

2-Stroke

The Husqvarna 240 is a 38.2cc 2-stroke chainsaw aimed at casual homeowner use for light firewood, limbing, and storm cleanup with 14" to 16" guide bars. The X-Torq engine reduces fuel consumption and emissions. The 240 runs a Zama carburetor and uses NGK BPMR7A or Champion RCJ6Y spark plugs shared across most Husqvarna consumer saws. The inertia-activated chain brake and combined choke/stop control are standard safety features. Routine service items are the air filter, spark plug, fuel filter, and primer bulb.

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, 545061801, 530095646, 586936202, 545008025, 575803501, 503936601, 544128601
Model Family: 235, 236, 240
Last Reviewed: 2026-05-20
Data Confidence: Aftermarket-confirmed
Sources Consulted: OEM part references, Aftermarket catalog cross-references, Retailer fitment listings

ℹ See also: 235, 236 — parts are often interchangeable within this family.

Quick Fitment

Part Type	OEM / Spec	Common Option	Confidence
Spark Plug	503235111	NGK BPM7A	Medium · 2026-05-20
Air Filter	545061801	Stens 605-522	Medium · 2026-05-20
Fuel Filter	530095646	Stens 610-035	Medium · 2026-05-20
Carburetor	586936202	Zama C1T-W33	Medium · 2026-05-20
Primer Bulb	503936601	Zama BG-00-4	Medium · 2026-05-20
Recoil Starter	545008025	OEM 545008025	Low · 2026-05-20
Ignition Coil	575803501	OEM 575803501	Low · 2026-05-20
Fuel Line Kit	544128601	Stens 115-627	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 240, 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, 545061801, 530095646, 586936202 and match the removed part before choosing a listing.

Common aftermarket option

Cross-check aftermarket listings such as NGK BPM7A (spark plug), Stens 605-522 (air filter), Stens 610-035 (fuel filter) against the OEM number and dimensions.

Best for annual tune-up

Bundle spark plug, air filter, fuel filter when servicing the Husqvarna 240 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 235 or 236? Parts may interchange with 235, 236, but verify the serial range, OEM number, and physical part details before ordering.

Should I buy OEM or aftermarket parts for the Husqvarna 240? 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 240? 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 BPM7A equivalent; fits 235, 236, 240

Brand	Part #
NGK	BPM7A	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

OEM545061801Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Fits 235, 236, 240 and E-series variants

Brand	Part #
Stens	605-522	Best for annual tune-upAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Fuel Filter

OEM530095646Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: In-tank pickup filter; fits 124, 235, 240

Brand	Part #
Stens	610-035	Best if replacing fuel systemAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Carburetor

OEM586936202Confidence: Medium · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Zama C1T-W33; replaces 545072601 and 574719402; fits 235, 236, 240

Brand	Part #
Zama	C1T-W33	Best if replacing fuel systemAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Recoil Starter

OEM545008025Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Pull rewind starter; fits 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.

Ignition Coil

OEM575803501Confidence: Low · Source: Aftermarket catalog

Reviewed: 2026-05-20
Variant notes: Also listed as 530039143

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: 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

OEM544128601Confidence: Medium · Source: Aftermarket catalog

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

Brand	Part #
Stens	115-627	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: Stock bar length; verify drive link count matches your bar

Brand	Part #
Oregon	91VXL056G	Best chain/bar comboAmazonAffiliate link Some links may be affiliate links. Match the OEM number, dimensions, and model variant before buying.

Guide Bar