Husqvarna 336FR: faults, parts & manual

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Trimmers & brushcutters — Husqvarna

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Husqvarna

336FR

Petrol grass trimmer. Spare parts with Husqvarna’s own order codes, and the troubleshooting chapter of the operator’s manual.

Photograph: a grass trimmer. We hold no photograph of this exact machine, and we would rather say so than pass one off.
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What actually breaks

Open the problem that matches yours. Everything inside comes from the troubleshooting chapter of the operator’s manual Husqvarna publishes for this model — a 96-page document we read on 10 September 2026.

The engine starts but stops again 12 lines

Husqvarna sets this out as a table with the columns “Product part to examine”, “Possible cause”, “Action”. We print the lines in the maker’s order.

  • Fuel tank
  • Incorrect fuel type.
  • Drain the fuel tank and fill with correct fuel.
  • Carburetor
  • The idle speed is not correct.
  • Speak to your servicing dealer.
  • Air filter
  • Clogged air filter.
  • Clean or replace the air filter.
  • Fuel filter
  • Clogged fuel filter.
  • Replace the fuel filter.
The engine does not start 18 lines

Husqvarna sets this out as a table with the columns “Check”, “Possible cause”, “Procedure”. We print the lines in the maker’s order.

  • Stop switch.
  • The stop switch is in the stop position.
  • Set the stop switch to the start position.
  • Starter pawls.
  • The starter pawls cannot move freely.
  • Remove the starter cover and clean around the starter pawls.
  • Let an approved service agent help you.
  • Fuel tank.
  • Incorrect fuel type.
  • Drain the fuel tank and fill with correct fuel.
  • Spark plug.
  • The spark plug is dirty or wet.
  • Make sure that the spark plug is dry and clean.
  • The spark plug electrode gap is incorrect.
  • Clean the spark plug. Make sure that the electrode gap is correct. Make sure that the spark plug has a supressor.
  • Refer to technical data for correct electrode gap.
  • The spark plug is loose.
  • Tighten the spark plug.

Why we quote instead of rewriting. The manual is laid out as a table. Read by machine, a PDF loses the boundaries between columns, and pairing a symptom with the wrong remedy would give you a page that is confidently wrong rather than obviously broken. So we keep the maker’s order and words, and tell you how the table is built. The manual itself is linked further down.

Parts & prices

Every code below is Husqvarna’s own, read from the maker’s parts pages for this exact model. The code is printed on the part itself — on a label, moulded into the plastic or stamped in the metal. Read it off the broken part and type it here to find it straight away.

MUFFLER ASSY
505408601
🛒 Find this part
SPARK ARRESTER SCREEN
544116801
🛒 Find this part
SCREW CRPANM
724128759
🛒 Find this part
GASKET
537333101
🛒 Find this part
AIR CONDUCTOR
537340801
🛒 Find this part
SCREW IHSCFM
503202963
🛒 Find this part
SCREW IHSCFM
503200320
🛒 Find this part

We hold no photograph of the individual parts: Husqvarna does not publish them, and we would rather say so than show you the wrong picture. Prices are the maker’s United States list prices on the day we read them — an order of magnitude, not a quote. The buttons search shops in your own country, and those shops pay us a commission.

Where to buy

The search opens in your own country’s shop, in that shop’s language, with our tracking — the shop pays us a commission, you pay the same price.

TOOLS FOR THE JOB

Tools you’ll need

Chosen for this family, not a generic list. Prices and availability come from the shop in your country, with our tracking.

Specifications

Copied field for field from the manufacturer’s own product page on 10 September 2026, in the maker’s units. We do not convert them: a rounded conversion is how a torque figure quietly becomes wrong.

Cylinder displacement2.1 cu.inch
Output shaft power1.7 hp
Fuel tank volume0.6 l
Fuel Consumption435 g/kWh
Maximum power speed8,400 rpm
Idling speed2,900 rpm
Maximum rpm output shaft8,220 rpm
Electrode gap0.02 in
Clutch engagement speed (±120)3,800 rpm
Torque, max.1.8 Nm
Torque, max. at rpm6,600 rpm
Spark PlugChampion RCJ6Y
Cutting width18.5 in
Grass bladeMulti 300-3
HarnessBalance 35
Saw bladeScarlett 200-22
Trimmer headT35 M12
Handle typeBullhorn twistable
Tube diameter1.1 in
Weight (excl. cutting equipment)15.4 lbs
Tube length58.386 in
Lubricant type (Engine)Husqvarna 2 stroke or equiv. at 50:1
Lubricant type (bevel gear)Mineral grease
Exhaust emissions (CO₂ EU V)862 g/kWh
Exhaust emissions (HC average) EU40.51 g/kWh
Exhaust emissions (HC average) CARB29.31 g/kWh
Exhaust emissions (CO average) EU418.31 g/kWh
Exhaust emissions (CO average) EPA243.69 g/kWh
Exhaust emissions (NOx average) EU0.46 g/kWh
Exhaust emissions (NOx average) EPA1.09 g/kWh
Gear ratio1.4
Drive gear angle35 °
Equivalent vibration level (ahv, eq) left handle3.7 m/s²
Equivalent vibration level (ahv, eq) right handle2.7 m/s²
Sound pressure level at operators ear98 dB(A)
Sound power level, guaranteed (LWA)113 dB(A)
ConnectivityNot applicable

Manuals & documents

We link the maker’s documents instead of re-hosting them, so you always open the version Husqvarna is publishing today.

THE SAME BENCH

Other machines in this family

Machines in the same family for which we also have the maker’s codes, prices and troubleshooting chapter. The whole family →

Swipe for more →
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WHERE THIS COMES FROM, AND WHAT WE ARE MISSING

Our sources

What is missing, said plainly. We hold no photograph of this exact machine, no repair times and no failure statistics — nobody publishes those honestly. Prices are Husqvarna’s United States list prices and will differ in your country. We are not a dealer: we do not stock parts, and the buttons search shops that pay us a commission.

TroubleAtlas Technical Team · Compiled from manufacturer documents read on 10 September 2026 · Last checked 26 September 2026 · How we verify

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