Husqvarna 120i: faults, parts & manual

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Chainsaws — Husqvarna

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Husqvarna

120i

Battery chainsaw. Spare parts with Husqvarna’s own order codes, and the troubleshooting chapter of the operator’s manual.

No longer built — parts still listed Photograph: a chainsaw. 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 84-page document we read on 10 September 2026.

Fault messages shown on the display 36 lines

Husqvarna sets this out as a table with the columns “LED display”, “Possible faults”, “Possible action”. We print the lines in the maker’s order.

  • Warning indicator flashing.
  • Chain brake engaged.
  • Pull back the front hand guard to release the chain brake.
  • Temperature deviation.
  • Allow the product to cool down.
  • Overload. Cutting attachment jammed.
  • The cutting attachment is jammed.
  • Release the cutting attachment.
  • The power trigger and the activate button are pressed at the same time.
  • Release the power trigger and the product is active.
  • Green activate LED flashing.
  • Low battery voltage.
  • Charge the battery.
  • Warning indicator lit.
  • Service.
  • Turn to your servicing dealer.
  • Table 2: Battery
  • Troubleshooting the battery and/or the battery charger during charging.
  • Warning indicator flashing.
  • The battery is discharged.
  • Charge the battery.
  • Temperature deviation.
  • Use the battery in surroundings where tempereatures are between
  • -10 °C/14°F and 40°C/104°F.
  • Over voltage.
  • Check that the mains voltage corresponds with that stated on the rating plate on the product.
  • Remove the battery from the battery charger.
  • Warning indicator lit.
  • Cell difference is too much (1V).
  • Turn to your servicing dealer.
  • Table 3: Battery charger
  • Warning indicator flashing.
  • Temperature deviation.
  • Use the battery in surroundings where temperatures are between 5°C/41°F and 40°C/104°F.
  • Warning indicator lit.
  • Turn to your servicing dealer.

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.

KNOB
591471101 $24.99
🛒 Find this part
CLUTCH COVER
585593201 $24.99
🛒 Find this part
CHAIN TENSIONER
578776501 $6.99
🛒 Find this part
SLEEVE
585594001 $2.99
🛒 Find this part
SHAFT
585593901 $7.99
🛒 Find this part
PLATE
585593701 $5.99
🛒 Find this part
PINION
585593501 $5.99
🛒 Find this part
COVER
585593401 $5.99
🛒 Find this part
SCREW
585819001 $2.99
🛒 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.

Chain speed at max power37.73 fts
Output shaft power1.4 hp
Battery voltage40 V
Battery chemistryLi-Ion
Weight (excl. battery and cutting equipment)6.5 lbs
Recommended bar length, min14 in
Recommended bar length, max14 in
Pitch3/8" mini
Chain typeH38
BatteryNot included
Bar length35 cm
Bar length (inch)14 in
Equivalent vibration level (ahv, eq) front handle2.64 m/s²
Equivalent vibration level (ahv, eq) rear handle2.76 m/s²
Sound pressure level at operators ear88 dB(A)
Sound power level, guaranteed (LWA)101 dB(A)

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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