The STIHL HT 133 takes the STIHL Service Kit 31 for FS 131, HT 133 and KM 131 (4180 007 4103) as its service kit; Australian sellers list it from A$50.00 as of 3 November 2026. Fitment confirmed against the manufacturer's compatibility list.
Your chainsaw
STIHL HT 133
Chainsaw
Confirmed against STIHL's listConfirmed against STIHL's own compatibility list
Not yours? Change
Takes the 4180 007 4103 service kit
Service Kit 31 for FS 131, HT 133 and KM 131 (4180 007 4103) · check the code on your old part before ordering.
STIHL lists Service Kit 31 (air filter, spark plug and fuel filter in one box) for the HT 133, FS 131, KM 131 and BT 131.
Your chainsaw
Chainsaw
Confirmed against STIHL's listConfirmed against STIHL's own compatibility list
Takes the 4180 007 4103
Service kit · check the code on your old part.
STIHL lists Service Kit 31 (air filter, spark plug and fuel filter in one box) for the HT 133, FS 131, KM 131 and BT 131.
Other STIHL models that take the 4180 007 4103
GenuineGenuine STIHL
$50.00
Premier Outdoor Power Equipment · 3 NovLowest genuine · Premier Outdoor Power Equipment · checked 3 Nov
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by STIHL. Compatible: another brand.Genuine is made by STIHL. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest price · $50.00
Premier Outdoor Power Equipment. Every seller we track is listed below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
This chainsaw also takes a spark plug
- NGK CMR6H spark plugOpen Power Mowers$8.80
STIHL names NGK CMR 6 H for the HT 132 and HT 133; gap 0.5 mm, replace after every 100 operating hours. Separate from the service kit.
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AUD, before delivery. Each price shows when it was checked.
Opens Premier Outdoor Power Equipment in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it when engine power drops noticeably and the filter is dirty or damaged, STIHL says (its paper filters last more than a year on average); fit the new spark plug after about 100 hours of use.
After replacing: No reset needed.
How to change the service kit in your STIHL HT 133
Watch the guide or follow the steps.
- 1Stop the engine and let it cool. Turn the choke knob to the closed position so no dirt gets into the intake.
- 2Loosen the filter cover screws, take off the cover and clean loose dirt from around the filter.
- 3Take out the paper air filter and fit the new one from the kit, then refit the cover.
- 4Take off the spark plug cover, pull off the boot, unscrew the plug and screw in the new one (gap 0.5 mm, STIHL says). Press the boot firmly home.
- 5Swap the fuel filter using the hook in the kit box.
Every number this part goes by
- Retail name:
- 4180 007 4103
- Retail name:
- 4180-007-4103
- Retail name:
- 41800074103
- Retail name:
- Service Kit 31
- Retail name:
- STIHL Service Kit 31
Sellers list any of these; they are the same part.
About your STIHL HT 133
STIHL chainsaw — Pole pruners. Its service kit is the Service Kit 31 for FS 131, HT 133 and KM 131 (4180 007 4103), part 4180 007 4103.
Also in this chainsaw: NGK CMR6H spark plug. STIHL names NGK CMR 6 H for the HT 132 and HT 133; gap 0.5 mm, replace after every 100 operating hours.
Where the model number is: The model is on the rating plate on the saw's housing (STIHL MS 170, Husqvarna 135 Mark II, Ryobi OCS1830BL). The chain's code is stamped on the drive links or printed on its box, and the bar length is on the bar.
Fits these 3 STIHL models
FS 131. STIHL lists Service Kit 31 (air filter, spark plug and fuel filter in one box) for the FS 131, HT 133, KM 131 and BT 131.
HT 133. STIHL lists Service Kit 31 (air filter, spark plug and fuel filter in one box) for the HT 133, FS 131, KM 131 and BT 131.
HT 135. STIHL lists Service Kit 31 for the HT 133 (and FS 131, KM 131); only an Australian dealer (Betontools) also names the HT 135, so check the filter in your pole pruner.
Common questions
- Which service kit fits the STIHL HT 133?
- The STIHL HT 133 takes the STIHL Service Kit 31 for FS 131, HT 133 and KM 131 (4180 007 4103). STIHL lists Service Kit 31 (air filter, spark plug and fuel filter in one box) for the HT 133, FS 131, KM 131 and BT 131.
- Where can I buy the 4180 007 4103 in Australia?
- We track 1 Australian seller for the 4180 007 4103; the lowest listed price when we last checked was A$50.00 at Premier Outdoor Power Equipment. Prices are re-checked daily and dated on this page.
- How do I fit the 4180 007 4103 in a STIHL HT 133?
- 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A clogged air filter starves the engine of air and a worn plug makes it hard to start; the kit replaces both with the fuel filter.
- Is there anything to reset afterwards?
- No reset needed.
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