The STIHL MS 251 takes the STIHL 23 RM Pro saw chain 3693 000 0068 (68 drive links, 45 cm bar) as its chain; Australian sellers list it from A$49.00 as of 28 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your chainsaw
STIHL MS 251
Chainsaw
Confirmed against STIHL's listConfirmed against STIHL's own compatibility list
Not yours? Change
Takes the 3693 000 0068 chain
23 RM Pro saw chain 3693 000 0068 (68 drive links, 45 cm bar) · check the code on your old part before ordering.
STIHL Australia sells the MS 251 with a 45 cm Light 04 bar and .325" RM Pro chain: 68 drive links. With a 40 cm .325" bar it takes 62. The C-BE (quick chain tensioner, seven-tooth sprocket) needs one extra drive link on 35 and 40 cm bars.
Your chainsaw
Chainsaw
Confirmed against STIHL's listConfirmed against STIHL's own compatibility list
Takes the 3693 000 0068
Chain · check the code on your old part.
STIHL Australia sells the MS 251 with a 45 cm Light 04 bar and .325" RM Pro chain: 68 drive links. With a 40 cm .325" bar it takes 62. The C-BE (quick chain tensioner, seven-tooth sprocket) needs one extra drive link on 35 and 40 cm bars.
Other STIHL chainsaws and their chains and parts
The 3693 000 0068 fits the MS 251 only. These STIHL models take a different chain:
GenuineGenuine STIHL
$49.00
STIHL Australia · 28 OctLowest genuine · STIHL Australia · checked 28 Oct
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 · $49.00
STIHL Australia. 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 approves NGK CMR6H or Bosch USR 4AC (no Australian price found for the Bosch plug); gap 0.5 mm, replace after about 100 hours. Separate from the chain.
Compare 3 sellers
Compare 1 seller
AUD, before delivery. Each price shows when it was checked.
Opens STIHL Australia in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it once any cutter's service marks are no longer visible, STIHL says; check the chain before work and sharpen it when it is blunt.
After replacing: No reset needed. Check the chain tension often while a new chain beds in.
How to change the chain in your STIHL MS 251
Watch the guide or follow the steps.
- 1Stop the engine and engage the chain brake. On a battery saw, take the battery out; on an electric saw, unplug it. Put on sturdy work gloves: the cutters are sharp.
- 2Undo the nut and take off the chain sprocket cover. On models with the quick chain tensioner (C-B, C-BE), open the wing-nut handle and undo the wing nut instead.
- 3Slacken the chain (turn the tensioning screw anticlockwise, or the tensioning gear clockwise on quick-tensioner models), then lift off the guide bar and the old chain.
- 4Fit the new chain in the bar groove so the arrows on the tie straps on top of the bar point in the direction of rotation, and seat the drive links on the chain sprocket.
- 5Put the bar back on with the tensioner peg in the hole in the bar, then turn the tensioning screw clockwise (the tensioning gear anticlockwise on quick-tensioner models) until the chain fits snugly against the bar and the drive links sit in the groove.
- 6Refit the chain sprocket cover flush with the saw and tighten the nut firmly (close the wing-nut handle on quick-tensioner models). STIHL says the chain expands and contracts as you cut, so check the tension regularly.
Every number this part goes by
- Retail name:
- 23 RM Pro 68
- Retail name:
- 23RMPro 68
- Retail name:
- 3693 000 0068
- Retail name:
- 3693-000-0068
- Retail name:
- 36930000068
Sellers list any of these; they are the same part.
About your STIHL MS 251
STIHL chainsaw — Petrol chainsaws (farm). Its chain is the 23 RM Pro saw chain 3693 000 0068 (68 drive links, 45 cm bar), part 3693 000 0068.
Other chains the maker lists for this chainsaw: STIHL 23 RM Pro saw chain 3693 000 0062 (62 drive links, 40 cm bar). With a 40 cm (16") bar: 62 drive links.
Also in this chainsaw: NGK CMR6H spark plug. STIHL approves NGK CMR6H or Bosch USR 4AC (no Australian price found for the Bosch plug); gap 0.5 mm, replace after about 100 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 this STIHL model
STIHL1 model
STIHL Australia sells the MS 251 with a 45 cm Light 04 bar and .325" RM Pro chain: 68 drive links. With a 40 cm .325" bar it takes 62. The C-BE (quick chain tensioner, seven-tooth sprocket) needs one extra drive link on 35 and 40 cm bars.
Common questions
- Which chain fits the STIHL MS 251?
- The STIHL MS 251 takes the STIHL 23 RM Pro saw chain 3693 000 0068 (68 drive links, 45 cm bar). STIHL Australia sells the MS 251 with a 45 cm Light 04 bar and .325" RM Pro chain: 68 drive links. With a 40 cm .325" bar it takes 62. The C-BE (quick chain tensioner, seven-tooth sprocket) needs one extra drive link on 35 and 40 cm bars.
- Where can I buy the 3693 000 0068 in Australia?
- We track 1 Australian seller for the 3693 000 0068; the lowest listed price when we last checked was A$49.00 at STIHL Australia. Prices are re-checked daily and dated on this page.
- How do I fit the 3693 000 0068 in a STIHL MS 251?
- 6 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A blunt or stretched chain cuts slowly, throws dust instead of chips, and makes the saw harder to control.
- Is there anything to reset afterwards?
- No reset needed. Check the chain tension often while a new chain beds in.
Something looks wrong with the MS 251 match? . Reports go to a person, not a bot.