The Ryobi OLM1833S takes the RYOBI 33cm lawn mower blade RLMB4 as its blade. Fitment confirmed against the manufacturer's compatibility list.
Your lawn mower
Ryobi OLM1833S
Lawn mower
Confirmed against Ryobi's listConfirmed against Ryobi's own compatibility list
Not yours? Change
Takes the RLMB4 blade
RYOBI 33cm lawn mower blade RLMB4 · check the code on your old part before ordering.
Ryobi's manual calls the blade RAC431 (682072); it is now sold as RLMB4. Tighten the blade bolt to 13.5-20.5 Nm.
Your lawn mower
Lawn mower
Confirmed against Ryobi's listConfirmed against Ryobi's own compatibility list
Takes the RLMB4
Blade · check the code on your old part.
Ryobi's manual calls the blade RAC431 (682072); it is now sold as RLMB4. Tighten the blade bolt to 13.5-20.5 Nm.
Other Ryobi lawn mowers that take the RLMB4
GenuineGenuine Ryobi
See seller
Ryobi Australia · 28 OctRyobi Australia · checked 28 Oct
CompatibleCompatible option
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No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Ryobi. Compatible: another brand.Genuine is made by Ryobi. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Compare 2 sellers
AUD, before delivery. Each price shows when it was checked.
How long it lasts
Replace it when it is bent, worn or damaged, Ryobi says; inspect it before each use, and sharpen or replace a dull blade.
After replacing: No reset needed.
How to change the blade in your Ryobi OLM1833S
Watch the guide or follow the steps.
- 1Take out the battery pack and remove the safety key. Wear heavy-duty gloves: the blade is sharp.
- 2Remove the grass catcher, tilt the mower on its side and clear grass and debris from the deck.
- 3Hold the blade with a piece of wood and undo the blade bolt (13 mm on the OLM1833S) or blade nut (R18XLMW50); remove the old blade.
- 4Fit the new blade the same way round with its washer and bolt or nut.
- 5Tighten it with the wood holding the blade: 13.5-20.5 Nm on the OLM1833S, 35.8-40.8 Nm on the R18XLMW50.
Every number this part goes by
- Retail name:
- 682072002
- Retail name:
- RAC431
- Retail name:
- RLMB4
Sellers list any of these; they are the same part.
About your Ryobi OLM1833S
Ryobi lawn mower — 18V ONE+ 33cm. Its blade is the RYOBI 33cm lawn mower blade RLMB4, part RLMB4.
Where the model number is: The model is on the label on the mower's deck or handle. Disconnect the spark plug lead, or take the battery or safety key out, before you tip the mower: the blade is sharp.
Fits these 2 Ryobi models
Common questions
- Which blade fits the Ryobi OLM1833S?
- The Ryobi OLM1833S takes the RYOBI 33cm lawn mower blade RLMB4. Ryobi's manual calls the blade RAC431 (682072); it is now sold as RLMB4. Tighten the blade bolt to 13.5-20.5 Nm.
- Where can I buy the RLMB4 in Australia?
- We link to 2 Australian sellers for the RLMB4; the seller's page shows the current price.
- How do I fit the RLMB4 in a Ryobi OLM1833S?
- 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A blunt blade tears the grass tips, which then brown, and a bent blade makes the mower vibrate and wears the engine or motor.
- Is there anything to reset afterwards?
- No reset needed.
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