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.

Lawn mower blade

RYOBI 33cm lawn mower blade RLMB4

RLMB4

Fits 2 models

Wrong part, or your model missing? Tell us. A person checks every report.

GenuineGenuine Ryobi

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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.

Genuine Ryobi

2 sellers

Ryobi AustraliaGenuine · no price recordedGenuine part · Manufacturerno price recordedSee priceOpenGo to seller

BunningsGenuine · no price recordedGenuine partno price recordedSee priceOpenGo to seller

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 RLMB4 blade

Watch the guide or follow the steps.

How To: Replace a RYOBI Mower Blade · RYOBI TOOLS USA (official)

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 by682072002 · RAC431 · RLMB4

Retail name:: 682072002
Retail name:: RAC431
Retail name:: RLMB4

Sellers list any of these; they are the same part.

Will it fit your appliance?

Type your model number and we'll check it against the makers' lists.

Your appliance model

Fits these 2 Ryobi modelsOLM1833S, R18XLMW50

Ryobi2 models

OLM1833S. Ryobi's manual calls the blade RAC431 (682072); it is now sold as RLMB4. Tighten the blade bolt to 13.5-20.5 Nm.

R18XLMW50. Ryobi's part 682072002 is sold as RLMB4. Blade bolt torque 35.8-40.8 Nm.

Common questionsWhat does the RLMB4 fit? · Where can I buy the RLMB4 in Australia? · How do I fit the RLMB4?

What does the RLMB4 fit?: The RYOBI 33cm lawn mower blade RLMB4 fits the Ryobi OLM1833S and R18XLMW50.
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?: 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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