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

Masport Quick Cut 460mm blade and bolt pack 780658 (2 blades)

780658

Fits 2 models

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GenuineGenuine Masport

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CompatibleCompatible option

$13.00

Mower Merch · 28 OctMower Merch · checked 28 Oct

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Genuine: made by Masport. Compatible: another brand.Genuine is made by Masport. Compatible is made by another brand. Check the seller's page for the size and models it fits.

Lowest compatibleLowest compatible price · $13.00

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Compatible options

1 seller

Mower MerchCompatible · checked 28 OctCompatible · Lowest compatiblechecked 28 Oct$13.00OpenGo to seller

Open cheapest seller · $13.00

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How long it lasts

Replace it when the blades or bolts are worn or damaged, in sets so the cutter stays balanced, Masport says; check them before each use and whenever the mower hits something or starts to vibrate.

After replacing: No reset needed.

How to change the 780658 blade

Watch the guide or follow the steps.

Masport Lawnmowers: Blade Systems · Masport (official)

1Stop the engine and wait for the blade to stop, then remove the spark plug lead and keep it away from the plug. Wear protective gloves.
2Drain the fuel, then tilt the mower with the spark plug uppermost, as the engine book says.
3Undo the blade centre bolt and take the blade carrier (disc) off the mower, noting where each part goes.
4Undo the tip mounting bolts and fit the new blades with the new bolts, washers and nuts from the set. Replace all the blades on the carrier together.
5Refit the carrier so its slots sit over the lugs and the drive plate; replace the mounting bolts if they are worn. Tighten the tip bolts to 20-25 Nm and the centre bolt to 45-50 Nm.

Every number this part goes by780658

Retail name:: 780658

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 Masport modelsLawn Marshal ST S18, Lawn Marshal ST S18 M&C

Masport2 models

Takes 2 Quick Cut blades on its blade carrier: one pack of 780658 (2 blades with bolts) does the job.

Common questionsWhat does the 780658 fit? · Where can I buy the 780658 in Australia? · How do I fit the 780658?

What does the 780658 fit?: The Masport Quick Cut 460mm blade and bolt pack 780658 (2 blades) fits the Masport Lawn Marshal ST S18 and Lawn Marshal ST S18 M&C.
Where can I buy the 780658 in Australia?: We track 1 Australian seller for the 780658; the lowest listed price when we last checked was A$13.00 at Mower Merch. Prices are re-checked daily and dated on this page.
How do I fit the 780658?: 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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