How do I fit the W16EPR-U?

5 steps, listed on this page with the replacement video where the maker has one.

What happens if I don't change it?

A worn or fouled plug makes the engine hard to start and run unevenly.

Lawn mower spark plug

Denso W16EPR-U spark plug

W16EPR-U

Fits 4 models · replace every 12 months

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

GenuineGenuine Denso

$7.30

Sun City Motorcycles · 28 OctLowest genuine · Sun City Motorcycles · checked 28 Oct

CompatibleCompatible option

$5.59

Mower Merch · 28 OctMower Merch · checked 28 Oct

Check sellerCheck seller details

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

Lowest compatibleLowest compatible price · $5.59

Mower Merch. Compare with genuine below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.

Open Mower Merch · $5.59

Compare 2 sellers

AUD, before delivery. Each price shows when it was checked.

Compatible options

1 seller

Mower MerchCompatible · checked 28 OctCompatible · Lowest compatiblechecked 28 Oct$5.59OpenGo to seller

Genuine Denso

1 seller

Sun City MotorcyclesGenuine · checked 28 Oct · out of stock when checkedGenuine part · Lowest genuine · out of stock when checkedchecked 28 Oct$7.30OpenGo to seller

Open cheapest seller · $5.59

Opens Mower Merch in a new tab. Their page is the source of truth for price, delivery and returns.

How long it lasts

Usually every 12 months (every year or 200 hours of use, whichever comes first, Honda's Buffalo owner's manual says; check and re-gap it every 6 months or 100 hours).

After replacing: No reset needed.

Not due yet?

Get a nudge when your spark plug is due — it's every 12 months. One email two weeks before, no newsletter. Manage or stop it anytime.

How to change the W16EPR-U spark plug

Watch the guide or follow the steps.

Honda HRN216 Lawn Mower Maintenance · Honda (official)

1Let the engine cool, pull the cap off the spark plug and clean the dirt from around it so nothing falls into the engine.
2Remove the plug with a spark plug wrench.
3Check the gap on the new plug: Honda gives 0.7-0.8 mm. Correct it if needed by carefully bending the side electrode.
4Screw the plug in by hand until it seats, so it does not cross-thread.
5Tighten a new plug a further 1/2 turn with the wrench to compress the washer (a used plug 1/8-1/4 turn), then refit the cap. Too loose and it overheats; too tight and it damages the cylinder head thread.

Every number this part goes byDenso W16EPR-U · W16EPR-U · W16EPRU

Retail name:: Denso W16EPR-U
Retail name:: W16EPR-U
Retail name:: W16EPRU

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 4 Honda modelsHRU196K, HRU196M, HRU216K, HRU216M

Honda4 models

Honda's manual also allows the Denso W16EPR-U for the GXV160 engine.

Common questionsWhat does the W16EPR-U fit? · How often should I replace the W16EPR-U? · Where can I buy the W16EPR-U in Australia?

What does the W16EPR-U fit?: The Denso W16EPR-U spark plug fits 4 Honda models, including the HRU196K, HRU196M and HRU216K. Every one is listed on this page.
How often should I replace the W16EPR-U?: Every 12 months, or sooner if it looks worn.
Where can I buy the W16EPR-U in Australia?: We track 2 Australian sellers for the W16EPR-U; the lowest listed price when we last checked was A$5.59 at Mower Merch. Prices are re-checked daily and dated on this page.
How do I fit the W16EPR-U?: 5 steps, listed on this page with the replacement video where the maker has one.
What happens if I don't change it?: A worn or fouled plug makes the engine hard to start and run unevenly.
Is there anything to reset afterwards?: No reset needed.

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