FitMatch

Chainsaw spark plug

NGK BPMR7A spark plug

BPMR7A

Fits 19 models

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

Genuine

$5.60

Power Mowers · 3 Nov

Compatible

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No compatible seller tracked yet

Genuine: made by NGK. Compatible: another brand.

Lowest price · $5.60

Power Mowers. Every seller we track is listed below. Some links earn us a commission.

Open Power Mowers

Compare 3 sellers

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

Power MowersGenuine · checked 3 Nov$5.60Open
Mower MerchGenuine · checked 28 Oct$8.00Open
Amazon AUGenuine · checked 28 Oct$8.95Open
Open cheapest seller · $5.60

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

How long it lasts

Replace it after about 100 hours of use, or sooner if the electrodes are badly worn, STIHL's manuals say.

After replacing: No reset needed.

How to change the BPMR7A spark plug

Watch the guide or follow the steps.

Changing the spark plug of the MS 261 | STIHL​ · STIHL (official)
  1. 1Stop the engine and let it cool. On a chainsaw, engage the chain brake.
  2. 2Take off the shroud or spark plug cover, then pull the boot off the plug.
  3. 3Clean any dirt from around the plug so nothing falls into the engine, then unscrew it with the combination spanner.
  4. 4Check the gap on the new plug: STIHL gives 0.5 mm. Adjust it by bending the side electrode carefully if needed.
  5. 5Screw the new plug in by hand until it seats, tighten it with the spanner, press the boot firmly back on and refit any cover you took off.
Every number this part goes by
Retail name:
BPMR 7 A
Retail name:
BPMR 7A
Retail name:
BPMR7A
Retail name:
NGK BPMR 7 A
Retail name:
NGK BPMR7A

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.

Fits these 19 STIHL models

FS 120. STIHL's FS 120/250 manual names Bosch WSR 6 F or NGK BPMR 7 A; gap 0.5 mm, replace after 100 operating hours.

FS 250. STIHL's FS 120/250 manual (2016) names NGK BPMR 7 A; gap 0.5 mm, replace after every 100 operating hours.

FS 450. STIHL's FS 300-480 manual names Bosch WSR 6 F, NGK BPMR 7 A or Champion RCJ 6 Y (not all markets); replace after 100 operating hours.

FS 55. STIHL's current FS 55 manual names NGK BPMR 7 A (earlier manuals also Bosch WSR 6 F); gap 0.5 mm, replace after about 100 hours.

FS 561 C-EM. STIHL approves NGK BPMR7A (from STIHL); gap 0.5 mm, replace every 100 hours of operation.

FS 85. STIHL's FS 80/85 manual names Bosch WSR 6 F or NGK BPMR 7 A; gap 0.5 mm, replace after 100 operating hours.

MS 661 C-M. STIHL approves NGK BPMR7A (from STIHL) or Bosch WSR 6 F; gap 0.5 mm, replace after every 100 hours of runtime.

MS 880. STIHL approves NGK BPMR 7 A or Bosch WSR 6 F; gap 0.5 mm, replace after 100 hours.

MS 362 C-M. STIHL's 2017 MS 362 C-M manual (0458-154-8321-A) names Bosch WSR 6 F or NGK BPMR 7 A instead: use the plug your saw's manual names.

FS 38, MS 180. STIHL approves NGK BPMR 7 A, Bosch WSR 6 F or STIHL ZK C 14; gap 0.5 mm, replace after about 100 hours.

MS 271, MS 291. STIHL approves NGK BPMR 7 A, Bosch WSR 6 F or STIHL ZK C14; gap 0.5 mm, replace after about 100 hours.

The other 6 models. STIHL approves NGK BPMR 7 A or Bosch WSR 6 F; gap 0.5 mm, replace after about 100 hours.

Common questions
What does the BPMR7A fit?
The NGK BPMR7A spark plug fits 19 STIHL models, including the FS 120, FS 250 and FS 38. Every one is listed on this page.
Where can I buy the BPMR7A in Australia?
We track 3 Australian sellers for the BPMR7A; the lowest listed price when we last checked was A$5.60 at Power Mowers. Prices are re-checked daily and dated on this page.
How do I fit the BPMR7A?
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 saw hard to start and run unevenly.
Is there anything to reset afterwards?
No reset needed.

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