Stihl NGK CMR6H spark plug OEM replacement part on white background

Stihl

Stihl NGK CMR6H Spark Plug – OEM Replacement Part for Stihl | Genuine OEM

  • Sale
  • $6.99
  • 1 available
Stihl Logo
NGK CMR6H — OEM Spark Plug for Stihl Equipment

Stihl NGK CMR6H — OEM Replacement Spark Plug

Also known as: NGK CMR6H, Resistor Spark Plug, Small Engine Spark Plug

🚚 Orders Before 2PM Ship Same Day!
GENUINE OEM  ·  SAME-DAY SHIP  ·  EXPERT SUPPORT

Specifications

Specification Detail
Part Number CMR6H
Brand NGK (OEM for Stihl)
Plug Type Resistor Spark Plug
Thread Size 10mm
Reach 3/8 in. (9.5mm)
Heat Range 6
Gap Pre-gapped (0.020 in. / 0.5mm)
Terminal Type Solid Post
Quantity 1 Spark Plug
Fitment Stihl Chainsaws, Trimmers, Blowers, Cut-Off Saws

The NGK CMR6H is a 10mm resistor spark plug used as the original equipment ignition component across a wide range of Stihl handheld power equipment. Commonly referred to as a small engine spark plug or resistor plug, the CMR6H is designed specifically for two-stroke engines found in Stihl chainsaws, string trimmers, blowers, and cut-off saws. It delivers a consistent spark to ensure reliable engine starts, smooth idle, and peak fuel combustion in demanding outdoor working conditions. This plug is a direct OEM-spec replacement, pre-gapped and ready to install.

Key Features▼

NGK CMR6H Resistor Spark Plug Specs

The CMR6H features a 10mm thread, 3/8 in. reach, heat range 6, and comes pre-gapped at 0.020 in. (0.5mm). The built-in resistor suppresses radio frequency interference, protecting electronic ignition modules common on modern Stihl equipment.

Stihl Two-Stroke Engine Application

Engineered for high-RPM two-stroke engines, the NGK CMR6H delivers a reliable spark under the thermal and mechanical stress of professional chainsaw, trimmer, and blower use. It supports consistent combustion across the full operating range of Stihl handheld tools.

OEM Cross-Reference: Stihl CMR6H Plug

The NGK CMR6H is the OEM-specified spark plug for numerous Stihl models and is cross-referenced under Stihl part number 1110 400 7005. It is a direct drop-in replacement requiring no modification, ensuring factory-level ignition performance straight out of the box.

Fitment: Stihl Chainsaws, Trimmers and Blowers

The CMR6H is compatible with a broad range of Stihl handheld equipment including popular chainsaw series, string trimmers, backpack blowers, and cut-off saws. Always verify your model number against your operator's manual to confirm the correct spark plug specification before installation.

Compatible Equipment▼

The NGK CMR6H spark plug is the OEM-specified ignition component for a wide range of Stihl handheld two-stroke equipment. The CMR6H fits popular Stihl models including the MS 170, MS 180, MS 210, MS 230, MS 250, FS 45, FS 55, FS 80, FS 85, BG 55, BG 65, BG 85, SH 55, SH 85, HS 45, HS 75, HS 80, HS 85, BR 320, BR 400, and TS 400 — making it one of the most widely used Stihl replacement spark plugs available.

  • Stihl MS 170 / MS 180 Chainsaw
  • Stihl MS 210 / MS 230 / MS 250 Chainsaw
  • Stihl FS 45 / FS 55 String Trimmer
  • Stihl FS 80 / FS 85 String Trimmer
  • Stihl BG 55 / BG 65 / BG 85 Blower
  • Stihl SH 55 / SH 85 Shredder Vac
  • Stihl HS 45 / HS 75 / HS 80 / HS 85 Hedge Trimmer
  • Stihl BR 320 / BR 400 Backpack Blower
  • Stihl TS 400 Cut-Off Saw
Common Questions▼

Q: What is the spark plug gap for the NGK CMR6H on Stihl equipment?

A: The NGK CMR6H comes pre-gapped from the factory at 0.020 in. (0.5mm), which is the OEM-specified gap for most Stihl two-stroke engines. Always confirm the correct gap in your Stihl operator's manual before installation, as some models may specify a slightly different setting.

Q: What is the Stihl part number cross-reference for the NGK CMR6H spark plug?

A: The NGK CMR6H cross-references to Stihl OEM part number 1110 400 7005. This part number is used across a large range of Stihl chainsaws, trimmers, blowers, and cut-off saws, making the CMR6H one of the most common OEM spark plug replacements in the Stihl lineup.

Q: How often should I replace the spark plug on my Stihl MS 250 or MS 230 chainsaw?

A: Stihl recommends inspecting the spark plug — including the CMR6H — every 25 hours of operation and replacing it every season or every 100 hours of use, whichever comes first. A worn or fouled spark plug can cause hard starting, rough idle, and reduced power on your Stihl MS 230 or MS 250.

Q: Is the NGK CMR6H the correct spark plug for the Stihl FS 55 trimmer?

A: Yes, the NGK CMR6H is the OEM-specified spark plug for the Stihl FS 55 string trimmer. It is a direct replacement that installs without modification and restores factory ignition performance. Always verify your model's parts manual or consult the operator's guide to confirm compatibility before ordering.

Genuine OEM Quality  ·  Same-Day Shipping  ·  Expert Support

Order the NGK CMR6H with confidence — the correct OEM spark plug for your Stihl equipment, shipped fast.

Back to General Products