Tires & Parts

The Best RC Engine Glow Plugs & Spark Plugs

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Selecting the correct glow plug or spark plug is crucial for the optimal performance and longevity of your RC engine. The right ignition source ensures reliable starting, consistent power delivery, and efficient fuel combustion. Investing a little time in understanding your options will prevent potential engine damage and enhance your RC hobby experience.

No. 1
5Packs RC Glow Plug 70117#3 N3 Medium Hot Spark Nitro Engine Parts Replace OS 8 Compatible with Kyosho Redcat...
  • Compatible with: tmaxx 3.3 EB-4 thunder tiger stock SHOCKWAVE, TSUNAMI, VOLCANO STX, TORNADO S30, VOLCANO S30, AFTERSHOCK 21, HURRICANE XL, AFTERSHOCK 3.0, AFTERSHOCK 3.5, BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP, LANDSLIDE...
  • Platinum/Iridium Super Duty,Replacement of OS 8, HSP 70117 N3, 3232X, Redcat 70117H
  • Longer Lasting Element, For 1/8 1/10 Scale Vehicles with 4c Engines 5% - 40% Nitro Fuels
  • Package :5 × glow plug.
No. 2
3-Pack Hot Spark Glow Plug N4 No.4 70117 Compatible with Kyosho HSP HPI Redcat 1/8 1/10 RC Nitro Engines Car...
  • Item: Hot spark glow plug N4 No.4.
  • Material: Steel; Height: 17.2mm; Six Corner: 8mm
  • For 4c Engines 5% - 40% Nitro Fuels
  • Compatible with tmaxx 3.3 EB-4 thunder tiger stock SHOCKWAVE, TSUNAMI, VOLCANO STX, TORNADO S30, VOLCANO S30, AFTERSHOCK 21, HURRICANE XL, AFTERSHOCK 3.0, AFTERSHOCK 3.5, BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP, LANDSLIDE...
No. 3
Hobbypark 70117H Hot Glow Plug N3 No. #3 Spark Nitro Engine Parts Replace OS For Traxxas Losi HPI Redcat HSP...
  • Platinum/Iridium Super Glow plug Replace OS #8
  • Longer Lasting Element, For 4c Engines 5% - 40% Nitro Fuels
  • Improves Idle and transition
  • Compatible with: tmaxx 3.3 EB-4 thunder tiger stock SHOCKWAVE, TSUNAMI, VOLCANO STX, TORNADO S30, VOLCANO S30, AFTERSHOCK 21, HURRICANE XL, AFTERSHOCK 3.0, AFTERSHOCK 3.5, BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP, LANDSLIDE...
No. 4
2PCS ShareGoo Spark Glow Plug No.3 N3 Hot 70117 Compatible with Traxxas Kyosho HSP HPI Redcat 1/8 1/10 RC...
  • Please refer to your instruction manual and make sure it's compatible.
  • Compatible with SHOCKWAVE, TSUNAMI, VOLCANO STX, TORNADO S30, VOLCANO S30, AFTERSHOCK 21, HURRICANE XL, AFTERSHOCK 3.0, AFTERSHOCK 3.5, BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP, LANDSLIDE 21, LANDSLIDE LT, MAELSTROM LT...
  • longer Lasting Element, For 5% - 40% Nitro Fuels
  • Improves Idle and transition,HEX Size: 8mm
No. 5
3-Pack Hot Spark Glow Plug N3 No.3 70117 Compatible with Kyosho HSP HPI Redcat 1/8 1/10 RC Nitro Engines Car...
  • Item: Hot spark glow plug N3 No.3; Package quantity: 3pcs
  • Material: Steel; Height: 17.2mm; Six Corner: 8mm
  • For 4c Engines 5% - 40% Nitro Fuels.
  • Compatible with tmaxx 3.3 EB-4 thunder tiger stock SHOCKWAVE, TSUNAMI, VOLCANO STX, TORNADO S30, VOLCANO S30, AFTERSHOCK 21, HURRICANE XL, AFTERSHOCK 3.0, AFTERSHOCK 3.5, BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP, LANDSLIDE...
No. 6
6PCS Hobbypark 70117 Glow Plug #4 N4 Spark Medium Hot Nitro Engine Parts for Traxxas Redcat HPI HSP...
  • Platinum/Iridium Super Duty Glow plug,No. 4 Medium Hot, Replace OS 8
  • Longer Lasting Element, For Vehicles with 4c Engines 5% - 40% Nitro Fuels
  • Improves Idle and transition
  • Compatible with: tmaxx 3.3 EB-4 thunder tiger stock SHOCKWAVE, TSUNAMI, VOLCANO STX, TORNADO S30, VOLCANO S30, AFTERSHOCK 21, HURRICANE XL, AFTERSHOCK 3.0, AFTERSHOCK 3.5, BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP, LANDSLIDE...
No. 7
Shaluoman N3 Hot Spark Glow Plug for RC Nitro Engines Car Truck Buggy Pack of 5, Spark Plugs for Traxas T-maxx...
  • N3 Hot Spark Glow Plug for RC Nitro Car buggy truck: Platinum/Iridium Super Duty,Replacement of OS 8 / HSP 70117 N3 N4 / 3232X
  • Longer Lasting Element, For 1/8 1/10 Scale Truck Buggy Vehicles with 4c Engines 5% - 40% Nitro Fuels
  • Shaluoman nitro glow plug improves Idle and transition
  • Compatible with: tmaxx 3.3 EB-4 thunder tiger stock Redcat SHOCKWAVE, TSUNAMI, VOLCANO STX, TORNADO S30, VOLCANO S30, AFTERSHOCK 21, HURRICANE XL, AFTERSHOCK 3.0, AFTERSHOCK 3.5, BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP...
No. 8
3Pcs O.S. Spark Glow Plug NO.8 OS #8 Hot For Nitro Fuel Engine RC Car Airplane
  • COMPATIBILITY: Medium heat range glow plug suitable for most O.S. and other brands of 2-stroke R/C engines, designed for optimal performance
  • VERSATILE USE: Perfect for RC fixed-wing aircraft, helicopters, and select RC car models including 12/15CV, 15LD, 21RG, and 21RZ-V 01b engines
  • DESIGN FEATURES: Medium-length plug without idle bar, specifically engineered for reliable ignition in all 2-stroke engine applications
  • PACKAGE CONTENTS: Set includes 3 premium quality #8 glow plugs, each individually sealed in original retail packaging
No. 9
CrazyHobby 70117 Hot Glow Plug No.3 N3 Spark Nitro Engine Parts Replace OS 8 for Traxxas HPI HSP Kyosho...
  • Compatible with Traxxas T-Maxx 3.3, Tsunami, Volcano STX, Tornado S30, Volcano S30, Aftershock 21, Hurricane XL, Aftershock 3.0, Aftershock 3.5, Backdraft 3.5, Caldera 3.0, Earthquake 3.0, Earthquake 3.5, Hurricane XP, Landslide 21, Landslide LT...
  • Hot 70117 70117H Platinum/Iridium RC Glow Plugs N3 for 1/8 1/10 RC Nitro Engines Car Truck Buggy.
  • Longer lasting nitro rc glow plugs, For 4c Engines 5% - 40% Nitro Fuels
  • RC nitro glow plugs improves idle and transition.
No. 10
5Packs RC Glow Plug #4 N4 Medium Hot Spark Nitro Engine Parts 70117 Compatible with Traxxas Kyosho Redcat HPI...
  • Glow plugs nitro rc compatible with T-maxx 3.3, TSUNAMI, VOLCANO STX, TORNADO S30, VOLCANO S30, AFTERSHOCK 21, HURRICANE XL, AFTERSHOCK 3.0, AFTERSHOCK 3.5, BACKDRAFT 3.5, CALDERA 3.0, EARTHQUAKE 3.0, EARTHQUAKE 3.5, HURRICANE XP, LANDSLIDE 21, LANDSLIDE...
  • Difference between N3 and N4 Hot: N3 is a hot head, and N4 is a cold head; the start temperature of N3 is a littler higher than N4, so N3 is more suitable for Winter use, N4 is suitable for Summer.
  • Longer Lasting Element, For Vehicles with 4c Engines 5% - 40% Nitro Fuels
  • 5 PCS N4 Hot Glow plug: Hot 70117 Platinum/Iridium Super Spark Glow Plug for Traxas T-maxx Kyosho HSP1 HPI Redcat 1/8 1/10 RC Nitro Engines Car Truck Buggy

Last update on 2026-10-16 / Affiliate links / Images from Amazon Product Advertising API

How to Choose the Best RC Engine Glow Plugs & Spark Plugs

Understanding RC Ignition Types

RC engines primarily use either glow plugs or spark plugs. Glow plugs are common in smaller, 2-stroke engines fueled by methanol-based mixtures. They heat up via a battery during starting and remain hot from combustion. Spark plugs are typically found in larger, 4-stroke engines, often running on gasoline, and operate similarly to those in full-sized vehicles, requiring an ignition system to generate a spark.

Glow Plug Considerations

When choosing a glow plug, consider the engine's size, type, and fuel. Different plugs have varying heat ranges, affecting how quickly they heat up and cool down. A colder plug is suitable for high-performance engines that run hot, while a hotter plug is better for engines that struggle to maintain heat. Compatibility with your specific fuel mixture (e.g., nitro content) is also vital.

Spark Plug Selection

For spark plugs, the primary factors are thread size, reach, and heat range. Ensure the plug matches your engine's specifications for thread and reach to ensure proper fitment and sealing. The heat range determines how effectively the plug dissipates heat; consult your engine manufacturer's recommendations to avoid overheating or fouling.

Durability and Brand Reputation

RC ignition components are subject to extreme conditions. Look for plugs made from high-quality materials designed for durability and consistent performance. Established brands often have a reputation for reliability and may offer better support or warranty options. Reading reviews from other RC enthusiasts can provide insights into real-world performance and longevity.

Frequently Asked Questions

What is the difference between a glow plug and a spark plug in RC engines?
Glow plugs use a heating element that glows red hot, powered by a battery during starting and maintained by combustion heat. Spark plugs generate an electrical spark to ignite the fuel-air mixture, similar to full-size engines.
How do I know which heat range glow plug to buy?
The heat range depends on your engine's operating temperature and tuning. High-performance engines often require colder plugs, while standard engines may benefit from hotter plugs. Consult your engine manual for specific recommendations.
Can I use a different size spark plug than what came with my engine?
It is generally not recommended to use a spark plug with a different thread size or reach. This can lead to improper sealing, poor compression, or even damage to the cylinder head.
How often should I replace my RC engine's glow plug or spark plug?
Replacement frequency varies based on usage, engine type, and fuel. Many RC users replace glow plugs every 10-20 gallons of fuel, while spark plugs might last longer. Inspect them regularly for signs of wear or fouling.
What are the signs of a failing glow plug or spark plug?
Symptoms of a failing plug include difficulty starting, inconsistent idling, loss of power, or misfires. Visually inspecting the plug for damage, carbon buildup, or corrosion can also indicate a problem.

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1 Specifications: we compare the key features and specifications listed by the manufacturer and on Amazon.
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4 Updates: comparisons are refreshed regularly as prices and availability change.

Our comparisons are reviewed and updated regularly to reflect the latest products and prices.

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