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Your glow plug temperature range is TOO COLD when:
- The engine power is weak or has weakened from previous levels
- The engine slows down considerably or stops after removing the glow plug battery despite correct adjustment of the needle valve
Your glow plug temperature range is TOO HOT when:
- The engine suffers from pre ignition and a loss of power
- The overall engine running is rough
- The glow plug filament is broken or collapses frequently
Glow Plug RULES:
- If engine RPM immediately drops when the glow starter is removed, you may need a new glow plug, a hotter plug, or more nitro
- If the engine backfires alot, you may need a cooler plug or less nitro
GLOW PLUG SELECTION:
- HOT GLOW PLUGS (Low nitro and FAI fuels)
- Enya #3
- Fox: Miracle, Standard, and R/C Long (2 Volt)
- Fireball: Hot(1.2 - 3.0 Volt) and S-20 R/C Long
- Fire Power: F6 (Warm) and F7 (Hot)
- K&B: 1L
- McCoy: MC55 R/C Long, MC59, and MC14 (Very Hot)
- OS Engines: #0, #1, and #5
- Rossi: R1 (Extra Hot)
- Sonic Tronics: Glow Devil #300
- Thunderbolt: R/C Long
- MEDIUM GLOW PLUGS (10 - 15% nitro fuels)
- Enya #4 (Medium Hot) and #5 (Medium Cold)
- Fox: R/C Long (1.2 - 1.5 Volt) and Gold
- Fireball: Standard (1.2 - 2.0 Volt)
- Fire Power: F5 (Medium) and F6 (Warm)
- Hangar 9: Sport Long
- McCoy: MC50 and MC8
- OS Engines: #A3, #8, #9, #7 (with idle bar)
- Rossi: Medium and R3
- Sonic Tronics: Glow Devil Standard
- Tower Hobbies: Tower Power Performance plug and Regular (with idle bar)
- COLD GLOW PLUGS (25+ % nitro fuels)
- Enya #6 (Cold)
- Fox: R/C Long (1.2Volt) and #8
- Fireball: Cool (1.2 - 1.5 Volt)
- Fire Power: F2 (Extra Cold), F3 (Cold), and F4 (Cool)
- K&B: Long and Short High Performance Nitro Plug
- McCoy: MC9
- OS Engines: R5
- Rossi: R4 (Cold) and R5 (Extra Cold)
- FOUR-STROKE GLOW PLUGS (hots)
- Fox: Miracle Plug (Often used in 2 strokes with low nitro)
- McCoy: MC14 (Very hot, often used in inverted 4 strokes)
- OS Engines: Type F
- Sonic Tronics: Glow Devil ST 301 and 302
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