25/01/2026
Sobre as velas de ignição
12 Spark Plug Conditions (Easy to Understand)
1️⃣ Normal Condition
✅ Light tan / grey color
✔️ Correct air–fuel mixture & timing
2️⃣ Carbon Fouled
⚫ Dry black soot
❌ Rich mixture, clogged air filter, short trips
3️⃣ Oil Fouled
🛢️ Wet, oily deposits
❌ Worn piston rings, valve seals
4️⃣ Fuel / Wet Fouled
💧 Smells like fuel
❌ Weak ignition, flooding, misfire
5️⃣ Overheated
⚪ White blistered insulator
❌ Lean mixture, wrong heat range
6️⃣ Pre-Ignition
🔥 Melted or damaged electrode
❌ Hot spots, advanced timing
7️⃣ Detonation Damage
💥 Broken or chipped insulator
❌ Knocking, low-octane fuel
8️⃣ Ash Fouled
🟤 Light brown crust
❌ Oil additives, excessive oil burning
9️⃣ Glazed Plug
🟡 Shiny yellow surface
❌ Extended high-temperature driving
🔟 Mechanical Damage
🔧 Bent or smashed electrode
❌ Foreign object in cylinder
1️⃣1️⃣ Worn Electrodes
⚡ Rounded electrode edges
❌ Long service life, delayed replacement
1️⃣2️⃣ Cracked Insulator
⚠️ Hairline cracks
❌ Over-tightening, impact, overheating
