A poorly functioning engine in a Stihl chainsaw can mean more work for the operator and can even be dangerous. Consequently, Stihl recommends replacing the spark plug after every 100 service hours.
How do I know if my chainsaw spark plug is bad?
What Does a Bad Spark Plug Look Like and What Makes It Look That Way?
- Black, chunky carbon buildup spanning the gap between the sparking end of the plug and the hook-shaped metal piece overhanging the end.
- Dark carbon residue built up on the ends but not spanning the gap.
What is the lifespan of a spark plug?
Most spark plugs have a factory service interval of 100,000 miles, though some may be as much as 120,000 miles. Long-life platinum and iridium spark plugs will typically last up to 100,000 miles or longer provided the engine isn’t using oil or doesn’t spend a lot of time idling.
How often do spark plugs go bad?
Most vehicles sold in the United States require that their spark plugs are replaced every 30,000 to 50,000 miles.
What color should a chainsaw spark plug be?
In general, a light tan/gray color tells you that the spark plug is operating at optimum temperature and that the engine is in good condition. Dark coloring and wet or dry deposits on the electrode can indicate an overly-rich condition, excessive amounts of oil, or too large of a plug gap.
What does a failing spark plug sound like?
That sound is caused by your spark plugs not detonating properly and igniting all the fuel. The fuel and vapor that did not ignite eventually will catch fire and detonate. When that happens, you hear a knocking sound from your engine. Bad spark plugs are common causes of engine knock, but simple to fix.
How do you know when spark plugs need changing?
What symptoms may indicate my vehicle’s spark plugs need replacing?
- Rattling, pinging or “knock”-like noises. When spark plugs begin to misfire, you may notice unusual noises from the force of the pistons and combustion not working properly. …
- Hard vehicle start. …
- Reduced performance. …
- Poor fuel economy.
What happens if you don’t change your spark plugs?
Spark plugs will depreciate over time, so various engine issues will arise if they are not replaced. When the spark plugs do not generate the adequate spark, the combustion of the air/fuel mixture becomes incomplete, leading to loss of engine power, and in the worst-case scenario, the engine will not run.
Can AutoZone Check spark plugs?
A gapping gauge tool is available from AutoZone. A small amount of anti-seize maybe used on most but not all spark plug brands and types. Check the box or the plug manufacture. Install each new spark plug, being careful not to cross-thread and damage the spark plug and cylinder head threads.
Can spark plugs last 200 000 miles?
If maintained well, they can last 100,000 miles. But by the 200K mark, you could be overdue for a third set of plugs. Cost to replace: $100 to $300.
Do you have to replace all spark plugs at once?
Q: Should You Replace All Spark Plugs At Once? A: Yes, as a general rule, it’s better to replace all plugs at the same time to ensure consistent levels of performance.
Do spark plugs go bad after sitting?
Spark plugs shouldnt be a problem. They can sit for years and not go “bad”. If you can pull the plugs, they may give you an indication (check the color, etc) about whats going wrong in your engine and why your MPG is so bad.
Can I drive my car with a bad spark plug?
Continuing to drive with worn out or damaged spark plugs can ultimately cause engine damage, so don’t put it off.
What should a spark plug look like after use?
- The first step is removing the spark plug you want to look at. …
- A normal spark plug will have brown or grayish-tan deposits on the side electrode. …
- Black, dry soot on the electrodes and insulator tip indicates a carbon-fouled plug. …
- Black, oily deposits on the electrodes and insulator tip points to an oil-fouled plug.
What causes spark plugs to go bad fast?
Overheating Damage: Overheating spark plugs can cause the electrode to wear faster. Pre-ignition from an improperly timed engine can cause this, as can an incorrect air to fuel ratio. Oil Contamination: If oil seeps onto the spark plug, it will foul the tip.
What does a lean spark plug look like?
Spark plugs are generally a brown or grey color, which is caused by normal ignition. However, your spark plugs will become either too clean (evidenced by a lack of normal color) or white when your engine is running significantly lean.