The higher number is a slightly hotter spark type plug. The RC14YC4 is now the standard plug for the 990/992 Generac engines. The 999 in the new 16-22kW Evolution (7000 series) units and older 20kW units are still using the cooler RC12YC4 plugs. The ‘4’ at the end is the spark gap that’s preset at the Champion factory.
What spark plug is the same as RC12YC?
NGK CS6 Series Spark Plug Replaces Champion RC12YC.
What does Champion RC12YC fit?
RC12YC Spark Plugs
|Center Electrode||Copper Core|
|Fits||BRIGGS & STRATTON GAS ENGINES — Intek, Vanguard single cylinder OHV KOHLER GAS ENGINES — Command OHV, K series, 16.0/TH16, 18.0/TH18|
What do Champion spark plug numbers mean?
The combination of letters and numbers assigned for every Champion spark plug is a logical formula which indicates the major features of its design. …  Heat Range – The middle number indicates the heat range of the spark plug, the higher the number the hotter the heat range.
Are all lawn mower spark plugs the same?
Yes there are different plugs for different engines. Usually you need the engine model on your mower, and take in the old spark plug to the hardware store. … Usually near the spark plugs at the store there is a booklet showing your old model of spark plug and what model the brand in front of you is compatible with.
How can you tell when a spark plug is bad?
What signs are there that your spark plugs are failing?
- Your car is a rough starter. …
- Your car is a rough idler. …
- Your engine will sometimes misfire. …
- Your engine surges. …
- Your fuel consumption is higher than usual. …
- Your car isn’t accelerating as it should.
What can I use to clean my spark plugs?
To safely clean a spark plug, you should use a wire brush or spray-on plug cleaner specifically designed for this ignition part. You can also use a sturdy knife to scrape off tough deposits. Note: NEVER clean a spark plug with a shot blaster or abrasives.
Is Champion QC12YC the same as RC12YC?
Super Moderator. From what I can find the two plugs have the same heat range so are interchangeable without any difference in mechanical engine performance. BUT if you have a fuel injected engine you should use the QC plug. It’s internal electrical construction is different to work properly with fuel injection systems.
Does RC12YC replace RC12YX?
1 of 1 found this helpful. Do you? We can find no cross reference for RC12YX to any NGK number, but RC12YC does cross to NGK BCPR5ES .
Are lawn mower spark plugs pre-gapped?
Summary. Lawnmower spark plugs can come pre-gapped, but this depends on the manufacturer. However, in most cases, the gap can be too small or too big, which can lead to ignition problems. … Spark plugs need to be pre-gapped to ensure proper ignition of the air and fuel mixture.
What does the number mean on NGK Spark Plugs?
The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type.
What do the letters on NGK Spark Plugs mean?
The first letter of the NGK spark plug code (in this case a “D”) indicates the thread size of the spark plug. There are three spark plug thread sizes currently being used in motorcycles and ATVs. “B” indicates a 14 mm x 1.25 pitch size, “D” indicates a 12 mm x 1.25 size and “C” indicates a 10 mm x 1.0 size.
What happens if the spark plug gap is wrong?
Consequences of Incorrect Spark Plug Gap
If the spark plug gap is incorrectly set, it can lead to engine issues. The customer may experience loss of power, misfires, spark plug fouling, increased plug wear, or poor gas mileage.
What happens if you use the wrong spark plug in a lawn mower?
The engine may not start. And, if it does, using too cool of a plug may cause it to foul either causing the engine to stall, or make future starts after the initial, difficult.
Can I use car spark plugs in lawn mower?
The spark plugs in both types of engine work on the same basic principle. … Some automotive and lawn mower spark plugs may be interchangeable, but many others are not because of physical differences.
What is the best spark plug for small engines?
Our Top Picks
- Best Overall. Champion Copper Plus 71 Spark Plug. Photo: amazon.com. …
- Best Bang For The Buck. Maxpower 334058 Spark Plug For Riding Mowers. Photo: amazon.com. …
- Upgrade Pick. E3 Spark Plugs E3. …
- Best Platinum. Briggs & Stratton 5062K Spark Plug Platinum. …
- Best Iridium. Fram Autolite XP5325 Iridium XP Spark Plug.