What kind of spark plug does a Craftsman lawn mower take?

The Craftsman 4.5hp mower uses either a Champion model RJ19LM or J19LM spark plug, or equivalent, with the gap set at .

How do I know which spark plug for my lawn mower?

Spark plugs are typically located on the back or side of a lawn mower engine. Look for a short wire that’s about 1/4-in. -thick leading to the top of a short, cylindrical protrusion from the engine. If you’re not sure where the spark plug is, consult your owner’s manual.

Will any spark plug work in a 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.

Are lawn mower spark plugs universal?

Spark plugs aren’t universal; you have to make sure that you buy one that fits your mower. … If you no longer have the manual or the number has rubbed off, you can always remove the plug first and take it to AutoZone with you.

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What type of spark plug does a Briggs and Stratton?

Flathead Engine Spark Plugs & Gaps

Replacement Part Type Briggs & Stratton Spark Plug Part Number Spark Plug Gap
Electromagnetic Suppression (EMS) (Replaces Champion QC12YC) 691043 792015 .030”
Extended Life Series® OHV Spark Plug Platinum (Replaces Champion RC12YC) 696202 5066 (5066D, 5066H) .030”

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.

What is the difference between RC12YC and RC14YC spark plug?

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.

How often should you change the spark plug in a lawn mower?

When To Check & Replace Spark Plugs

For standard lawn mower and small engine maintenance, you should check and/or replace spark plugs: once a season. every 25 hours of use.

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.
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When should I change my lawn mower spark plug?

Replace spark plugs as often as is recommended by the manufacturer.

  • Change spark plugs at the beginning of every mowing season (in the spring) and/or every 100 hours of use.
  • Use the same spark plugs recommended by the manufacturer of your lawn tractor or push mower.

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How long does a lawn mower spark plug last?

Typically, the consensus among the mechanical engineer community is that a spark plug for a lawn mower will last up to 25 hours of use. Some users simply prefer to replace it every mowing season as a part of their yearly lawn mower maintenance.

Are small engine spark plugs universal?

While specific spark plug models are not universal, all working engines require a spark plug. … You should always check with the manufacturer or your owner’s manual to find spark plugs that are compatible with your mower.

Do Autozone spark plugs come pre gapped?

You may need to gap your spark plugs before installing them. Some plugs come pre-gapped, and if this is the case it will say so on the box. Otherwise you’ll need a gap tool to gap your new plugs according to the specifications in your owner’s manual.

What spark plug do I need for a 5hp Briggs and Stratton?

Briggs and Stratton Part No. 5066 (spark plug may have production number 694385 printed on porcelain) – Platinum Spark plug (Replace Champion RC12YC).

How do I know if my spark plugs need changing?

8 Signs the Spark Plugs or Spark Plug Wires Need Replacing:

  1. Regular Maintenance. Check the owner’s manual for the replacement interval. …
  2. Spark Plug Wires. …
  3. Fuel Economy Degradation. …
  4. Slower Acceleration. …
  5. Rough Idling. …
  6. Engine Misfires. …
  7. Difficulty Starting. …
  8. Warning Lights.
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Finding the Proper Gap Setting

The gap setting is different for each vehicle but most are somewhere between 0.028″ and . 060″. Consult the owner’s manual or Champion ® catalog to find the recommended setting for the vehicle you’re working on.

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