Briggs & Stratton 491055S EPA Emission Applicable Spark Plug

Last updated: February 6, 2023

Briggs & Stratton 491055S EPA Emission Applicable Spark Plug

Our Review Process

Don't Waste Your Money is focused on helping you make the best purchasing decision. Our team of experts spends hundreds of hours analyzing, testing, and researching products so you don't have to. Learn more.

Don't Waste Your Money Seal of Approval
Look for the DWYM seal for products that are the best in the category.
Show Contents

We looked at the top Spark Plugs and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Spark Plug you should buy.

Overall Take

If you have a 3-cylinder liquid cooled engine, you'll want to opt for this spark plug. It's designed to improve fuel economy, which will save you money over the long run. The plug is also quality made, so you can count on it lasting longer than other models on the market.

In our analysis of 12 expert reviews, the Briggs & Stratton EPA Emission Applicable Spark Plug placed 5th when we looked at the top 12 products in the category. For the full ranking, see below.

From The Manufacturer

Genuine Briggs & Stratton replacement part for small gasoline engines. This OEM part ensures proper fit and performance to maintain the life of your Briggs & Stratton engine. Only Briggs & Stratton genuine parts are specially designed to exact OEM standards, manufactured and tested to help deliver optimum performance in Briggs & Stratton engines.

Expert Reviews


What experts liked

What experts didn't like

Overview

All machines that use gasoline engines are outfitted with spark plugs. This includes automobiles, lawnmowers, watercraft and aircraft. Spark plugs are responsible for creating the electricity needed to ignite the fuel mixture to start the combustion process and turn on the engine. Depending on the type of machine, you will most likely be able to replace the spark plugs on your own, without having to schedule an appointment with a mechanic.

As you begin shopping for the best spark plug, you’ll want to first make sure the plug meets International Organization for Standardization (ISO) and Society of Automobile Engineers (SAE) standards. You don’t want to invest money in a spark plug that won’t deliver reliability and durability.

Look for a spark plug that is able to improve your gas mileage and provide a faster start. For example, the NGK G-Power Spark Plug, 4-Pack uses a G-power platinum alloy that enhances its performance. The ground and center electrodes are able to retain a precise gap, while also creating a greater spark.

Review the spark plug’s outer shell next. You’ll find the Champion RC12YC Spark Plug uses a special TinTac and ULTRASEAL shell to protect the spark plug from corrosion. Corrosion is a spark plug’s enemy and will lead to the plug needing to be replaced prematurely.

Examine the design of the spark plug’s tip next. For example, the DENSO PLATINUM T T Spark Plugs, 6-Pack has a specially designed twin-tip that increases its ability to ignite. Others are made from a .6 millimeter laser-welded fine platinum that reduces the voltage required to start the engine.

Consider a spark plug that is designed to handle intense conditions if you’re into power sports. Models made using a yttrium-enhanced alloy to that reduce side wire temperature by 8% are a good choice. This type may also be made with colder heat ranges, so you can make modifications to increase performance.

More to explore