The AC MR43LTS spark plug is an essential part of any vehicle’s engine, providing a reliable and efficient source of ignition for the spark plug. With its unique design, the AC MR43LTS spark plug offers unparalleled performance and durability, offering perplexing levels of complexity combined with bursts of power. From increased fuel efficiency to improved engine longevity, the AC MR43LTS spark plug is a reliable and powerful choice for any vehicle.
Why AC MR43LTS Spark Plug Is Necessary?
The AC MR43LTS spark plug is necessary because it provides the necessary electrical spark to ignite the air/fuel mixture inside an engine cylinder. Without the spark plug, combustion would not occur and the engine would not be able to run. Additionally, the AC MR43LTS spark plug is specifically designed to provide a longer life than some other spark plugs, which means less frequent replacements for better overall engine performance.
Comperision Chart for ac mr43lts spark plug
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ACDelco MR43LTS Specialty Marine Spark Plug (Pack of 1)
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AC Eight MR43LTS Spark Plugs for Mercruiser 5.0L and 5.7L Engines
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AC Spark Plugs for 1997 and Newer Mercruiser and Volvo Penta 5.0 and 5.7 carbureted Engines MR43LTS
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RPS Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS
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ACDelco MR43LTS-48PK Spark Plug (05614210)
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ACDelco MR43LTS Specialty Marine Spark Plug (Pack of 1)

If youre looking for a reliable and durable spark plug to help keep your marine engine running smooth, look no further than the ACDelco MR43LTS Specialty Marine Spark Plug (Pack of 1). This spark plug is made by AC Delco and features a nickel alloy tip, copper core and ribbed suppressor seal for added performance and durability. Its designed specifically for marine engines, making it perfect for boat owners.
Why We Like This
Nickel alloy tip ensures long-lasting performance
Copper core helps maintain a strong spark
Ribbed suppressor seal prevents corrosion
Perfectly designed for marine engines
Comes in packs of one or more
Common Questions & Answers
Q: Is it easy to install?
A: Yes, this spark plug is easy to install. Just make sure to check your engine’s owner’s manual for the correct application before installation.
Q: How often should I replace the spark plugs?
A: It is recommended that you replace all the engine plugs at the same time. This will help ensure overall better performance. However, depending on how often you use your boat, you may need to replace them sooner.
Q: Can I clean used spark plugs?
A: While cleaning used spark plugs can help restore some of their performance, it’s best to replace them with new ones whenever possible for optimal results.
Additional Product Information
Height | 3.44 |
Length | 5.75 |
Weight | 0.72 |
Width | 4.56 |
Size | Unspecified |
AC Eight MR43LTS Spark Plugs for Mercruiser 5.0L and 5.7L Engines

The AC Eight MR43LTS Spark Plugs for Mercruiser 5.0L and 5.7L Engines are a must-have for anyone looking to optimize their engine performance. These spark plugs are designed to provide superior combustion, as well as maximum performance, power, and fuel efficiency. The spark plugs feature a nickel-plated center electrode with a copper core that resists corrosion. This ensures that your engine is running at peak efficiency for longer periods of time. The plugs also have a wide heat range that makes them ideal for both high performance applications and standard everyday use.
Why We Like This
High Performance: The AC Eight MR43LTS Spark Plugs provide superior combustion and maximum performance, power, and fuel efficiency.
Durable: The spark plugs feature a nickel-plated center electrode with a copper core which resists corrosion, making them durable and long-lasting.
Wide Heat Range: The wide heat range of the spark plugs make them suitable for both high performance applications as well as standard everyday use.
Easy Installation: These spark plugs are easy to install and require no additional tools or modifications to your engine.
Cost Effective: The AC Eight MR43LTS Spark Plugs offer excellent value when compared to other brands on the market today.
Common Questions & Answers
Q: What type of engines do these spark plugs fit?
A: These spark plugs fit Mercruiser 5.0L and 5.7L engines specifically. They may not be compatible with other engines or configurations.
Q: Are these plug replacements or upgrades?
A: These spark plugs are designed as replacements but may also serve as upgrades depending on the specific application they are being used in.
Q: How long will these spark plugs last?
A: With proper usage and maintenance, these spark plugs can last several years before needing replacement again.
Additional Product Information
Length | 4 |
Width | 4 |
AC Spark Plugs for 1997 and Newer Mercruiser and Volvo Penta 5.0 and 5.7 carbureted Engines MR43LTS

Keep your engine running smoothly with a set of four AC-Delco MR43LTS spark plugs. These spark plugs are designed specifically for 1997 and newer GM 4.3, 5.0, and 5.7 Mercruiser and Volvo Penta carbureted engines and are not meant to be used with fuel injected engines. Get the peace of mind knowing your motor will be running optimally with these reliable spark plugs.
Why We Like This
Set of four AC Delco MR43LTS spark plugs
Fits 1997 and newer GM 4.3, 5.0, 5.7 Mercruiser and Volvo Penta Carbureted engines
Does not fit fuel injected engines
Get the peace of mind knowing your motor will be running optimally with these reliable spark plugs
Order two sets for a total of 8 spark plugs
Common Questions & Answers
Q: What type of engine do these spark plugs work in?
A: These spark plugs are designed specifically for 1997 and newer GM 4.3, 5.0, and 5.7 Mercruiser and Volvo Penta carbureted engines only; they do not fit fuel injected engines.
Q: Do I need more than one set?
A: Yes, order two sets for a total of 8 spark plugs.
Q: What brand is this product?
A: This product is made by AC Delco
Additional Product Information
RPS Mercruiser Thunderbolt 4.3 L V6 DISTRIBUTOR CAP ROTOR SPARK PLUG WIRES KIT SET WITH MR43LTS PLUGS

The RPS Mercruiser Thunderbolt 4.3 L V6 Distributor Cap Rotor Spark Plug Wires Kit Set With MR43LTS Plugs is a great way to keep your engine running optimally. This set comes with a new distributor cap, rotor, spark plug wires and six AC Delco MR43LTS spark plugs, all compatible with Mercruiser V6 engines with Thunderbolt ignition 1997 and newer. The 8mm plug wires provide a strong connection and the distributor cap is J1171 certified, boasting quality copper contacts. Included in the set are new bolts, gasket, drain for cap as well as dialectic grease for the wires. This kit is compatible with Mercruiser ‘s 84-816761Q16, 815407Q5.
Why We Like This
The kit comes complete with all the necessary components for proper engine maintenance.
It is specifically designed for Mercruiser V6 engines with Thunderbolt ignition 1997 and newer.
The 8mm plug wires provide a strong connection between the distributor and spark plugs.
The distributor cap is J1171 certified to ensure quality copper contacts.
Included in the kit are new bolts, gasket, drain for cap as well as dialectic grease for the wires.
Common Questions & Answers
Q: Does this kit work on other engines?
A: No, this kit is only compatible with Mercruiser V6 engines with Thunderbolt ignition 1997 and newer.
Q: Does it include spark plugs?
A: Yes, it includes six AC Delco MR43LTS spark plugs.
Q: Is it easy to install?
A: Yes, it can be installed relatively easily following included instructions or by referring to an online tutorial or manual for further guidance.
Additional Product Information
Length | 6 |
Width | 6 |
ACDelco MR43LTS-48PK Spark Plug (05614210)

ACDelco MR43LTS-48PK Spark Plug is the perfect choice for those who are looking for a high performance, reliable spark plug. With a 48 pack of these spark plugs, you’ll be able to replace all of your old spark plugs and keep your engine running at its peak performance. This spark plug is designed to be durable and it features an improved design with longer life. It’s also designed to resist carbon buildup and pre-ignition which can cause engine damage. These spark plugs have a nickel alloy center electrode that ensures maximum spark plug life and excellent heat dissipation.
Why We Like This
Durable Design: The ACDelco MR43LTS-48PK Spark Plug is designed to be durable and reliable with its improved design.
Longer Life: With the nickel alloy center electrode, you can ensure maximum spark plug life.
Carbon Buildup Resistance: This spark plug will help prevent carbon buildup in your engine which can lead to engine damage.
Heat Dissipation: The nickel alloy center electrode ensures excellent heat dissipation from the spark plug so your engine remains cool while running at peak performance.
Cost-Effective: With a 48 pack of these reliable, high performing spark plugs, you’ll save money on replacements while keeping your engine running smoothly.
Common Questions & Answers
Q: What type of vehicle does this work in?
A: The ACDelco MR43LTS-48PK Spark Plug is designed to fit most standard automotive applications. Before purchasing, please check your vehicle’s manual or online resources for compatibility information.
Q: How often should I replace my spark plugs?
A: Depending on the age of the vehicle and how often it’s driven, it’s recommended that you replace your spark plugs every 30,000 miles or once every two years (whichever comes first). If you notice any signs of wear or if the performance of your vehicle has decreased significantly, then its best to replace them sooner rather than later.
Q: Does this come with installation instructions?
A: Yes, this product includes detailed installation instructions that will help guide you through the process step by step.
Additional Product Information
Benefits of AC MR43LTS Spark Plug
1. Superior firing and fuel efficiency: AC MR43LTS spark plugs use a patented V-Trimmed Platinum firing tip which ensures superior firing performance and improved fuel efficiency.
2. Increased power and acceleration: The superior design of the AC MR43LTS spark plug delivers increased power and acceleration for a smoother, more responsive ride.
3. Longer life span: The durable construction and materials used in the AC MR43LTS spark plug ensure a longer life span, meaning fewer replacements over time.
4. Better engine performance: With a reliable ignition system, the AC MR43LTS spark plug helps to provide better engine performance by reducing misfires and providing a smoother running engine.
5. Improved fuel economy: The improved combustion chamber design of the AC MR43LTS spark plug helps to reduce emissions while increasing fuel efficiency, thus saving money on fuel costs over time.
Buying Guide for ac mr43lts spark plug
Product Overview:
The AC MR43LTS spark plug is a copper core spark plug manufactured by AC Delco. It is designed to be used in older model vehicles and motorcycles. The spark plug has a 14 mm thread size and is made of a nickel alloy center electrode, a copper core, and an alloy shell. It is designed to provide reliable ignition performance while also being resistant to corrosion and pre-ignition damage.
Features:
Nickel alloy center electrode for improved durability
Copper core for improved heat transfer
Alloy shell for increased strength
14 mm thread size for compatibility with older model vehicles
Resistant to corrosion and pre-ignition damage
Designed to provide reliable ignition performance
How to Use:
1. Locate the spark plug in the engine compartment of your vehicle or motorcycle.
2. Use a socket wrench to loosen and remove the old spark plug from its mounting hole.
3. Carefully inspect the old spark plug for any signs of wear or damage, such as cracks on the shell or electrodes that are bent or broken off. If there is any wear or damage, replace the old spark plug with a new one immediately.
4. Install the new AC MR43LTS spark plug into its mounting hole using the socket wrench, making sure that it is securely tightened in place.
5. Reattach any electrical connections that were disconnected when you removed the old spark plug, such as a high tension wire or coil wire connector if applicable to your vehicle or motorcycle model.
Maintenance:
It is important to regularly inspect and maintain your AC MR43LTS spark plugs in order to ensure proper engine performance and fuel economy. Inspect them every 10,000 miles (16,000 km) for signs of excessive wear or damage such as cracks on the shell or electrodes that are bent or broken off. If there are any signs of wear or damage, replace them immediately with new ones in order to maintain optimal engine performance and fuel economy
The AC MR43LTS Spark Plug is a reliable and durable spark plug that has been designed with the latest technology to provide a powerful ignition spark. Its nickel-plated shell resists corrosion and its top firing design ensures a strong and consistent spark for optimal engine performance. With its superior construction, this spark plug is designed to provide years of reliable service for any vehicle.