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ACDelco MR43LTS Resistor Marine Spark Plug

Manufacturer

ACDelco

<p>ACDelco is an American automotive parts brand owned by General Motors, with a legacy that stretches back more than a century. Founded in 1916 by William C. "Billy" Durant as United Motors Corporation, the brand has evolved into one of the most trusted names in automotive replacement parts. In 1974, General Motors merged AC Spark Plug's aftersales operation with United Delco to create AC-Delco, and in 1995 the hyphen was dropped and ACDelco received a new logo and marketing initiative, establishing the modern brand identity recognized worldwide today.</p> <h3>A Heritage of Innovation and Quality</h3> <p>ACDelco's roots trace back to some of the most innovative companies in early automotive history. The brand encompassed Dayton Engineering Laboratories Company (DELCO) for automotive ignition, starters and generators, along with electrical and bearing manufacturers that helped power the automotive revolution. Today, ACDelco's catalog of more than 90,000 parts across 37 lines undergoes rigorous testing and validation cycles to ensure quality, fit, form and function. This comprehensive approach to quality control has made ACDelco the go-to choice for technicians and vehicle owners who demand original equipment precision.</p> <h3>Comprehensive Product Range</h3> <p>ACDelco is the exclusive Original Equipment parts brand for Chevrolet, Buick, GMC and Cadillac, as well as provider of premium aftermarket parts for most other makes and models. The brand's expertise spans critical vehicle systems, from suspension components to braking systems to transmission electronics. When it comes to ride quality and handling, <a href="/9-acdelco-shock-absorber-7556">ACDelco shock absorbers</a> deliver the same performance specifications found in factory-installed systems. For complete suspension refresh projects, <a href="/9-acdelco-shock-absorber-kit-48166">shock absorber kits</a> provide everything needed for proper installation and optimal performance.</p> <p>Modern vehicles rely heavily on sophisticated electronic controls, and ACDelco's transmission components reflect this evolution. <a href="/9-acdelco-automatic-transmission-control-solenoid-7752">Automatic transmission control solenoids</a> from ACDelco are engineered to meet the precise hydraulic pressure requirements of contemporary transmissions, ensuring smooth shifts and long service life. Braking performance is equally critical, which is why <a href="/9-acdelco-disc-brake-rotor-1896">disc brake rotors</a> and <a href="/9-acdelco-disc-brake-pad-set-1684">disc brake pad sets</a> from ACDelco are manufactured to exacting OE specifications, providing consistent stopping power and reduced noise, vibration, and harshness.</p> <h3>Why Professionals Choose ACDelco</h3> <p>The ACDelco advantage extends beyond product quality. ACDelco was among the first aftermarket providers to focus on the importance of training technicians on proper installation techniques, demonstrating a commitment to supporting the professionals who install their parts. This dedication to education, combined with the brand's GM engineering heritage, gives technicians confidence that ACDelco components will perform as intended. Whether you're maintaining a late-model GM vehicle or servicing other makes, ACDelco offers the breadth of coverage and depth of engineering expertise that today's complex vehicles demand.</p> <p>ACDelco applications extend beyond automotive to include off-road, marine and industrial equipment, making it a versatile choice for diverse mechanical needs. With over a century of continuous improvement and innovation, ACDelco remains committed to delivering the precision, durability, and performance that both professional technicians and DIY enthusiasts expect from genuine GM engineering.</p>

Part Number

MR43LTS
06/21/2036 6:37 AM
Sale Price

$4.26

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ACDelco MR43LTS is a specialty marine spark plug designed for reliable, efficient performance in jet boats, inboards, outboards, and personal watercraft. This resistor spark plug features an M14 thread size with a 5/8-inch hex size, 0.680-inch thread reach, and comes pre-gapped to 0.040 inches.

Key Features:

  • Copper core center electrode with nickel tip material for excellent heat transfer and durability
  • Ribbed suppressor seal extends resistance and helps prevent spark flash-over and misfires
  • Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
  • Resistor value of 2,500 to 12,000 ohms for superior noise suppression
  • Heat range 3 with tapered seat design
  • Maintains stable operating temperatures under varying loads

The MR43LTS features a 51mm (2.030-inch) insulator height and 17.25mm thread reach. This spark plug comes pre-gapped from the factory to the correct specification. Ideal for marine applications requiring dependable ignition performance in harsh saltwater environments.

Products specifications

Electrode Core Material

Copper

Electrode Tip Material

Nickel alloy

Ground Strap Quantity

One

Quantity

Sold individually.

Shorty Spark Plug

No

Spark Plug Seat Style

Tapered

Spark Plug Thread Size

14mm

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