Crafted Bosch – 7539 – HS5E Small Engine Spark Plug

DESCRIPTION

Heavy duty yttrium-enhanced center electrode with copper core provides superior reliability and durability. Tapered cut nickel chromium ground electrode assists in cold weather starts and provides increased ignitability. Nickel-plated rolled threads provide anti-seize and corrosion protection. Metal glass fused resistor gives maximum interference suppression. Angular, 5-rib insulator design prevents flashover.

PRODUCT SPECIFICATIONS

Shell

Thread Diameter – 14 mm

Thread Pitch – 1.25 mm

Seat Type – Tapered

Reach – 11 mm (7/16″)

Hex Size – 5/8″ (16 mm)

Terminal Type – Removable Nut

Gap – .020″ (0.5 mm)

Center Electrode

Material – Nickel

Type – Standard

Size – 2.5 mm

Projection – Non-Projected

Ground Electrode

Material – Nickel

Type – Standard

Quantity – 1

Specifications

Resistor – No

Heat Range – 5

Torque Specs – Cast Iron: 15-29 lb. ft. Aluminum: 8-14 lb. ft.

Part Information

Brand – Bosch

Longevity – 30k Miles

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