Mercury 805759T-3 MerCruiser GM V8 Cap & Rotor Kit

Mercury-MerCruiser 805759T3 Cap and Rotor Kit for GM V8 Engines

The Mercury-MerCruiser 805759T3 Cap and Rotor Kit is a genuine replacement ignition service kit for marinized General Motors V8 engines with Thunderbolt IV and Thunderbolt V HEI ignition systems. This kit helps restore proper spark delivery when replacing a worn, damaged, or corroded distributor cap and rotor.

Designed for demanding marine ignition applications, this kit includes one coated brass rotor blade, gasket, and distributor cap designed to resist RFI interference with onboard electronics. Replacing worn ignition components helps support reliable starting, smooth running, and peak engine performance.

Product Features:

• Genuine Mercury-MerCruiser cap and rotor kit
• Fits marinized GM V8 engines with Thunderbolt IV and V HEI ignition systems
• Includes coated brass rotor blade, gasket, and distributor cap
• Designed to resist RFI interference with onboard electronics
• Helps restore proper spark delivery and ignition performance
• Useful for replacing worn, damaged, or corroded cap and rotor components
• Built to Mercury Marine fit, function, and performance standards

Product Details:

• Brand: Mercury-MerCruiser
• Manufacturer Part Number: 805759T3
• Listing Part Number: 805759T-3
• Part Type: Cap and Rotor Kit
• System: Ignition system
• Ignition Type: Thunderbolt IV and Thunderbolt V HEI ignition
• Application: Marinized General Motors V8 engines

Kit Includes:

• Distributor cap
• Coated brass rotor blade
• Gasket

Fits Select Applications:

• GM V8 marine engines with Thunderbolt IV HEI ignition where specified
• GM V8 marine engines with Thunderbolt V HEI ignition where specified

Replaces / Interchange:

• Mercury 805759Q-3
• GLM 71780
• Mallory 9-29350
• Sierra 18-5273

Service Note: See your Mercury-MerCruiser service manual for distributor cap orientation, rotor installation, gasket placement, ignition inspection, and tune-up procedures for your specific engine.

Fitment Note: Cap and rotor kit fitment should be verified by engine model, serial number, ignition system type, distributor style, parts diagram, and existing part number before ordering. Please confirm this kit is correct for your GM V8 Thunderbolt IV or V HEI ignition application before purchasing.

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