Description
This Mercury part fits select GM V8 engines with Thunderbolt IV & V HEI ignitions. Please verify fitment using your engine model or serial number before ordering. View full description.
Total Price:
Add to CartThe 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.
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.
What is the Mercury-MerCruiser 805759T3 Cap and Rotor Kit used for?
The Mercury-MerCruiser 805759T3 Cap and Rotor Kit is a genuine replacement ignition service kit for marinized GM V8 engines using Thunderbolt IV or Thunderbolt V HEI ignition systems. It is intended to replace worn, damaged, or corroded distributor cap and rotor components and help restore proper spark delivery and ignition performance.
Which engines does the Mercury-MerCruiser 805759T3 Cap and Rotor Kit fit?
This cap and rotor kit is designed for select marinized GM V8 marine engines with Thunderbolt IV or Thunderbolt V HEI ignition systems where specified. Fitment should be verified using your engine model, serial number, ignition system type, distributor style, parts diagram, and existing part number before ordering.
What is included in the Mercury-MerCruiser 805759T3 Cap and Rotor Kit?
The kit includes one distributor cap, one coated brass rotor blade, and one gasket. The distributor cap is designed to resist RFI interference with onboard electronics, while the coated brass rotor blade is included as part of the ignition service kit.
Can the Mercury-MerCruiser 805759T3 replace worn or corroded ignition components?
Yes. The kit is intended for replacing worn, damaged, or corroded distributor cap and rotor components. Replacing these ignition components helps restore proper spark delivery and supports reliable starting, smooth running, and peak engine performance as described for the product.
What Mercury-MerCruiser part numbers are interchangeable with 805759T3?
The Mercury-MerCruiser 805759T3 Cap and Rotor Kit is listed as replacing or interchangeable with Mercury 805759Q-3, GLM 71780, Mallory 9-29350, and Sierra 18-5273. Verify the existing part number and your engine's ignition system before using an interchangeable number to confirm the correct application.
Where can I find installation instructions for the Mercury-MerCruiser 805759T3 Cap and Rotor Kit?
The product description directs users to the Mercury-MerCruiser service manual for distributor cap orientation, rotor installation, gasket placement, ignition inspection, and tune-up procedures for the specific engine. The exact installation procedure is not provided in the product description, so the applicable service manual should be followed.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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