Mercury Distributor Cap & Rotor Kit – 805759T3
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Mercury MerCruiser Quicksilver 805759T3 is a genuine OEM distributor cap and rotor kit for marinized GM V8 MerCruiser engines using Thunderbolt IV and V HEI ignition systems. Mercury says the kit is built from a PBT/PET plastic blend for strength and warpage resistance, and includes a coated brass rotor blade, gasket, and cap designed to help resist RFI interference with onboard electronics.
Key Features
- Genuine Mercury MerCruiser Quicksilver OEM kit
- Distributor cap and rotor kit
- Fits GM V8 engines with Thunderbolt IV & V HEI ignitions
- Includes distributor cap, rotor, and gasket
- Cap made from PBT/PET plastic blend for strength, stiffness, and resistance to warpage
- Coated brass rotor blade designed to help resist RFI interference with onboard electronics
Engine Compatibility
Fits marinized GM V8 MerCruiser engines with Thunderbolt IV and V HEI ignition systems. Public fitment references commonly associate this family with 5.0L, 5.7L, 7.4L, and 8.2L GM-based V8 applications, but fitment should still be confirmed by engine model and serial number before ordering.
Serial Number Fitment Notice
Fitment should be confirmed by MerCruiser engine serial number and installed ignition configuration, not by engine family alone. Mercury’s parts catalog is the safest final check for exact application.
When This Part Needs Replacement
Replace when the distributor cap shows carbon tracking, terminal corrosion, cracking, or moisture intrusion, or when the rotor shows burning, looseness, or inconsistent spark transfer. Worn cap-and-rotor components can cause hard starting, rough running, and ignition misfire. This is an inference based on the kit’s function as an ignition service replacement.
Installation Notes
Install only on the correct GM V8 Thunderbolt IV / V HEI distributor application. Confirm the replacement matches the removed cap, rotor, and gasket before installation. One OEM-focused parts source identifies the included components as gasket 27-805760, rotor 13524T1, and distributor cap 805759T1.
Alternate / Superseded Part Numbers
- 805759T3
- 805759Q3
- Distributor cap 805759T1
- Rotor 13524T1
- Gasket 27-805760
Parts Desk Insight
The main match point on 805759T3 is the ignition family: GM V8 with Thunderbolt IV / V HEI. That is the quickest way to separate it from Delco EST and 4-cylinder or V6 cap-and-rotor kits that can look similar but do not interchange.
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Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.