Mercury Distributor Cap & Rotor Kit – 815407T5
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Mercury MerCruiser Quicksilver 815407T5 is a genuine OEM distributor cap and rotor kit for GM V6 MerCruiser engines using Thunderbolt IV and Thunderbolt V HEI ignition systems. Current Mercury parts sources and major OEM-focused retailers consistently identify this kit as the correct cap-and-rotor service set for this ignition family.
Key Features
- Genuine Mercury MerCruiser Quicksilver OEM kit
- Distributor cap and rotor kit
- Designed for GM V6 MerCruiser applications
- For Thunderbolt IV and Thunderbolt V HEI ignition systems
- Commonly described with brass rotor / RFI-resistant ignition design in current listings
- Service replacement for worn cap-and-rotor ignition components.
Engine Compatibility
Common current listings describe 815407T5 for GM V6 MerCruiser engines with Thunderbolt IV and V HEI ignition. Several sources specifically tie it to 4.3L V6 MerCruiser applications, including 1985-up references in aftermarket fitment listings. Fitment should still be confirmed by engine model, serial number, and installed distributor setup before ordering.
Serial Number Fitment Notice
Fitment should be confirmed by MerCruiser engine serial number and ignition configuration, not by engine family alone. The safest match is by OEM part number 815407T5 and the installed Thunderbolt IV / V HEI distributor 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, wear, looseness, or inconsistent spark transfer. Cap-and-rotor wear can lead to hard starting, rough running, and ignition misfire.
Installation Notes
Install only on the correct GM V6 Thunderbolt IV / V HEI distributor application. Confirm the replacement matches the removed cap and rotor before installation. Several current replacement listings also note overlap with older Mercury number 815407Q5, but distributor and engine match should still be confirmed before ordering.
Alternate / Superseded Part Numbers
- 815407T5
- 815407Q5
- 13753A2
- 815407A2
- 11108A3
- 815407Q02
- Sierra 18-5274
- GLM 71790.
Parts Desk Insight
The key match point on 815407T5 is the ignition family. This kit is consistently tied to the GM V6 Thunderbolt IV / V HEI setup, which helps separate it from Delco EST and V8 cap-and-rotor kits that can look similar but do not interchange.
Ships same or next day for fast Canada wide shipping. ⚓
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.