Mercury MerCruiser Quicksilver Delco EST Four-Cylinder Distributor Cap 811635T3
In stock items ship same or next day.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Product Description
Mercury MerCruiser Quicksilver 811635T3 is the distributor cap for marinized GM four-cylinder engines equipped with Delco EST electronic spark-timing ignition. This part is the cap only; the rotor is a separate service component.
Key Features
- PBT / PET plastic blend designed for stiffness and resistance to warping.
- Solid brass inserts help resist corrosion and electrical pitting.
- Designed to limit radio-frequency interference with onboard electronics.
- OEM cap reference: 811635T3; GTIN: 745061070431.
Engine Compatibility
Use on the GM four-cylinder MerCruiser Delco EST distributor arrangement specified by the engine parts catalog. Confirm the distributor type as well as the engine serial number, especially if the ignition system has previously been converted.
Replacement and Installation
Inspect the cap for cracks, carbon tracking, moisture and worn or corroded terminals. Keep the ignition leads in their correct positions and follow the service manual for cap installation. Check the rotor during the same inspection.
Alternate and Related References
- Supersedes 811635, 802467 and 811635T.
- Matching rotor reference: 8M6001254, specified by Mercury for use with cap 811635T3.
Parts Desk Insight
Four-cylinder engines can use different ignition systems. Match Delco EST distributor hardware before ordering the cap.
Manufacturer Parts Lookup
Use Mercury’s official parts finder to check the part against your engine or drive serial number.
Related Part
For the matching four-cylinder Delco EST system, see the Quicksilver distributor rotor 8M6001254. Confirm both components against the installed ignition system.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.