Mercury MerCruiser Quicksilver Cap & Rotor Kit 811635K2

Mercury / MerCruiser Quicksilver Cap & Rotor Kit 811635K2

The Mercury Quicksilver 811635K2 is a genuine OEM distributor cap and rotor service kit designed for MerCruiser 3.0L four-cylinder engines with Delco EST ignition systems. This kit replaces two key ignition components that distribute high-voltage spark from the ignition coil to the spark plugs.

Key Details

• Part Number: 811635K2

• Component Type: Distributor cap and rotor kit

• Ignition System: Delco EST

• OEM Brand: Mercury Marine / Quicksilver

• Includes: Distributor cap and rotor assembly

Compatible Engines

Typically used on:

• MerCruiser 3.0L 4-cylinder sterndrive engines

• GM-based 3.0L marinized engines using Delco EST ignition

These engines are commonly found in:

• Bowriders

• Small cruisers

• Fishing boats with Alpha drives

Features

• Marine-grade PBT/PET cap housing for strength and heat resistance

• Solid brass terminals that resist corrosion and electrical pitting

• Designed to maintain clean spark distribution and proper ignition timing

• Direct OEM replacement with exact factory fit

Purpose

The distributor cap and rotor:

• Route ignition voltage to the correct spark plug

• Maintain proper firing order and timing

• Ensure smooth engine starting and idle

When worn, symptoms can include:

• Hard starting

• Misfires

• Rough idle

• Loss of power

Fitment Tip:
Always confirm compatibility using the engine serial number. MerCruiser ignition components vary between Delco EST, Thunderbolt IV, and later ignition systems, and the cap/rotor style must match the distributor type.

Shipping: Ships same or next day for fast Canada wide shipping.