Description

Mercury MerCruiser Quicksilver 8M6001254 is a genuine OEM distributor rotor for marinized General Motors 4-cylinder MerCruiser engines using Delco Electronic Spark Timing (EST) ignition systems. It is designed to transfer spark through the distributor system with reliable ignition performance in marine service.

Key Features

• Genuine Mercury MerCruiser Quicksilver OEM part
• Distributor rotor for GM 4-cylinder MerCruiser applications
• For Delco EST ignition systems
• High strength-to-weight rotor design for durability
• Coated brass rotor blade designed to help resist RFI interference with onboard electronics
• Use with Quicksilver distributor cap 811635T3

Engine Compatibility
Fits marinized General Motors 4-cylinder MerCruiser engines equipped with Delco Electronic Spark Timing (EST) ignition systems. Because ignition parts are distributor-specific, fitment should still be confirmed by engine model, serial number, and installed distributor cap/rotor setup before ordering.

Serial Number Fitment Notice
Fitment should be confirmed by engine serial number and ignition system configuration, not by engine family alone. Match the existing rotor and confirm the engine uses the Delco EST distributor setup and cap 811635T3 before purchase.

When This Part Needs Replacement
Replace when the rotor shows burning, carbon tracking, corrosion, cracking, looseness, or visible contact wear, or when ignition service reveals weak or inconsistent spark transfer. Rotor condition directly affects spark delivery and ignition reliability.

Installation Notes
Install only on the correct Delco EST 4-cylinder distributor application. Confirm the replacement matches the removed rotor exactly before installation, and inspect the distributor cap at the same time. Mercury specifically identifies this rotor for use with distributor cap 811635T3.

Alternate / Superseded Part Numbers

• 8M6001254
  Current public sources searched here did not show a well-supported superseded Mercury number beyond 8M6001254 itself.

Parts Desk Insight
The key match point on 8M6001254 is the ignition family. This rotor is specifically tied to the GM 4-cylinder Delco EST setup, so confirming the distributor cap family first is the fastest way to avoid mixing it up with other MerCruiser rotors that look similar but fit different distributor systems.

Ships same or next day for fast Canada wide shipping.