87-892150Q02 Aftermarket Mercruiser Ignition Sensor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Thunderbolt Distributor Ignition Sensor - Replaces Part Number: 87-892150Q02

New aftermarket distributor sensor replacing MerCruiser 87-892150Q02. It installs inside Thunderbolt IV/V V6 and V8 distributors and supplies the ignition-trigger signal.

⚙️ Key Features

• Thunderbolt IV/V distributor trigger sensor

• Supports V6 and V8 marine distributors

• Marine-sealed wiring and connector

• Direct replacement mounting pattern

• Works with the external Thunderbolt ignition module and coil

🧰 Kit / Assembly Contents

• 1 × Distributor ignition sensor assembly - Part Number: 87-892150Q02

• 1 × Integrated sensor lead/connector - supplied with sensor P/N 87-892150Q02

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 87-892150Q02 → Supersedes/cross-references 87-892150A02 and 87-861780A2/Q2/Q4/Q04

• 87-91019A2/A3/A6 (earlier sensor references)

OEM / Related Numbers:

• 87-892150A02

• 87-861780A2

• 87-861780Q2

• 87-861780Q4

• 87-861780Q04

• 87-91019A2

• 87-91019A3

• 87-91019A6

Aftermarket / Verified Equivalents:

• Sierra: 18-5116-1

• CDI Electronics: E11-0005

• GLM: 73110

• Mallory: 9-29804

🚤 Compatibility

Commonly used on:

• MerCruiser Thunderbolt IV/V distributor ignition systems

Typically suits:

• Engine / Equipment models:

• 4.3L V6 Thunderbolt engines

• 5.0L and 5.7L V8 Thunderbolt engines

• 7.4L and 8.2L big-block Thunderbolt engines

• Specified 350 Mag MPI distributor applications retaining Thunderbolt ignition

• HP / Output Range: Approximately 175HP - 500HP

• Engine / System Type: GM V6 or V8 petrol marine engine with Thunderbolt distributor ignition

• Year Range: Approximately 1981 - 1997 on principal applications; serial-dependent

• Serial / Component Identification: Confirm Thunderbolt distributor and sensor connector.

🔌 Function

The distributor ignition sensor detects rotor-shaft position and sends the trigger signal used by the Thunderbolt ignition system to control coil firing and spark timing.

Common signs of failure / service requirement:

• Crank/no-start with no ignition trigger

• Intermittent engine shutdown or restart after cooling

• Erratic timing or tachometer operation

• Weak or inconsistent spark across multiple cylinders

• Corrosion, damaged sensor wiring or internal distributor moisture

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging