Ignition Sensor Kit – Fits MerCruiser Thunderbolt IV & V Ignition (Replaces 87-892150Q02, 87-91019A3)
Ignition Sensor Kit – Fits MerCruiser Thunderbolt IV & V Ignition (Replaces 87-892150Q02, 87-91019A3)

Ignition Sensor Kit – Fits MerCruiser Thunderbolt IV & V Ignition (Replaces 87-892150Q02, 87-91019A3)

Vendor: JLM Marine
Availability: In Stock
Product Type: Ignition Switch
$26.99
$32.00
$26.99
Subtotal: $26.99

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Ignition Sensor Kit – Fits MerCruiser Thunderbolt IV & V Ignition (Replaces 87-892150Q02, 87-91019A3)

Ignition Sensor Kit – Fits MerCruiser Thunderbolt IV & V Ignition (Replaces 87-892150Q02, 87-91019A3)

$32.00 $26.99
Ignition Sensor Kit – Fits MerCruiser Thunderbolt IV & V Ignition (Replaces 87-892150Q02, 87-91019A3)

Ignition Sensor Kit – Fits MerCruiser Thunderbolt IV & V Ignition (Replaces 87-892150Q02, 87-91019A3)

$32.00 $26.99
Descripción

Ignition Sensor Kit – Fits MerCruiser Thunderbolt IV & V Ignition (Replaces 87-892150Q02, 87-91019A3)

This ignition sensor kit is designed for MerCruiser V6 and V8 marine engines (4.3L, 5.0L, 5.7L, 7.4L, 8.2L) equipped with Thunderbolt IV and V electronic ignition systems from 1981–1997. It serves as a direct replacement, ensuring reliable ignition performance for a wide range of popular marine engines.

Engineered for the harsh marine environment, this sensor features a glass-filled polyester housing for enhanced durability and corrosion resistance, ensuring a long service life.

  • Direct Installation: Mounts directly in the distributor for a hassle-free replacement of the original sensor.
  • Complete Kit: Includes the ignition sensor, lead wires with connectors, and all necessary mounting hardware.
  • Broad Compatibility: Replaces a wide range of OEM part numbers for MerCruiser, Sierra, Mallory, and more.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Mercury/MerCruiser 87-892150Q02
Mercury/MerCruiser 87-892150A02
Mercury/MerCruiser 87-91019A3
Mercury/MerCruiser 87-91019A2
Mercury/MerCruiser 861780A2
Mercury/MerCruiser 861780Q4
Mercury/MerCruiser 87-892150K02
Sierra 18-5116-1
Mallory 9-29804
CDI E11-0005
GLM 73110

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Brand Model Rated HP Stroke Years OEM Part No. Notes
MerCruiser 4.3L (2 BBL.) 175-185 4-Stroke 1985-1992 87-91019A2 GM 262 V-6
MerCruiser 4.3L (GEN II) 4-Stroke 1992-1993 87-91019A2 GM 262 V-6
MerCruiser 4.3LX (4 BBL.) 205 4-Stroke 1987-1992 87-91019A2 GM 262 V-6
MerCruiser 5.0L (4 BBL.) 200-230 4-Stroke 1981-1995 87-91019A2 GM 305 V-8
MerCruiser 5.0LX (4 BBL.) 4-Stroke 1988-1995 87-91019A2 GM 305 V-8
MerCruiser 5.7L 260-350 4-Stroke 1986-1995 87-91019A2 GM 350 V-8
MerCruiser 5.7L COMPETITION SKI 4-Stroke 1987-1995 87-91019A2 GM 350 V-8
MerCruiser 5.7L MIE 4-Stroke 1988-1995 87-91019A2 GM 350 V-8
MerCruiser 7.4L 320-425 4-Stroke 1981-1996 87-91019A2 GM 454 V-8
MerCruiser 8.2L 425-500 4-Stroke 1990-1996 87-91019A2 GM 502 V-8
MerCruiser 350 MAG ALPHA 4-Stroke 1986-1995 87-91019A2 GM 350 V-8
MerCruiser 454 MAG ALPHA 4-Stroke 1986-1988 87-91019A2 GM 454 V-8
MerCruiser 454 MAG BRAVO 4-Stroke 1988-1994 87-91019A2 GM 454 V-8
MerCruiser 502 MAG BRAVO 4-Stroke 1990-1993 87-91019A2 GM 502 V-8
MerCruiser 500 BULLDOG 4-Stroke 1990-1996 87-91019A2 GM 540 V-8
MerCruiser 575 4-Stroke 1986-1992 87-91019A2 GM 540 V-8
MerCruiser 600 SC 4-Stroke 1991-1996 87-91019A2 GM 502 V-8

Technical Specifications

Specification Value
Product Type Ignition Sensor Kit
Installation Direct replacement
Housing Material Glass-filled polyester
Connection Lead wires with connectors
Maximum Supply Voltage 12 Volts
Mounting Type Flange Mount
Output Type Electrical signal
Dimensions 160 × 76 × 56 mm (6.3 × 2.99 × 2.2 inches)
Weight 0.132 kg (4.66 ounces)
Other Technical Attributes Designed for marine applications with corrosion resistance

Package Contents

  • 1 x Ignition Sensor
  • 1 x Set of Lead Wires with Connectors
  • 1 x Hardware Kit (mounting screws and fasteners)

Installation Guide

Follow these steps for a proper installation. Disconnect the boat's battery before starting work.

  1. Safety First: Ensure the engine is off and cool, and disconnect the battery's negative terminal.
  2. Locate the Sensor: Find the ignition sensor inside the distributor housing.
  3. Disconnect Wiring: Carefully unplug the electrical connectors from the old ignition sensor.
  4. Remove Old Sensor: Unscrew the mounting fasteners holding the old sensor in place and remove it from the distributor.
  5. Install New Sensor: Position the new ignition sensor and secure it using the new hardware provided in the kit.
  6. Connect New Wiring: Firmly attach the new lead wire connectors to the new sensor and the corresponding terminals.
  7. Final Checks: Reconnect the battery terminal, start the engine, and check for smooth operation and correct timing.

Troubleshooting & FAQ

How do I confirm this fits my MerCruiser engine?
This kit is designed for MerCruiser V6 and V8 engines (4.3L to 8.2L) from 1981-1997 with Thunderbolt IV & V ignition systems. Please check the 'Compatible Engine Models' and 'Part Number Cross-Reference' tables to ensure it matches your specific model and original part number.

What are the signs of a failing ignition sensor?
Common symptoms include engine misfires, stalling, difficulty starting, intermittent loss of power, or a complete failure to start. If you are experiencing these issues, your ignition sensor may need replacement.

My old part number is 87-91019A2, but the title references 87-91019A3. Will it fit?
Yes. Our kit replaces both OEM numbers, along with several others, as they are functionally interchangeable. You can verify all equivalent part numbers in our cross-reference table to confirm compatibility.

OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
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