Knock Sensor 806612T – MerCruiser GM V8 305/350/377

Knock Sensor 806612T – MerCruiser GM V8 305/350/377

Vendor: JLM Marine
Availability: In Stock
Product Type: Sensor
$96.99
$96.99
Subtotal: $96.99

Envío gratis

Envío estándar gratuito en todos los pedidos inferiores a 1 kg.

Devoluciones sin preocupaciones

Aprende más.
Knock Sensor 806612T – MerCruiser GM V8 305/350/377

Knock Sensor 806612T – MerCruiser GM V8 305/350/377

$96.99
Descripción

How to Match This Part

This aftermarket knock (detonation) sensor replaces MerCruiser / Mercury Quicksilver 806612T. It monitors engine vibration for knock and sends a signal so the ECM can retard ignition timing and protect the engine.

Match this part in this order:
1. OEM number on the sensor you are removing or in your parts catalog — 806612T
2. Engine family — MerCruiser MCM / MIE GM V8 marine engines at 305, 350, or 377 CID (5.0L / 5.7L / 6.2L class)
3. Aftermarket cross — Sierra 18-7677 or Mallory 9-33503 if that is what your catalog lists

Confirm the OEM number and engine displacement against your service documentation before ordering. Different MerCruiser ignition / ECM setups can use other knock-sensor numbers.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers. 806612T is the primary MerCruiser reference for this listing.

Type Brand Part Number Notes
Primary OEM Reference Mercury / MerCruiser 806612T Quicksilver knock sensor
Related OEM Volvo Penta 3850357, 22024631 Catalog cross for the same sensor family
Related OEM OMC 3850357 Catalog cross for the same sensor family
Related OEM Pleasurecraft (PCM) R020027 Catalog cross for the same sensor family
Aftermarket Sierra Marine 18-7677 Direct replacement cross
Aftermarket Mallory Marine 9-33503 Direct replacement cross

Part numbers are listed for identification only. This is an aftermarket part manufactured by JLM Marine and is not sold as a genuine Mercury / MerCruiser component.

Compatible Engines

Confirm the MerCruiser engine identification plate and that the removed sensor is numbered 806612T (or a listed cross above). Match by OEM number and GM V8 displacement — do not rely on appearance alone.

Brand Application
MerCruiser (MCM / MIE) GM V8 305 CID (5.0L class)
MerCruiser (MCM / MIE) GM V8 350 CID (5.7L class)
MerCruiser (MCM / MIE) GM V8 377 CID (6.2L class)

Important: This listing is for the 806612T knock-sensor family on the GM V8 displacements above. Other MerCruiser knock sensors exist for different engine families and ECM configurations — verify the OEM number on your engine before ordering.

Technical Specifications

Specification Value
Part type Knock / detonation sensor
Primary OEM number 806612T
Engine family MerCruiser MCM / MIE GM V8
Displacements 305, 350 & 377 CID
Aftermarket crosses Sierra 18-7677; Mallory 9-33503
Function Detects knock / detonation and signals the ECM for timing retard

Installation Guide

1

Disconnect the battery. Locate the existing knock sensor on the engine block and note harness routing before unplugging.

2

Remove the old sensor carefully. Keep the mounting threads clean and free of debris so the new sensor seats correctly.

3

Install the new sensor to the torque specified in your MerCruiser service manual for this application. Over- or under-tightening can affect knock detection.

4

Reconnect the harness until fully seated. Route the lead clear of hot manifolds and moving belts.

5

Reconnect the battery. Clear any stored knock-sensor codes if present, then run the engine and confirm normal operation under load.

Note: Professional installation is recommended to ensure safety and optimal performance.

Troubleshooting & FAQ

Is this an OEM or aftermarket part?+

This is an aftermarket JLM Marine replacement matched to MerCruiser 806612T (and the listed crosses). It is not a genuine Mercury / MerCruiser part.

What engines does 806612T fit?+

Catalog fitment is MerCruiser MCM / MIE GM V8 engines at 305, 350, and 377 CID. Always confirm the OEM number on your engine — other knock sensors are used on different MerCruiser families.

What symptoms point to a failed knock sensor?+

Common signs include audible knock or ping under load, reduced power, and knock-sensor circuit fault codes. Inspect the harness and grounds before replacing the sensor.

Why Choose JLM MARINE?

  • Precision Fit: Cross-reference matched to MerCruiser 806612T knock-sensor applications on GM V8 305 / 350 / 377 CID marine engines.
  • Quality Control: Each batch is inspected for dimensional consistency and workmanship.
  • Direct from Manufacturer: Aftermarket marine parts engineered for reliable ignition-knock sensing service.
Envío

Podemos enviar a prácticamente cualquier dirección del mundo con envío gratuito disponible para la mayoría de las regiones.

Para nuestros clientes típicos de EE. UU. y Canadá , nuestros plazos de envío son los siguientes:

  • Amazon FBA : los pedidos se entregarán dentro de 1-5 días hábiles después de realizar el pedido (durante ciertos períodos especiales como promociones importantes, Navidad, etc., el tiempo de entrega de Amazon FBA puede verse afectado).
  • Envío al almacén de EE. UU .: los pedidos se entregarán dentro de los 7 días posteriores a la realización del pedido.
  • Envío al almacén de China : los pedidos se entregarán aproximadamente 12 días después de realizar el pedido.

Al realizar un pedido, estimaremos las fechas de envío y entrega según la disponibilidad de sus artículos y las opciones de envío que elija. Dependiendo del proveedor de envío que elija, las fechas de envío estimadas podrían aparecer en la página de presupuestos de envío.

Tenga en cuenta también que las tarifas de envío de muchos de los artículos que vendemos se basan en el peso. Puede consultar el peso de cada artículo en su página de detalles. Para reflejar las políticas de las empresas de envío que utilizamos, todos los pesos se redondearán a la libra superior.

Acerca de JLM Marine

Fundada en 2002, JLM Marine se ha consolidado como un fabricante dedicado de piezas marinas de alta calidad, con sede en China. Nuestro compromiso con la excelencia en la fabricación nos ha ganado la confianza de las principales marcas marinas a nivel mundial.

Como proveedor directo, evitamos intermediarios, lo que nos permite ofrecer precios competitivos sin comprometer la calidad. Este enfoque no solo promueve la rentabilidad, sino que también garantiza que nuestros clientes reciban el mejor valor directamente del proveedor.

Estamos entusiasmados de ampliar nuestro alcance a través de canales minoristas, llevando nuestra experiencia y compromiso con la calidad directamente a los propietarios de embarcaciones y entusiastas de todo el mundo.

Parts Finder

Use our Parts Finder to quickly locate the correct parts for your engine. Search by Make, HP, Stroke, Model, Year, and SN. Select only the fields available — you don’t need to fill all options (e.g., leave Year blank if not applicable).

Our database is currently being updated and expanded. More models, including Yamaha, Mercury, and Suzuki, are being verified and uploaded.
Search
Add to garage

Productos relacionados

 
 
 
 
 
 

Productos vistos recientemente