Air Charge Temp Sensor 805223T – MerCruiser V6/V8 MPI

Air Charge Temp Sensor 805223T – MerCruiser V6/V8 MPI

Vendor: JLM Marine
Availability: In Stock
Product Type: Sensor
$55.77
$55.77
Subtotal: $55.77

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Air Charge Temp Sensor 805223T – MerCruiser V6/V8 MPI

Air Charge Temp Sensor 805223T – MerCruiser V6/V8 MPI

$55.77
Описание

How to Match This Part

This aftermarket air charge temperature sensor (IAT / ACT) replaces Mercury MerCruiser / Quicksilver 805223T. It is a thermistor-style intake-air sensor that reports incoming air temperature to the engine control module so fuel delivery stays matched to load and air density on MPI sterndrive and inboard engines.

Match this part in this order:
1. OEM number on the removed sensor — 805223T (also commonly cross-matched to Sierra 18-7702 and Volvo Penta / OMC 3854527)
2. Engine family — MerCruiser V-6 and V-8 MPI (350, 454, 496, and 502 CID), plus Volvo Penta GM EFI/MPI applications that call for 3854527
3. Physical form — threaded flame-arrestor / intake-air sensor body with a molded harness connector

Compare the thread, probe tip, and connector shape with the product images before ordering. If your original sensor carries a different OEM number or a different connector layout, do not use this part — coolant-temperature senders and other MerCruiser IAT numbers are separate listings.

Part Number Cross-Reference

Use these verified numbers to confirm you have the correct air charge temperature sensor. Brand names and OEM numbers are for identification only.

Type Brand Part Number Notes
OEM Mercury MerCruiser / Quicksilver 805223T Primary reference (SENSOR ASSY — IAT)
OEM Volvo Penta 3854527 Interchange OEM number for the same IAT family
OEM OMC Stern Drive 3854527 Interchange OEM number
Aftermarket Sierra Marine 18-7702 Direct cross-reference
Aftermarket Mallory Marine 9-42406 Direct cross-reference

This is an aftermarket part manufactured by JLM Marine. It is not sold as a genuine Mercury, MerCruiser, Quicksilver, Volvo Penta, or OMC component.

Compatible Engine Models

Confirm your engine before ordering. Serial location guide: Mercury Parts Diagrams. Always match the OEM number and physical form of the sensor you remove.

Brand Engine Model Displacement / Notes Application
MerCruiser V-6 MPI GM V-6 MPI (incl. 4.3L families that use 805223T) Replaces 805223T
MerCruiser 350 MPI 350 CID V-8 MPI Replaces 805223T
MerCruiser 454 MPI 454 CID V-8 MPI Replaces 805223T
MerCruiser 496 MPI 496 CID V-8 MPI Replaces 805223T
MerCruiser 502 MPI 502 CID V-8 MPI Replaces 805223T
Volvo Penta GM V-6 / V-8 EFI & MPI Applications that call for OEM 3854527 Replaces 3854527

Confirm the number stamped on your removed sensor and compare the connector and thread with the product images before purchase. Do not rely on horsepower or model-year lists alone.

Technical Specifications

Specification Value
Part type Air Charge Temperature Sensor (IAT / ACT)
Primary OEM replaced Mercury MerCruiser / Quicksilver 805223T
Sensor function Thermistor input of intake-air temperature to the ECM for fuel delivery control
Mounting location Flame-arrestor / intake-air path (SENSOR ASSY — IAT)
Housing form Threaded sensor body with molded electrical connector
Engine systems MerCruiser V-6 & V-8 MPI (350 / 454 / 496 / 502 CID); Volvo Penta GM EFI/MPI using 3854527

Installation Guide

  1. 1 Disconnect the battery negative cable and let the engine cool. Locate the existing IAT sensor at the flame arrestor or intake-air path.
  2. 2 Unplug the harness connector from the old sensor. Note connector orientation so the new lead is not strained against the flame arrestor or throttle linkage.
  3. 3 Unscrew the old sensor from its mounting boss. Compare old and new units side by side: thread, probe tip, and connector must match.
  4. 4 Thread the new sensor in by hand, then tighten to the torque specified in your MerCruiser or Volvo Penta service manual. Do not overtighten into aluminum bosses.
  5. 5 Reconnect the harness until it locks, reconnect the battery, and clear any stored IAT-related fault codes with the manufacturer diagnostic tool if required.
  6. 6 Start the engine, let it reach normal temperature, and confirm smooth idle and throttle response with no new intake-air temperature codes.

Note: Professional installation is recommended for EFI / MPI intake-air sensors.

Troubleshooting & FAQ

How do I confirm this fits my MerCruiser or Volvo Penta? +

Read the number on your existing sensor first. If it is 805223T, Sierra 18-7702, or Volvo Penta / OMC 3854527, this is the correct replacement for the MerCruiser V-6 / V-8 MPI and Volvo GM EFI/MPI applications listed above. Compare the thread and connector with the product images.

Is this the same as a coolant temperature sender? +

No. This listing is an intake air charge temperature (IAT) sensor for the flame-arrestor / intake path. Coolant-temperature senders and gauge senders use different part numbers and mounting locations — order the listing that matches the number on your removed sensor.

What symptoms point to a failing air charge temperature sensor? +

Common signs include hard starting when cold or hot, rich or lean running, rough idle, hesitation under load, and ECM fault codes related to intake air temperature. Confirm the fault by testing before replacing the sensor — wiring and connector problems can produce the same symptoms.

Is this an OEM or aftermarket part? +

This is an aftermarket replacement manufactured by JLM Marine. It is not a genuine Mercury, MerCruiser, Quicksilver, Volvo Penta, or OMC part. OEM and aftermarket numbers are listed only for cross-matching.

Important Notes

  • Match the OEM number and the physical form of your original sensor before ordering. A different connector or thread means a different part.
  • This listing is for MerCruiser V-6 & V-8 MPI applications that use 805223T and Volvo Penta GM EFI/MPI applications that use 3854527 — not for unrelated coolant senders or outboard sensors.
  • This is an aftermarket part. Brand names and part numbers are for reference only.
  • Professional installation is recommended for EFI / MPI intake-air sensors.

Why Choose JLM MARINE?

  • Precision Fit: Cross-referenced to Mercury MerCruiser / Quicksilver 805223T for the MerCruiser MPI and Volvo Penta applications listed above.
  • Quality Control: Each batch is inspected for dimensional consistency and workmanship.
  • Direct from Manufacturer: Aftermarket marine sensors engineered for reliable intake-air temperature feedback on MerCruiser and Volvo Penta EFI / MPI systems.
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О компании JLM Marine

Основанная в 2002 году, компания JLM Marine зарекомендовала себя как специализированный производитель высококачественных морских деталей, базирующийся в Китае. Наша приверженность совершенству в производстве заслужила нам доверие ведущих мировых морских брендов.

Как прямой поставщик, мы обходим посредников, что позволяет нам предлагать конкурентоспособные цены без ущерба качеству. Такой подход не только поддерживает экономическую эффективность, но и гарантирует, что наши клиенты получают наилучшую ценность напрямую от источника.

Мы рады расширить свое присутствие через розничные каналы, предлагая наш опыт и приверженность качеству непосредственно владельцам и любителям лодок по всему миру.

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