My Account
Shopping Cart

Quicksilver 805223T Intake Air Temperature IAT MAT Sensor Assembly

Manufacturer

Quicksilver

<h3>Quicksilver: The Marine Enthusiast&apos;s Trusted OEM Brand</h3><p>For boaters who refuse to compromise on quality, <strong>Quicksilver</strong> has been the benchmark for marine parts, accessories, and engine care products since 1950. Based in Fond du Lac, Wisconsin, Quicksilver operates as the parts and accessories brand of Mercury Marine — and that heritage is central to everything it makes. As the only marine aftermarket brand manufactured and recommended by an original-equipment manufacturer, Quicksilver brings factory-level engineering directly to boat owners, professional technicians, and weekend warriors alike.</p><p>What sets Quicksilver apart from generic aftermarket suppliers is its direct lineage to the engineers who designed the engines in the first place. Every component is engineered, tested, and manufactured with the same exacting standards as the original equipment it replaces. The result is a product line that fits right the first time and delivers the reliability boaters depend on — whether they&apos;re navigating calm inland lakes or pushing through demanding saltwater conditions.</p><p>Quicksilver&apos;s catalog spans more than 40,000 parts across 12 product lines, covering outboard and sterndrive engines from Mercury, Mariner, Yamaha, Honda, Evinrude, Johnson, Suzuki, and more. Among the most critical components in that lineup are Quicksilver Fuel Pumps, which are built to deliver factory fit and consistent fuel delivery across a wide range of outboard applications. Reliable fuel delivery is the foundation of engine performance, and Quicksilver&apos;s fuel system components are engineered to handle the demanding conditions of marine use — including compatibility with current fuel formulations.</p><p>Beyond fuel systems, Quicksilver is a go-to source for Propeller Parts &amp; Accessories that help boaters maintain and optimize their propulsion systems. From hub kits that protect both prop and gearcase to installation hardware and prop tools, these components are designed to the same tolerances as the drives they support. Proper propeller maintenance is one of the most impactful things a boat owner can do for performance, efficiency, and engine longevity — and Quicksilver makes that job straightforward.</p><p>The brand&apos;s commitment extends across lubricants, impellers, thermostats, anodes, fuel filters, oil filters, maintenance kits, and complete service packages — all engineered for the marine environment and tested to meet or exceed the standards of major engine manufacturers. Whether you&apos;re performing routine seasonal maintenance or tackling a more involved repair, Quicksilver provides the parts that restore your engine to peak operating condition.</p><ul style="list-style:disc"><li>OEM-backed engineering from Mercury Marine</li><li>Compatible with Mercury, Yamaha, Honda, Evinrude, Johnson, Suzuki, and Mariner engines</li><li>Over 40,000 parts spanning 12 product lines</li><li>Formulated and tested for freshwater and saltwater environments</li><li>Trusted by DIY boaters and professional marine technicians since 1950</li></ul><p>When reliability on the water is non-negotiable, Quicksilver delivers the peace of mind that only a true OEM-backed brand can provide.</p>

Part Number

805223T
09/12/2036 5:43 AM
Sale Price

$136.13

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Quicksilver 805223T is an OEM Intake Air Temperature (IAT) Sensor Assembly — also commonly referred to as a MAT (Manifold Air Temperature) sensor or Air Charge Temperature Sensor (ACTS) — designed for MerCruiser inboard and sterndrive engines. This is a genuine Quicksilver replacement part manufactured to Mercury Marine's original equipment specifications.

This thermistor-type sensor monitors the temperature of the incoming air stream and relays that data to the engine control computer (ECM), allowing the system to make precise fuel delivery and ignition timing adjustments for optimal engine performance. It can be installed in the intake manifold on EFI (Electronic Fuel Injection) systems or in the air cleaner assembly, depending on engine configuration.

Key Features:

  • OEM Quicksilver replacement part — built to Mercury Marine factory standards
  • Thermistor-type sensor provides accurate intake air temperature readings to the ECM
  • Compatible with MerCruiser V6 and V8 EFI engines
  • Also cross-references Volvo Penta part number 3854527 and Sierra part number 18-7702
  • Sold individually (each)

The Quicksilver 805223T is the correct OEM solution for restoring proper engine management function when your existing IAT/MAT sensor has failed or is reading inaccurately. Choosing a genuine Quicksilver part ensures proper fit and reliable performance backed by Mercury Marine's engineering standards.

Overall great experience

Site use was easy, and product shipped promptly after ordering. Price was the best I could find, would use this business again.

easy navigation

Easy

My initial review was 1 star because I ordered a Thule rooftop cargo box, but cancelled the order after Autoplicity called me about collecting extra money to ship the item after their website did not charge me enough for shipping. After my initial review Autoplicity offered to ship the item totally free since the issue was a flaw in their website. This was unexpected, above and beyond in my opinion. I have yet to receive the item but commend Autoplicity's customer service

Very easy to navigate website. I recived my order quick and it was also the cheapest online.

Awesome price! Shipping could be faster, but it was fast enough. Will deff buy again.

Quick and easy

Fast

Great experience. Good service. Reasonable prices.

So far so good!

Thank you! You were the cheapest and your service rocked! Got my item in less than a week.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy