SKU: 56375532259

8M0054726 MAP Sensor for Mercruiser Volvo Penta Indmar 4.3L 5.0L 5.7L 6.2L 7.4L 496 8.1L | JLM Marine

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Description

8M0054726 MAP Sensor for Mercruiser Volvo Penta Indmar 4.3L 5.0L 5.7L 6.2L 7.4L 496 8.1L | JLM MarineMAP Sensor for Mercruiser Volvo Penta Indmar 4. 3L 5. 0L 5. 7L 6. 2L 7. 4L 496 8. 1L This MAP (Manifold Absolute Pressure) Sensor is engineered for Mercruiser V6 & V8 MPI engines (4. 3L, 5. 0L, 5. 7L, 6. 2L, 7. 4L, 350 MAG, 496, 8. 1L) from 19982001, as well as Volvo Penta GM V6 & V8 MPI engines from 1998 Up and Indmar marine engines. It delivers accurate manifold pressure readings critical for optimal fuel mapping and engine performance. This

MAP Sensor for Mercruiser Volvo Penta Indmar 4.3L 5.0L 5.7L 6.2L 7.4L 496 8.1L

This MAP (Manifold Absolute Pressure) Sensor is engineered for Mercruiser V6 & V8 MPI engines (4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 350 MAG, 496, 8.1L) from 1998–2001, as well as Volvo Penta GM V6 & V8 MPI engines from 1998-Up and Indmar marine engines. It delivers accurate manifold pressure readings critical for optimal fuel mapping and engine performance.

This aftermarket sensor directly replaces Mercruiser 881731, 861249A1, 8M0054726, Volvo Penta 3861321, and Indmar S556102, ensuring reliable compatibility across multiple marine engine platforms.

  • Direct-fit replacement for MPI fuel-injected V6 and V8 marine engines
  • Compatible with Mercruiser, Volvo Penta, and Indmar engine management systems
  • Essential component for accurate air-fuel ratio control

Part Number Cross-Reference

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

Brand Part Number
Mercruiser 881731, 861249A1, 8M0054726
Volvo Penta 3861321
Indmar S556102

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model Years
Mercruiser V6 & V8 MPI (4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 350 MAG, 496, 8.1L) 1998–2001
Volvo Penta GM V6 & V8 MPI 1998-Up
Indmar 4.3L, 5.0L, 5.7L, 6.2L V6 & V8 Various

Technical Specifications

Specification Value
OEM Number 8M0054726
Sensor Type MAP (Manifold Absolute Pressure) Sensor
Application Marine V6 & V8 MPI Engines
Compatible Brands Mercruiser, Volvo Penta, Indmar

Package Contents

  • 1 × MAP Sensor

Installation Guide

  1. Disconnect the negative battery cable to ensure safety during installation.
  2. Locate the existing MAP sensor on the intake manifold or firewall area of your engine.
  3. Disconnect the electrical connector from the old MAP sensor by pressing the release tab.
  4. Remove any mounting fasteners (typically one or two screws or bolts) securing the sensor.
  5. Carefully remove the old MAP sensor from its mounting location.
  6. Inspect the mounting surface and vacuum port for debris or damage; clean if necessary.
  7. Position the new MAP sensor in the mounting location, aligning it with the vacuum port.
  8. Secure the sensor with the original mounting fasteners, tightening to manufacturer specifications.
  9. Reconnect the electrical connector to the new MAP sensor until it clicks into place.
  10. Verify all connections are secure and that no vacuum lines are kinked or damaged.
  11. Reconnect the negative battery cable.
  12. Start the engine and check for proper operation; verify there are no fault codes or performance issues.

Troubleshooting & FAQ

Q: How do I know if my MAP sensor has failed?
A: Common symptoms include rough idling, poor acceleration, reduced fuel economy, engine stalling, and check engine light activation. A diagnostic scanner will typically show codes related to manifold pressure or fuel trim if the MAP sensor is faulty.

Q: How do I confirm this MAP sensor fits my engine?
A: Cross-reference your original part number with the OEM numbers listed (Mercruiser 881731, 861249A1, 8M0054726; Volvo Penta 3861321; Indmar S556102). Also verify your engine model and year against the compatibility table above.

Q: How often should I replace the MAP sensor?
A: MAP sensors typically last 80,000–100,000 miles or 5–7 years under normal conditions. Replace immediately if you experience performance issues or diagnostic codes indicate sensor failure.

Q: Will this work on carbureted engines?
A: No, this MAP sensor is designed specifically for MPI (Multi-Point Injection) fuel-injected engines. Carbureted engines do not use MAP sensors.

Q: OEM vs. Aftermarket?
A: 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.

Q: How fast do you ship and how much does it cost?
A: 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.

Q: What is your warranty and return policy?
A: 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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 56375532259

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4.2 ★★★★★
Based on 24 reviews
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Product Reviews
P
Verified Purchase
Philip B. Corriveau
Carnegie, US
★★★★★ 5
Solid, powerful, rechargeable
Color: Black
Very impressed with its weight, speed and performance. The dial is great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
C
Verified Purchase
Chief
Pawtucket, US
★★★★★ 4
Very nearly the perfect frother for all your basic frothing & mixing needs
Color: Black
There are a lot of middle-of-the-road frothers out there. I've been through a few of them in my recent search for something that could mix and froth well, without taking up any more outlets in my basement kitchen. Of the three Maestri frothers I've tried so far, this one wins the race by a nose. Most recently, these Maestri frothers come in basically three versions: A single-speed @ 8000 RPM, a two-speed @8000/5500 RPM, and this stepless variable-speed version. Aside from that, the only real difference in recent version pack-outs is which attachments they come with. Look over the reviews of the single-speed version and you'll find that while it can and does froth well, it starts at a single, high speed and gets there fast. This makes it pretty easy to spin liquid right out of most common cups and mugs. There is a two-speed version, but it's harder to find, only comes in one color (Grape Purple), and while it's much better than the Maestri single-speed, it still has a couple of quirks that make this variable-speed version win out. This mixes and froths whole milk, half-and-half, or heavy whipping cream, or just about anything else very well. Like all frothers, it takes a little time to learn its nuances and nail down the technique, this will definitely get you there. The best feature of this is easily the speed control. Turn the knob to turn it on at a low speed that's great to get things started, then turn the knob to crank up the speed just enough to do what you need, whether that's mixing or frothing. The low starting speed makes it easy to keep things under control without undue spilling, and the max speed is more than enough to make quick work of getting your froth on. There are really only two complaints I have with this stepless, variable speed version: - I'd really like to have a Press On / Release Off button in addition to the Speed Control knob. More than one time have I gone to turn this off, only to spin the knob the wrong way and crank the speed up to ludicrous, sloshing liquid on the counter. Being able to turn it Off just by letting go of the button would be quick and easy. This configuration would allow using a preferred speed right from the start, while still allowing speed to be adjusted on-the-fly when needed. - Give it a bigger battery. It would cost mere pennies to give this a 2000mAH+ instead of a 1200mAH battery, and I can't think of any reasonable downside to that. - Give the motor a little more torque. It's fairly easy for the current motor, at any speed, to get bogged down in a thick protein powder mix, or when pressing the frother or other attachment a bit too hard into the bottom or side of the frothing container. A bit more "oomph" would prevent that. I really like the overall design and features of thes Maestri frothers better than many other, cheaper versions. This variable-speed version is pretty great as it is and probably the one I would recommend over the single- or two-speed, for most people. But I often find myself using two hands -- one to hold it steady, and the other to turn it on and tweak the knob to the desired speed(s) -- for a device that should arguably need only one hand to use. Just a couple of minor tweaks as noted above would make this the overall best frother of its type that I've used.
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Reviewed in the United States on May 23, 2025
D
Verified Purchase
D. Smith
Fort Morgan, US
★★★★★ 5
Hands down, the BEST handheld frother I've ever used!
Color: Black
Hands down, the BEST handheld frother I've ever used! I got the black one, but any color will have the same results. Over the past 12 years or so, I've used so many different handheld frothers and they've ALL fallen short of expectations for quality, longevity, power, features, and usability. I've used everything from cheap, $15 models to $50+ models and everything in-between. Some with fancy attachments for various types of mixing, frothing, beating, whipping, etc. Some with rechargeable batteries, some without. Some AC powered, some with fixed whisks, some with detachable/replaceable whisks, some with stands, etc. NONE have been spectacular. Most broke within 6 months and got tossed. ALL were major disappointments in the end, including the "revered" Zulay models of which I tried several. I finally found this Maestri House branded, variable speed frother with detachable / replaceable whisks and got one to try. I was literally on Cloud Nine the first time I turned it on. Like, WOW! Not only was it FAST on the highest speed, but it was powerful enough to churn right through milk, eggs, cream, etc, without bogging down like many others. This thing makes milk froth like a milkshake and Matcha Lattes like nothing else I've ever experienced. I used to have to sift my Matcha, then whisk it in hot water, then froth milk and then blend them together to make the perfect latte. and if the milk was cold (my preference), pre-whisking in hot water was a must to avoid lumps. However, with THIS frother? I literally pour my milk into a tall tumbler, drop in un-sifted Matcha powder, and spin up the Maestri House frother at first on a medium low speed to get it mixed, then jump straight to the highest speed to really whip that milk and match up. After about 30-45 seconds, I've got the thickest, richest, smoothest, most aerated latte around. And NO LUMPS at all!!! What a time and dish saver! And cleaning? I just run it under hot running water to get the shaft cleaned and then spin it up in a dish with hot running water for a few moments, then spin it on high for a few seconds in the air to dry it off instantly. Now, I'll be honest here, too. The specs say it can go months on a charge, using it for a couple minutes a couple times daily. Well, I guess it could do that and still spin. But I use it FULL SPEED, churning hard for at least a minute a couple times per day. After about 2 weeks, I can start to notice a speed reduction so I just plug it back in on the charger. All things considered, this is still better than all the other handheld frothers I've used over the years. After using the heck out of this thing for the past 7 months, I've even decided to start selling these in our Japanese gift shop. The manufacturer is has been very responsive both in customer support (I called them about an issue I thought I was having, and they called me back with a couple hours even though I didn't leave voicemail when they didn't answer right away) and in reseller support. I have to give these guys an A+ for responsiveness and quick resolution when problems might arise. HIGHLY recommended!!
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Reviewed in the United States on October 17, 2025
H
Verified Purchase
Hawaii Keith
New York, US
★★★★★ 5
Great Addition!
Color: Black
Why did you pick this product vs others?: I just started a powdered drink routine recently and was having a difficult time mixing it with water. I would consistently end up with small nuggets of mix making it unenjoyable to drink. I knew I needed a mixer and was glad I found this device when I did. It works perfectly! I like the fact that it comes with its own stand and included two mixing heads. It is solid, well-designed, and you can feel the quality when you pick it up. The variable speed of the mixer is perfect for ensuring that everything is blended well. I haven’t used it to “froth” anything yet, at least not on purpose, but I accidentally found out that it can do that well. This is a great addition to our kitchen and is very easy to wash after use. So far…no issues. Highly recommend for those of you looking for the right tool to make sure those protein mixes aren’t full of unmixed nuggets.  
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Reviewed in the United States on June 21, 2025
S
Verified Purchase
Suzi blue
Phoenix, US
★★★★★ 4
Low foam
Color: Black
Love this frother. It is great quality and the turn speed is amazing. My only issue is this. It comes w 2 wands and they are both singles. The single is great for stirring things up. It does not make a lot of froth and for some things it’s perfect but sometimes I like a lot of froth and I wish it either came w a single and a double or you could purchase a double separately to intermix. I don’t want to buy a whole other unit just for the double. I wrote to them bc the double frother they sell doesn’t look as good as this one but sometimes a girl needs a lot of foam and sometimes th stirring is perfect.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026

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