SKU: 86983539666

8M0011987 Camshaft Position Sensor for Mercury Mariner Verado | JLM Marine

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Description

8M0011987 Camshaft Position Sensor for Mercury Mariner Verado | JLM Marine8M0011987 Camshaft Position Sensor for Mercury Mariner Verado Outboards This camshaft position sensor is engineered to fit Mercury Verado and Mariner outboard engines from 135HP to 400HP, as well as MerCruiser Sterndrive Gas Engines 9. 0L 552 CID V8. It ensures precise camshaft timing detection for optimal engine performance and reliable ignition control across a wide range of high performance marine applications. This sensor directly replaces OEM

8M0011987 Camshaft Position Sensor for Mercury Mariner Verado Outboards

This camshaft position sensor is engineered to fit Mercury Verado and Mariner outboard engines from 135HP to 400HP, as well as MerCruiser Sterndrive Gas Engines 9.0L 552 CID V8. It ensures precise camshaft timing detection for optimal engine performance and reliable ignition control across a wide range of high-performance marine applications.

This sensor directly replaces OEM part numbers 880609 and 8M0011987, providing a reliable aftermarket solution for maintaining your engine's camshaft position monitoring system.

  • Direct replacement for Mercury Mariner part numbers 880609 and 8M0011987
  • Compatible with Mercury Verado, Mariner outboards (135HP–400HP), and MerCruiser 9.0L V8 sterndrives
  • Ensures accurate camshaft timing detection for optimal engine performance

Part Number Cross-Reference

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

Brand Part Number
Mercury Mariner 880609
Mercury Mariner 8M0011987

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
Mercury Verado Outboards 135HP 150HP 175HP 225HP 250HP 275HP 300HP 350HP 400HP
Mercury Mariner Outboards 135HP 150HP 175HP 225HP 250HP 275HP 300HP 350HP 400HP
MerCruiser Sterndrive Gas Engines 9.0L 552 CID V8 N/A

Technical Specifications

Specification Value
OEM Part Number 8M0011987, 880609
Product Type Camshaft Position Sensor
Application Mercury Verado, Mariner Outboards, MerCruiser Sterndrive
Compatible Engine Range 135HP – 400HP Outboards; 9.0L V8 Sterndrive

Package Contents

Your package includes:

  • 1× Camshaft Position Sensor

Installation Guide

  1. Disconnect the battery: Always disconnect the negative battery terminal before beginning any electrical work to prevent accidental shorts or injury.
  2. Locate the camshaft position sensor: Consult your engine's service manual or parts diagram to identify the exact location of the sensor on your specific model.
  3. Disconnect the electrical connector: Carefully unplug the wiring harness connector from the old sensor. Press any locking tabs if present.
  4. Remove the mounting hardware: Unscrew the bolt(s) securing the sensor to the engine block or cylinder head using the appropriate socket or wrench.
  5. Extract the old sensor: Gently pull the sensor out of its housing. Note the orientation and any O-rings or seals that may need replacement.
  6. Inspect the mounting surface: Clean any debris, oil residue, or old gasket material from the sensor mounting area to ensure a proper seal.
  7. Install the new sensor: Insert the new camshaft position sensor into the mounting hole, ensuring correct alignment and orientation.
  8. Secure the sensor: Hand-tighten the mounting bolt(s) first, then torque to manufacturer specifications (typically 8–12 Nm / 71–106 in-lbs, but verify in your service manual).
  9. Reconnect the electrical connector: Plug the wiring harness connector firmly onto the new sensor until you hear or feel it click into place.
  10. Reconnect the battery: Reattach the negative battery terminal and ensure all connections are secure.
  11. Clear any diagnostic codes: Use a marine diagnostic tool to clear any stored fault codes related to the camshaft position sensor.
  12. Test the engine: Start the engine and verify smooth operation, checking for warning lights or fault codes. Confirm proper idle and throttle response.

Troubleshooting & FAQ

Q: How do I confirm this camshaft position sensor fits my engine?
A: Cross-reference your original part number (880609 or 8M0011987) with our compatibility table. Verify your engine model, horsepower, and year against the fitment chart above. If you're unsure, consult your engine's parts diagram or contact our support team with your engine serial number.

Q: What are the signs of a failing camshaft position sensor?
A: Common symptoms include rough idling, engine stalling, difficulty starting, misfires, reduced power, hesitation during acceleration, and illuminated warning lights or fault codes (often related to ignition timing or sensor circuit faults).

Q: How often should I replace the camshaft position sensor?
A: Camshaft position sensors typically do not have a scheduled replacement interval; they should be replaced when they fail or show signs of malfunction. Regular diagnostic scans and monitoring engine performance can help detect sensor issues early.

Q: Can I use this sensor on both Verado and standard Mariner outboards?
A: Yes, this sensor is designed to fit Mercury Verado and Mariner outboards from 135HP to 400HP, as well as MerCruiser 9.0L V8 sterndrive engines. Always verify compatibility with your specific engine model and serial number before installation.

Q: Will installation of this sensor require recalibration or programming?
A: In most cases, no special programming is required. After installation, clear any stored fault codes with a diagnostic tool and allow the ECU to relearn sensor parameters during normal operation. Consult your service manual for model-specific procedures.

Q: Is this an OEM part or an aftermarket replacement?
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: 86983539666

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4.4 ★★★★★
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Product Reviews
K
Kenneth
Natrona Heights, US
★★★★★ 5
Works great, keeps the light out of my eyes and easy to put together
Size: 1 Panel, Size: 1 Panel
I got this room divider in and it works great. It’s really easy to put together you don’t even need tools. I really like that it’s not see through, it’s not a black out curtain but it keeps light out pretty good. I absolutely hate my bedroom layout there’s no bathroom door. My girlfriend and I have different work schedules so I’m trying to sleep while she’s getting ready for work and the light shines right in my eyes. This divider keeps the light out of my eyes and that’s exactly what I was hunting for. I also like that you can adjust the length. I took one of the bars out to make it a little shorter and it worked great. I would recommend this room divider.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 26, 2026
A
Amazon Customer
Massapequa, US
★★★★★ 5
Versatile Room Divider With Easy Assembly and Strong Coverage
Size: 3 Panel 12FT W
I picked up this Siebwin 3-panel folding room divider mainly for privacy and room separation, and overall it works very well. Assembly is very straightforward, and the divider can be set up, taken apart, and stored without much effort. The fabric quality feels good, and the frame construction is stronger and more stable than expected. The support tubes especially feel well built and help keep the divider standing securely. One feature I really liked is the flexibility of the design. The panels can be used together as a complete divider or separated depending on the setup and available space. That makes it much more versatile for different room layouts or temporary privacy needs. The coverage is also very good, and the size matches the manufacturer’s description accurately. The fabric blocks light and background visibility well enough to provide solid privacy without feeling overly heavy. The wider feet also help improve stability compared to thinner folding dividers. Another positive detail is that everything arrived complete with no missing parts or damaged pieces, which made assembly much easier and faster. Compared to cheaper privacy screens, this one feels more durable and easier to customize depending on the situation. In terms of value for the money, it feels like a very practical and worthwhile purchase considering the size, flexibility, and build quality. Overall, a versatile and well-built room divider with easy assembly, strong privacy coverage, stable construction, complete included parts, flexible panel configuration, and excellent everyday functionality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
F
Fred
Phoenix, US
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one. The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy. Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex. The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one. The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026
C
Computer
Whiting, US
★★★★★ 4
Easy to assemble, does the job, material is shiny nylon and shows creases, minor defects, sloppy
Size: 3 Panel 12FT W, Size: 3 Panel 12FT W
The Siebwin room divider is a good idea, and for the price, it mostly delivers on the intended functionality. I ordered the 12 foot, 3-panel version mainly to hide an unfinished basement storage area that had become an eyesore. It works well for that purpose and gives the space a cleaner appearance without spending the kind of money that more decorative dividers or custom partitions cost. If you need something temporary, portable, or mainly functional, this is a viable option. There are a few limitations that became obvious during setup and use. The first thing I noticed was that the weld quality on some of the metal poles is fairly sloppy. Once the cover is installed, you do not really see it, but up close, it does not look especially refined or professional. The blackout material also is not a matte canvas style fabric as I expected. It has more of a shiny nylon appearance, and the creases are fairly visible. Being that it’s more of a nylon, I’d be hesitant to try steaming it to remove the creases. However, the creases do not matter if you are using it in a basement, dorm, or shared room, but for photography, video work, or a professional office setting, the appearance could be disappointing. The fabric is thick enough, though. It blocks visibility well enough, but strong light behind it still shows through to some extent, nothing deal-breaking. Also, my fabric appeared to be slightly defective. The hook and loop strip on one of the bottom sections was off-center and couldn't be totally attached because it was lined up with one of the legs. I originally hoped to use this as a video backdrop, but I will probably end up replacing the fabric with a proper green screen or canvas material while continuing to use the frame itself. For now, it does a good job of covering my basement junk. Assembly was actually easier than I expected and took roughly 15 to 20 minutes. The longer vertical poles are tethered together similarly to tent poles, which made setup straightforward and fairly intuitive. The shorter horizontal pieces slide and snap together to the top and bottom of the vertical assembly. After each section is assembled, the divider panels connect together with metal plates and two knurled screws (at the top and bottom), so no tools are really required. A few screws were difficult to start because paint had gotten into the threads, but once they caught, they tightened down normally. The feet install with similar knurled fasteners and help keep the divider reasonably stable. One thing to watch for during setup is the fabric orientation. There is one arrow indicator in the middle of the fabric to indicate up. However, if you need another indicator, the smaller hook and loop strip goes on the bottom while the longer strip goes on top. I realized mine was upside down right before finishing and had to redo it. I wasn't difficult to redo, despite the defect in mine. The overall design is practical and easy to move around. I do like that the panels can fold and bend into different shapes depending on the space. The widened feet help stability, although when trying to stretch the fabric tight, I noticed the poles sometimes wanted to overlap slightly at the joints. Tightening everything helped somewhat, but it still happened occasionally. The divider feels adequate for normal indoor use, though I would not expect premium durability or luxury-level fit and finish at this price point. The entire device can also be easily disabled and stored in a tote if you need it completely out of the way. It comes with assembly instructions, but even if you didn’t have them, it’s easy to build without them (save a mistake or two). In terms of value, I think the Siebwin divider mostly matches its price. Around $100 gets you a large freestanding partition with decent usability and easy assembly, but there are compromises in materials, appearance, and refinement. The defects are also off-putting, but hopefully you won't have them. Higher-end room dividers can easily cost two or three times more, so some of the tradeoffs are expected. I also noticed cheaper alternatives online, but based on the quality here, I suspect those would probably have even more issues. For practical home use, temporary privacy, hiding storage areas, or separating shared spaces, this is a good option as long as expectations stay realistic.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
T
Trendy Tales
Charlottesville, US
★★★★★ 3
Works well but takes up more space than expected
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
This room divider does the job for creating a little extra privacy and was easy enough to set up. The panels feel decent quality and the wider feet help keep it more stable than some cheaper screens I’ve tried. My only issue is that it takes up a bit more room than I expected, especially with the feet sticking out. It’s still portable and folds away nicely, but definitely measure your space first. Overall it works well for separating a room or blocking off an area temporarily. i wish it came in other colors
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026

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