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Camshaft Position Sensor 880609 – Fits Mercury Verado
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How to Match This Part
This aftermarket camshaft position sensor replaces Mercury Marine 880609, which Mercury later listed as 8M0011987 and then as 8M0233140. It mounts in the cylinder head / camshaft cover group and reports camshaft angle to the engine control module so ignition and injection timing stay synchronised on the Mercury and Mariner applications listed below.
Match this part in this order:
1. Number on the sensor you remove — 880609, 8M0011987, or 8M0233140
2. Engine serial number — Mercury / Mariner outboards: plate on the transom bracket or cowl; Mercury Racing QC4V: engine identification plate
3. Model family and horsepower against the compatibility table, then compare the body shape with the product images
Identify the sensor by form as well as by number. The unit is a one-piece moulded black plastic body with a cylindrical probe barrel, a pre-fitted brown O-ring on the barrel, a single flat mounting ear with a metal bushing for one retaining bolt, and a side-facing sealed electrical connector with a locking tab. If your original sensor looks different or carries an unrelated Mercury number, do not use this part even if the horsepower overlaps.
Part Number Cross-Reference
Use these verified numbers to confirm you have the correct camshaft position sensor. Brand names and OEM numbers are for identification only.
| Type | Brand | Part Number | Notes |
|---|---|---|---|
| OEM | Mercury Marine | 880609 | Original equipment sensor assembly |
| OEM | Mercury Marine | 8M0011987 | Supersedes 880609; later superseded by 8M0233140 |
| OEM | Mercury Marine | 8M0233140 | Current catalogue number (functional replacement) |
This is an aftermarket part manufactured by JLM Marine. It is not sold as a genuine Mercury Marine or Mariner component.
Compatible Engine Models
Confirm your engine model and serial number in the table below. Mercury changed this sensor number during production, so the serial range and the number on the removed sensor are the decisive checks. For Mercury owners: Mercury Serial Number Guide and Mercury Parts Diagrams. Mariner-badged engines that use the same Mercury OEM number are covered the same way.
| Engine Family | HP | Serial Number Range | Notes |
|---|---|---|---|
| EFI FourStroke outboard | 75, 80, 90, 100, 115 | 0P459572 THRU 2B094995; 1B366823 THRU 2B094995 (model-specific) | Via 880609 catalog applications |
| Verado 4-Stroke, 4 Cylinder | 135, 150, 175, 200 | 0P419487 and up (see model serial breaks) | Via 880609 catalog applications |
| Verado 4-Stroke, 6 Cylinder | 200, 225, 250, 275 | 0P409357 THRU 1B517433; 0T980000 THRU 1B226999 (model breaks) | Via 880609 catalog applications |
| Verado 4-Stroke, 6 Cylinder | 200, 225, 250, 275, 300 | 0P520553 THRU 2B144122; 1B517434 THRU 2B144122; 2B144123 and up | Via 8M0011987 catalog applications |
| Pro Verado 4-Stroke, 6 Cylinder | 200, 250, 300 | 2B034840 and up (200); 1B830170 and up (250/300); later 2B144123 and up | Via 8M0011987 catalog applications |
| Verado / Pro Verado 4-Stroke, 6 Cylinder | 350, 400 | 2B141124 and up (350 Pro / 400); 2B141617 and up (350) | Via 8M0011987 / current 8M0233140 applications |
| 350SCi Verado | 350 | 1B716557 THRU 2B143542 | Via 8M0011987 catalog application |
| Mercury Racing QC4V | 1100, 1350, 1650 | 0M965965 and up (1100); 0M965309 and up (1350 / 1650) | Via 8M0011987 / 8M0233140 applications |
If your serial number sits near a range boundary, confirm the number stamped on the sensor you are removing before ordering.
Technical Specifications
| Specification | Value |
|---|---|
| Part type | Camshaft position sensor assembly |
| Primary OEM number replaced | 880609 |
| Superseded / current numbers covered | 8M0011987, 8M0233140 |
| Engine brands | Mercury; Mariner where the same OEM number applies |
| Mounting | Single-bolt flange with metal bushing; inserts into cylinder head or camshaft cover |
| Sealing | O-ring pre-fitted on the sensor barrel |
| Electrical interface | Side-facing sealed connector housing with locking tab |
| Housing | One-piece moulded black plastic body |
Installation Guide
- 1Turn the ignition off and disconnect the negative battery cable before touching any engine wiring.
- 2Locate the sensor in the cylinder head or camshaft cover using your engine parts diagram, then release the locking tab and unplug the harness connector.
- 3Remove the single retaining bolt from the mounting ear and withdraw the old sensor straight out of its bore. Confirm the old O-ring comes out with it and is not left inside the head.
- 4Wipe the bore clean of oil and debris, compare the old and new sensors side by side, and lightly lubricate the new O-ring with clean engine oil.
- 5Push the new sensor fully home without twisting the O-ring, align the mounting ear, then fit and tighten the bolt to the torque given in your Mercury service manual.
- 6Reconnect the harness until the latch clicks, reconnect the battery, clear stored fault codes with a marine diagnostic tool if needed, then start the engine and confirm a steady idle and clean throttle response.
Note: Professional installation is recommended for camshaft position sensors on EFI and Verado powerheads.
Troubleshooting & FAQ
Important Notes
- Verify that the product images and the number on your original sensor match 880609, 8M0011987, or 8M0233140, including barrel, O-ring, mounting ear, and connector housing. If anything differs, do not proceed even if your engine model appears in the table.
- Mercury lists this sensor across several serial-number blocks within the same horsepower rating, so the serial number and the original part number take priority over horsepower alone.
- This is an aftermarket replacement and is not a genuine Mercury Marine OEM component.
- Handle the sensor tip carefully. Dropping the sensor or forcing it into a dirty bore can damage the sealing surface and cause intermittent signal faults.
- Professional installation is recommended for camshaft position sensors on EFI and Verado powerheads.
Why Choose JLM MARINE?
- Precision Fit: Cross-referenced to Mercury 880609 (and superseded 8M0011987 / 8M0233140) for the EFI FourStroke, Verado, and QC4V applications listed above.
- Quality Control: Each batch is inspected for dimensional consistency and workmanship.
- Direct from Manufacturer: Aftermarket marine camshaft position sensors engineered for reliable timing feedback on Mercury powerheads.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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