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Description
Oil Pressure Sender – Fits Volvo Penta & MerCruiser 3.0L, 4.3L, 5.0L, 5.7L (Replaces 815425T, 8M0068784, 3857532)Oil Pressure Sender Fits Volvo Penta & MerCruiser 3. 0L, 4. 3L, 5. 0L, 5. 7L This oil pressure sender provides a reliable replacement for specific Volvo Penta and MerCruiser gasoline sterndrive engines. It is designed to fit a wide range of 3. 0L, 4. 3L, 5. 0L, and 5. 7L models, sending accurate pressure data to your dashboard gauge. This sender is a direct replacement for MerCruiser part numbers 815425T and 8M0068784, Volvo Penta part number 3857532,
Oil Pressure Sender – Fits Volvo Penta & MerCruiser 3.0L, 4.3L, 5.0L, 5.7L
This oil pressure sender provides a reliable replacement for specific Volvo Penta and MerCruiser gasoline sterndrive engines. It is designed to fit a wide range of 3.0L, 4.3L, 5.0L, and 5.7L models, sending accurate pressure data to your dashboard gauge.
This sender is a direct replacement for MerCruiser part numbers 815425T and 8M0068784, Volvo Penta part number 3857532, and Sierra part number 18-5899.
- Installation Type: Direct fit, screw-in
- Fuel Compatibility: Gasoline
- Connection: Single-wire (1-wire) electrical connector
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| MerCruiser | 815425T |
| MerCruiser | 8M0068784 |
| Volvo Penta | 3857532 |
| Sierra | 18-5899 |
Compatible Engine Models
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| MerCruiser | 3.0L | Various | 4-Stroke | 815425T/8M0068784 |
| MerCruiser | 4.3L | Various | 4-Stroke | 815425T/8M0068784 |
| MerCruiser | 5.0L | Various | 4-Stroke | 815425T/8M0068784 |
| MerCruiser | 5.7L | Various | 4-Stroke | 815425T/8M0068784 |
| Volvo Penta | 3.0L | Various | 4-Stroke | 3857532 |
| Volvo Penta | 4.3L | Various | 4-Stroke | 3857532 |
| Volvo Penta | 5.0L | Various | 4-Stroke | 3857532 |
| Volvo Penta | 5.7L | Various | 4-Stroke | 3857532 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Oil Pressure Sender/Sensor |
| Installation | Direct fit, screw-in |
| Fuel Type | Gasoline |
| Connection | 1-wire electrical connector |
| Fitting Type | NPT thread |
| Thread Size | 1/8" NPT |
| Working Pressure | 0-100 PSI |
| Other Technical Attributes | Provides data to oil pressure gauge on dashboard |
Package Contents
1 x Oil Pressure Sender/Sensor (Replaces 815425T, 8M0068784, 3857532)
Installation Guide
- Safety First: Disconnect the boat's battery before beginning work.
- Locate the Sender: Find the existing oil pressure sender on the engine block. It is often located near the oil filter or the distributor.
- Disconnect Wire: Carefully detach the single electrical wire from the top of the old sender.
- Remove Old Sender: Using an appropriately sized wrench, unscrew and remove the old sender from the engine block. Be prepared for minor oil spillage.
- Prepare New Sender: Apply a suitable pipe thread sealant to the threads of the new sender to prevent leaks. Do not overtighten.
- Install New Sender: Screw the new sender into the engine block and tighten it securely.
- Reconnect Wire: Attach the electrical wire to the terminal on the new sender.
- Final Check: Reconnect the battery. Start the engine and carefully check for any oil leaks around the new sender. Verify that the oil pressure gauge on your dashboard is providing a reading.
Troubleshooting & FAQ
- Q: How do I confirm this will fit my engine?
- A: The best way to ensure compatibility is to match your existing part number to the cross-reference list: MerCruiser 815425T/8M0068784, Volvo Penta 3857532, or Sierra 18-5899. Also, check the compatible engine models table. Visually comparing your old part to our product images is also recommended.
- Q: What are common signs of a failing oil pressure sender?
- A: Symptoms include an oil pressure gauge that reads zero, is pegged at maximum, or fluctuates erratically. An engine warning light may also illuminate. These signs indicate that the sender is no longer providing accurate data to the gauge.
- Q: Where is this sender typically located?
- A: On most compatible MerCruiser and Volvo Penta engines, the oil pressure sender is found screwed into the engine block, often near the oil filter housing or close to the distributor.
- 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:
- 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
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As a first time mom I was looking for a clean product to use on my little one. I absolutely love all Babo products on my baby. The ingredients are clean and it also makes my little one’s hair super soft after using there shampoo as well. It really works well and my little one’s hair is super soft and shiny after his hair dries from using this product. My little one has a lot of thick hair after using both the Shampoo and Conditioner from Babo.
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Reviewed in the United States on June 9, 2025
★★★★★ 3
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I love the Babo fragrance free lotion and have been looking for a good conditioner. Unfortunately, I was tricked by the "no synthetic fragrances" in the description and being a trusted brand I didn't read the full ingredients. This product does have "natural fragrances" added. Concentrated botanicals & natural substances are not as nature made them and because they are highly concentrated they also cause my family irritation and allergies. The fragrance was pretty strong. I put it in the palm of my hand before I realized it was fragranced. I immediately washed it down the drain, yet it took washing my hands 5 times with soap and finally with shampoo and another soap wash before I could get the scent off my hands. It wasn't even pleasant smelling. It lingered around the bathroom and bedroom for a couple of hours. That said, in the brief time it was on my hands it felt very nourishing and moisturizing like it would be great on dry and brittle hair... just what I was looking for. Just, without the stink. 5 stars for the conditioning power, 1 star (since no zero stars) for the misleading description... average 3 stars. I hope Babo puts out a fragrance free version for those of us that prefer not to smell what may be unpleasant to others or affect those around us negatively.
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Reviewed in the United States on September 1, 2019
★★★★★ 5
Love
The smell is divine and i use for all 3 of my littles hair and it makes them shiny and keeps their curls fresh
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★★★★★ 5
These products are the best I've ever used. Well worth the cost.
I am always trying out different products and am constantly disappointed. This conditioner really stands apart from the rest. It's thick and creamy and a little goes a long way. My hair doesn't feel that smooth when I deep condition it for a half hour. Very impressed, bravo! I used their shampoo and detangler with it, along with another smoothing/anti breakage serum. This stuff if so pure, I have to use some kind of smoothing cream with dimethicone in it to keep my hair looking styled. (Otherwise my hair just looks like soft cotton, my flyaways curls everywhere). I use this product with some of my old favs mixed in and the results are outstanding!! Soooo happy I finally found a functional, organic bath product!
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★★★★★ 5
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