Engine Coupler – Fits Volvo Penta & OMC 5.0L/5.8L Ford Engines (Replaces 3853862-5, 3853862, 985727)
Engine Coupler – Fits Volvo Penta & OMC 5.0L/5.8L Ford Engines (Replaces 3853862-5, 3853862, 985727) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This aftermarket Engine Coupler is designed for a precise fit on Volvo Penta and OMC sterndrives using 5.0L (302 CID) and 5.8L (351 CID) Ford marine engines manufactured between 1989–1996.
It serves as a direct replacement for Volvo Penta part numbers 3853862-5 and 985727, OMC part number 3853862, and Sierra part number 18-21753.
- Engineered for direct bolt-on installation.
- Constructed from high-strength cast metal for durability.
- Backed by a Limited Lifetime Warranty for peace of mind.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3853862-5 |
| Volvo Penta | 985727 |
| OMC | 3853862 |
| Sierra | 18-21753 |
Engine & Model Compatibility
Confirm your engine model and year range in the table below to ensure accurate fitment.
For Volvo Penta Sterndrives: This coupler fits various models equipped with 5.0L and 5.8L Ford engines from the specified years.
For OMC Sterndrives: This coupler is compatible with various models using the 5.0L and 5.8L Ford engines from the specified years.
| Brand | Model | Engine | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | Various | 5.0L (302 CID) Ford | 4-Stroke | 1989–1996 | 3853862-5/985727 | |
| Volvo Penta | Various | 5.8L (351 CID) Ford | 4-Stroke | 1989–1996 | 3853862-5/985727 | |
| OMC | Various | 5.0L (302 CID) Ford | 4-Stroke | 1989–1996 | 3853862 | |
| OMC | Various | 5.8L (351 CID) Ford | 4-Stroke | 1989–1996 | 3853862 |
Technical Specs
- Product Type
- Engine Coupler
- Installation
- Direct bolt-on
- Housing Material
- Metal (Cast)
- Product Dimensions
- 7.0" L × 6.0" W × 6.25" H
- Weight
- 6.6 lbs (3.0 kg)
- Warranty
- Limited Lifetime
- Manufacturing Origin
- Taiwan
- UPC
- 808282186388
- Shipping Dimensions
- 12" × 10" × 7" (305 × 254 × 178 mm)
- Shipping Weight
- 8 lbs (3.6 kg)
What’s in the Box
- 1 × Engine Coupler (Replaces 3853862-5/3853862/985727)
Installation Notes
- Disconnect the battery and any relevant electrical connections for safety.
- Unbolt and remove the old engine coupler from the flywheel and driveshaft.
- Clean the mounting surfaces on the flywheel and driveshaft to ensure a flush fit.
- Align the new coupler with the bolt holes on the flywheel and the splines on the driveshaft.
- Install and hand-tighten all mounting bolts.
- Torque the bolts to the manufacturer's specified values in a star or crisscross pattern.
- Reconnect the battery and test the engine at low RPM to ensure smooth operation.
Troubleshooting & FAQ
How do I know if this engine coupler fits my boat?
This coupler is specifically designed for Volvo Penta and OMC sterndrives with 5.0L (302) and 5.8L (351) Ford engines from 1989–1996. The best way to confirm is by matching your old part's number to the ones listed: Volvo Penta 3853862-5/985727 or OMC 3853862.
What are the signs of a failing engine coupler?
Common symptoms include excessive vibration, unusual rattling or clunking noises from the engine bay (especially when shifting or accelerating), and visible damage or cracks on the old coupler's housing or rubber components.
Is any special alignment required during installation?
Yes, proper alignment between the engine and the sterndrive is critical for coupler longevity and drivetrain performance. While this is a direct bolt-on part, we recommend verifying the engine alignment according to your service manual's specifications.
How often should an engine coupler be inspected or replaced?
Inspect the coupler annually for signs of wear, rust, or cracking. There is no fixed replacement interval; it should be replaced when signs of failure appear. A properly aligned and maintained coupler can last for many years of service.
Can this coupler cause vibrations if installed incorrectly?
Absolutely. Improper installation, incorrect bolt torque, or poor engine-to-driveshaft alignment can cause significant vibrations, leading to premature failure of the coupler and potential damage to other drivetrain components. Professional installation is recommended.
What's the difference between OEM and aftermarket parts?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, where it is batch-inspected for consistency and quality.
How fast is shipping and how much does it cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free, and any available expedited options with pricing will appear at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model is listed as compatible—do not order.
- This is an aftermarket replacement component, not an original equipment manufacturer (OEM) part.
- Professional installation is strongly recommended for safety, proper function, and drivetrain longevity.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard shipping to most regions, with typical delivery in 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we offer fair pricing without compromising on materials or quality control.
Payment & Security
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