Powerhead Base Gasket – Fits Mercury 50-60 HP 3-Cylinder Outboards (Replaces 27-60317, 60317)
Powerhead Base Gasket – Fits Mercury 50-60 HP 3-Cylinder Outboards (Replaces 27-60317, 60317) is backordered and will ship as soon as it is back in stock.
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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.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Powerhead Base Gasket – Fits Mercury 50-60 HP 3-Cylinder Outboards ...
Product Details
This is a high-quality aftermarket Powerhead Base Gasket designed for Mercury Marine 50-60 HP, 3-cylinder, 2-stroke outboard motors. It ensures a precise seal between the powerhead and the exhaust plate, which is critical for preventing exhaust leaks and maintaining engine performance.
It serves as a direct replacement for Mercury OEM part numbers 27-60317 and 60317.
- Engineered for a direct fit on compatible 3-cylinder models.
- Installs between the powerhead and exhaust plate assembly.
- Built to meet or exceed original factory specifications for reliability.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury | 27-60317 | Powerhead to Exhaust Plate Gasket |
| Mercury | 60317 | Powerhead Base Gasket |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury Marine engines, this part is specific to the 3-cylinder 50-60 HP 2-stroke outboard series.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | 3-Cylinder Outboards | 50-60 | 2-Stroke | 27-60317, 60317 | Powerhead Base Gasket to Exhaust Pipe |
Technical Specs
- Product Type
- Powerhead Base Gasket
- Installation
- Between Powerhead and Exhaust Plate
- Dimensions
- 13" L x 10" W x 1.06" H
- OEM Part Number
- 27-60317, 60317
- Part Description
- Powerhead to Exhaust Plate Gasket
What’s in the Box
- 1 x Gasket, Powerhead to Exhaust Plate (Replaces 27-60317)
Installation Notes
- Disconnect the battery and ensure the engine is cool. Drain relevant fluids as specified in your service manual.
- Carefully remove the powerhead from the exhaust plate, taking note of all disconnected hoses and electrical connectors.
- Remove the old gasket and thoroughly clean both mating surfaces. Scrape away all residual gasket material and degrease the surfaces for a proper seal.
- Place the new gasket into position, ensuring all bolt holes and passages align perfectly.
- Reinstall the powerhead. Tighten the mounting bolts in the sequence and to the torque specifications outlined in your engine's official service manual.
- Reconnect all systems, refill fluids, and check for leaks before starting the engine.
Troubleshooting & FAQ
How do I know if my powerhead gasket is failing?
Common signs of a failed powerhead base gasket include visible exhaust or water leaks around the seam between the powerhead and the midsection, a loss of compression, or overheating. You may also hear an unusual hissing or popping sound from the engine.
Is sealant required when installing this gasket?
Generally, modern gaskets like this are designed to be installed dry on clean, flat surfaces. However, always consult your specific engine's service manual, as some manufacturers recommend a light application of a specific sealant.
Will this fit a 4-cylinder Mercury engine?
No, this gasket is specifically designed for the 3-cylinder 50-60 HP Mercury outboards. Using it on a 4-cylinder or any other engine will result in misalignment and leaks.
What is the recommended replacement interval?
This gasket should be replaced any time the powerhead is removed from the exhaust plate for service. It is a single-use crush gasket and should not be reused.
How can I confirm this part fits my exact engine model and year?
The best method is to cross-reference the OEM part number (27-60317 or 60317) with your engine's service manual or parts diagram. If you are unsure, contact us with your engine's serial number for assistance.
What makes this different from the original OEM part?
This is a direct aftermarket replacement. While it functions identically and is made from comparable, high-quality materials, it is not sourced from the original equipment manufacturer. It is designed to meet or exceed OEM specifications for fit and function.
What are the OEM vs. Aftermarket advantages?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
How fast is shipping and what does it cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
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 delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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