Bypass Cover Gasket – Fits Johnson/Evinrude 2-Cylinder (Replaces 319661, 0319661)
Bypass Cover Gasket – Fits Johnson/Evinrude 2-Cylinder (Replaces 319661, 0319661) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Bypass Cover Gasket – Fits Johnson/Evinrude 2-Cylinder (Replaces 31...
Product Details
This Bypass Cover Gasket – Fits Johnson/Evinrude 2‑Cylinder (Replaces 319661, 0319661) is designed for a wide array of Johnson and Evinrude 2-cylinder outboard engines. It generally fits models in the 18–35 HP range manufactured between the late 1970s and 2005, ensuring a precise seal for the bypass cover.
It serves as a direct replacement for Johnson/Evinrude OEM part numbers 319661 and 0319661.
- Installs on the engine's bypass cover.
- This is a new, old stock (NOS) inventory part and may show minor signs of shelf life.
- Engineered to meet or exceed original factory specifications for a reliable fit.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 319661 |
| Johnson/Evinrude | 0319661 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | General 2‑Cylinder | 20 | 2‑Stroke | 1985–1989 | 319661/0319661 | Fits various 2‑cylinder models. |
| Johnson/Evinrude | General 2‑Cylinder | 25 | 2‑Stroke | 1985–1989 | 319661/0319661 | Fits various 2‑cylinder models. |
| Johnson/Evinrude | General 2‑Cylinder | 30 | 2‑Stroke | 1985–1989 | 319661/0319661 | Fits various 2‑cylinder models. |
| Johnson/Evinrude | Various Outboards | 18–35 | 2‑Stroke | Late 1970s–2005 | 319661/0319661 | Broad compatibility. |
Technical Specs
- Product Type
- Gasket
- Installation Location
- Bypass Cover
- Product Dimensions
- 11.25″ H x 6.0″ W x 1.13″ L
- Package Dimensions
- 11.25″ H x 6.0″ W x 1.13″ L
- Condition
- New, old stock
- Warranty
- 30 days
What’s in the Box
- 1x Bypass Cover Gasket (Replaces 319661/0319661)
Installation Notes
- Disconnect the battery and ensure the engine is cool before starting.
- Locate and drain any relevant fluids, such as coolant, to prevent spills.
- Carefully remove the bypass cover assembly, taking note of all fastener locations.
- Remove the old gasket and thoroughly clean both the cover and engine block surfaces. Ensure they are free of old gasket material, oil, and debris.
- Position the new gasket correctly on the engine block.
- Reinstall the bypass cover, tightening fasteners to the manufacturer's recommended torque specifications in a crisscross pattern.
- Refill any drained fluids and reconnect the battery.
- Start the engine and carefully inspect the bypass cover area for any signs of leaks.
Troubleshooting & FAQ
How can I confirm this gasket will fit my specific Johnson or Evinrude engine?
The most reliable method is to match your existing part number to the ones listed: 319661 or 0319661. Additionally, check your engine's HP and year against the compatibility table. This part fits a broad range of 2-cylinder models from 18–35 HP made between the late 1970s and 2005.
What are the signs of a worn-out bypass cover gasket?
Common symptoms include visible coolant or oil leaks around the bypass cover, engine overheating, and a loss of performance. Any visible cracking or brittleness on the old gasket during inspection indicates it requires replacement.
What does "new, old stock" (NOS) mean for this part?
It means the gasket is brand new and has never been installed, but it has been in storage for an extended period. While functionally perfect, it may have minor cosmetic signs of shelf life, which do not affect its performance or sealing capability.
Is any sealant required when installing this gasket?
Generally, modern gaskets like this are designed to be installed dry. However, always consult your specific engine's service manual. If the manual recommends a sealant for the bypass cover, apply it sparingly as directed.
OEM vs. Aftermarket?
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.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
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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