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SeaSierra

Exhaust Cover Gasket – Fits Johnson/Evinrude 40–70 HP (Replaces 343863, 0343863)

$9.99 $15.00
Shipping calculated at checkout.

Exhaust Cover Gasket – Fits Johnson/Evinrude 40–70 HP (Replaces 343863, 0343863) is backordered and will ship as soon as it is back in stock.

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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).

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Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This high-quality Exhaust Cover Gasket – Fits Johnson/Evinrude 40–70 HP (Replaces 343863, 0343863) is engineered for a precise fit on various Johnson and Evinrude 2-stroke 40–70 HP outboard engines manufactured between 1997 and 2001. It ensures a reliable seal for the exhaust cover assembly, restoring engine performance and preventing leaks.

This gasket is a direct cross-reference for multiple aftermarket and OEM part numbers, ensuring wide compatibility. Interchangeable parts include Sierra 18-1207, Green Bay Prop GB690480762, and others.

  • Fits 3-cylinder 40-70 HP outboard engines.
  • Installs on the exhaust cover.
  • Designed for use in marine environments.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket brands.

Brand Part Number
Johnson/Evinrude 343863
Johnson/Evinrude 0343863
Green Bay Prop GB690480762
MarineSpareParts AM343863
Sierra 18-1207
Maxgear 82-0922
NTY HZP-CH-007
Autofren D42063C
Esen SKV 44SKV092
Kamoka JBC0334
Polcar ERT402330

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This gasket is designed for specific Johnson and Evinrude models. Please verify your engine's model number against this list to ensure proper fitment.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Evinrude BE50DTLEUR 50 2-Stroke 1997 343863
Evinrude BE60ELEUA 60 2-Stroke 1997 343863
Evinrude BE60TLECM 60 2-Stroke 1998 343863
Evinrude BE60TLEUA 60 2-Stroke 1997 343863
Evinrude BE70ELECB 70 2-Stroke 1998 343863
Evinrude BE70ELEUM 70 2-Stroke 1997 343863
Evinrude BE70TLECB 70 2-Stroke 1998 343863
Evinrude BE70TLEUM 70 2-Stroke 1997 343863
Evinrude E50DTLECA 50 2-Stroke 1998 343863
Evinrude E50DTLEUR 50 2-Stroke 1997 343863
Evinrude E50ELEUR 50 2-Stroke 1997 343863
Evinrude E50TTLECA 50 2-Stroke 1998 343863
Evinrude E50TTLEUR 50 2-Stroke 1997 343863
Evinrude E60ELEUA 60 2-Stroke 1997 343863
Evinrude E60TLECM 60 2-Stroke 1998 343863
Evinrude E60TLEUA 60 2-Stroke 1997 343863
Evinrude E60TTLECM 60 2-Stroke 1998 343863
Evinrude E60TTLEUA 60 2-Stroke 1997 343863
Evinrude E65RSLZ2 65 2-Stroke 1997 343863
Evinrude E65WELEES 65 2-Stroke 1999 343863
Evinrude E65WELSIR 65 2-Stroke 2001 343863 Commercial, elec start, 20 in shaft
Evinrude E65WELSSC 65 2-Stroke 2000 343863 Commercial, Elec. Start, 20 IN. shaft
Evinrude E65WRLEEO 65 2-Stroke 1999 343863
Evinrude E65WRLEES 65 2-Stroke 1999 343863
Evinrude E65WRLSIR 65 2-Stroke 2001 343863 Commercial, rope start, 20 in shaft
Evinrude E65WRLSSC 65 2-Stroke 2000 343863 Commercial, Rope Start, 20 IN. shaft
Evinrude E65WRYEEO 65 2-Stroke 1999 343863
Evinrude E65WRYEES 65 2-Stroke 1999 343863
Evinrude E65WRYSIR 65 2-Stroke 2001 343863 Commercial, rope start, 22.5 in shaft
Evinrude E65WRYSSC 65 2-Stroke 2000 343863 Commercial, Rope Start, 22.5 IN. shaft
Evinrude E70TLECB 70 2-Stroke 1998 343863
Evinrude E70TLEUM 70 2-Stroke 1997 343863
Evinrude HE70TXEUM 70 2-Stroke 1997 343863
Evinrude SE65RSLD 65 2-Stroke 1998 343863
Evinrude SE65RSLZ2 65 2-Stroke 1997 343863
Evinrude SE65RSYD 65 2-Stroke 1998 343863
Evinrude SE65RSYZ2 65 2-Stroke 1997 343863
Evinrude SE65WMLD 65 2-Stroke 1998 343863
Evinrude SE65WMLZ2 65 2-Stroke 1997 343863
Evinrude SE65WMYD 65 2-Stroke 1998 343863
Evinrude SE65WMYZ2 65 2-Stroke 1997 343863
Evinrude J40JPLEEC 40 2-Stroke 1999 343863
Evinrude J40JPLSIA 40 2-Stroke 2001 343863 jet drive, elec start, TNT, 20 in shaft
Evinrude J40JPLSSR 40 2-Stroke 2000 343863 Jet Drive, Elec Start, TNT, 20 IN. shaft
Evinrude J40JVLSIA 40 2-Stroke 2001 343863 jet drive, elec start, TNT, 20 in shaft, wht
Johnson BJ50DTLEUR 50 2-Stroke 1997 343863
Johnson BJ60ELEUA 60 2-Stroke 1997 343863
Johnson BJ60TLECM 60 2-Stroke 1998 343863
Johnson BJ60TLEUA 60 2-Stroke 1997 343863
Johnson BJ70ELECB 70 2-Stroke 1998 343863
Johnson BJ70ELEUM 70 2-Stroke 1997 343863
Johnson BJ70PLEEE 70 2-Stroke 1999 343863
Johnson BJ70PLSIS 70 2-Stroke 2001 343863 elec start, TNT, 20 in shaft, n/a usa
Johnson BJ70PLSSD 70 2-Stroke 2000 343863 Elec Start, TNT, 20 IN. shaft
Johnson BJ70TLECB 70 2-Stroke 1998 343863
Johnson BJ70TLEUM 70 2-Stroke 1997 343863
Johnson HJ70TXEUM 70 2-Stroke 1997 343863
Johnson J50DTLECA 50 2-Stroke 1998 343863
Johnson J50DTLEUR 50 2-Stroke 1997 343863
Johnson J50ELEUR 50 2-Stroke 1997 343863
Johnson J50TTLECA 50 2-Stroke 1998 343863
Johnson J50TTLEUR 50 2-Stroke 1997 343863
Johnson J60ELEUA 60 2-Stroke 1997 343863
Johnson J60PLEEB 60 2-Stroke 1999 343863
Johnson J60PLSID 60 2-Stroke 2001 343863 elec start, TNT, 20 in shaft
Johnson J60PLSSE 60 2-Stroke 2000 343863 Elec Start, TNT, 20 IN. shaft
Johnson J60TLECM 60 2-Stroke 1998 343863
Johnson J60TLEUA 60 2-Stroke 1997 343863
Johnson J60TTLECM 60 2-Stroke 1998 343863
Johnson J60TTLEUA 60 2-Stroke 1997 343863
Johnson J60VLSID 60 2-Stroke 2001 343863 elec start, TNT, 20 in shaft, wht
Johnson J65RSLZ2 65 2-Stroke 1997 343863
Johnson J65WELEES 65 2-Stroke 1999 343863
Johnson J65WELSIR 65 2-Stroke 2001 343863 Commercial, elec start, 20 in shaft
Johnson J65WELSSC 65 2-Stroke 2000 343863 Commercial, Elec. Start, 20 IN. shaft
Johnson J65WRLEEO 65 2-Stroke 1999 343863
Johnson J65WRLEES 65 2-Stroke 1999 343863
Johnson J65WRLSIR 65 2-Stroke 2001 343863 Commercial, rope start, 20 in shaft
Johnson J65WRLSSC 65 2-Stroke 2000 343863 Commercial, Rope Start, 20 IN. shaft
Johnson J65WRYEEO 65 2-Stroke 1999 343863
Johnson J65WRYEES 65 2-Stroke 1999 343863
Johnson J65WRYSIR 65 2-Stroke 2001 343863 Commercial, rope start, 22.5 in shaft
Johnson J65WRYSSC 65 2-Stroke 2000 343863 Commercial, Rope Start, 22.5 IN. shaft
Johnson J70PLEEE 70 2-Stroke 1999 343863
Johnson J70PLSIS 70 2-Stroke 2001 343863 elec start, TNT, 20 in shaft
Johnson J70PLSSD 70 2-Stroke 2000 343863 Elec Start, TNT, 20 IN. shaft
Johnson J70TLECB 70 2-Stroke 1998 343863
Johnson J70TLEUM 70 2-Stroke 1997 343863
Johnson J70VLSIS 70 2-Stroke 2001 343863 elec start, TNT, 20 in shaft
Johnson RJ70PLSIS 70 2-Stroke 2001 343863 elec start, TNT, 20 in shaft
Johnson RJ70PLSSD 70 2-Stroke 2000 343863 Elec Start, TNT, 20 IN. shaft
Johnson SJ65RSLD 65 2-Stroke 1998 343863
Johnson SJ65RSLZ2 65 2-Stroke 1997 343863
Johnson SJ65RSYD 65 2-Stroke 1998 343863
Johnson SJ65RSYZ2 65 2-Stroke 1997 343863
Johnson SJ65WMLD 65 2-Stroke 1998 343863
Johnson SJ65WMLZ2 65 2-Stroke 1997 343863
Johnson SJ65WMYD 65 2-Stroke 1998 343863
Johnson SJ65WMYZ2 65 2-Stroke 1997 343863

Technical Specs

Product Type
Gasket
Installation
Exhaust Cover
Fuel Type
Gasoline
Application
Outboard Engine
Other Technical Attributes
New OEM part, for 3-cylinder 40-70 HP engines
Length
17.13
Width
14.0
Height
0.13

What’s in the Box

  • 1x Exhaust Cover Gasket

Installation Notes

  1. Ensure the engine is off and the battery is disconnected. Allow the engine to cool completely.
  2. Access the exhaust cover on the engine block. This may require removing the engine cowling and other components.
  3. Carefully remove the bolts securing the exhaust cover. Note their positions if they are different lengths.
  4. Gently pry the cover off. Remove the old gasket and discard it.
  5. Thoroughly clean both the engine block and the exhaust cover mating surfaces. All old gasket material and residue must be removed to ensure a proper seal.
  6. Position the new gasket correctly on the engine block.
  7. Reinstall the exhaust cover and tighten the bolts in a crisscross pattern to the manufacturer-specified torque to ensure even pressure.
  8. Reconnect the battery, start the engine, and carefully check for any signs of exhaust leaks around the cover.

Troubleshooting & FAQ

What are the signs of a failing exhaust cover gasket?

Common symptoms include visible exhaust or water leaks around the cover, a change in engine sound (louder or popping noises), reduced engine performance, or overheating due to leaking coolant passages integrated into the cover on some models.

How can I be sure this gasket will fit my engine?

The most reliable method is to match your engine's full model number and year to the compatibility table provided on this page. Do not rely on horsepower alone, as fitment is specific.

Why do some websites show this part number as a brake caliper?

This is a known issue of part number collision, where different industries (automotive vs. marine) use the same number for unrelated parts. This part, 343863, is confirmed to be an exhaust cover gasket for Johnson/Evinrude outboards based on specialized marine supplier data.

Is any sealant required when installing this gasket?

Generally, new gaskets like this are designed to be installed dry. However, always consult your engine's specific service manual, as some manufacturers may recommend a light application of a specific sealant.

What is the difference between Johnson and Evinrude part numbers?

For the years this gasket covers, Johnson and Evinrude were both under the OMC (Outboard Marine Corporation) umbrella and shared many of the same parts. The part numbers are often interchangeable, as are the components themselves.

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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