Exhaust Gasket – Fits Suzuki DT40 2-Stroke Outboard (Replaces 11434-94411)
Exhaust Gasket – Fits Suzuki DT40 2-Stroke Outboard (Replaces 11434-94411) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Exhaust Gasket – Fits Suzuki DT40 2-Stroke Outboard (Replaces 11434...
Product Details
This Exhaust Gasket provides a direct-fit seal for the lower unit exhaust system on Suzuki 40 HP 2-Stroke outboard engines, specifically covering models DT40C-W-G-X (1986–1999) and DT40W K1-K4 (2001–2004).
It is a direct interchange for Suzuki OEM part numbers 11434-92L00, 11434-94400-H17, 11434-94410, and 11434-94411.
- Installation Location: Mounts under the oil seal in the lower unit.
- Primary Function: Seals the exhaust passage to prevent leaks.
- Material: Composed of durable composite gasket material to withstand marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Suzuki | 11434-92L00 |
| Suzuki | 11434-94400-H17 |
| Suzuki | 11434-94410 |
| Suzuki | 11434-94411 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part fits the following Suzuki outboard models:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Suzuki | DT40C | 40 | 2-Stroke | 1986–1999 | 11434-94411 |
| Suzuki | DT40W | 40 | 2-Stroke | 1986–1999 | 11434-94411 |
| Suzuki | DT40G | 40 | 2-Stroke | 1986–1999 | 11434-94411 |
| Suzuki | DT40X | 40 | 2-Stroke | 1986–1999 | 11434-94411 |
| Suzuki | DT40W K1-K4 | 40 | 2-Stroke | 2001–2004 | 11434-94411 |
Technical Specs
- Product Type
- Exhaust Gasket
- Installation
- Under Oil Seal, Lower Unit
- Fuel Type
- Gasoline
- Housing Material
- Gasket Material (Paper/Composite)
- Dimensions
- Height: 0.4 cm; Width: 22.0 cm; Length: 31.7 cm
- Weight
- 0.1300 lb (0.059 kg)
- Other Attributes
- Used in lower unit exhaust system
What’s in the Box
- 1 x Exhaust Gasket (Replaces 11434-94411)
Installation Notes
- Ensure the engine is off and cool. Disconnect the negative battery terminal for safety.
- Access the lower unit assembly where the exhaust components are located.
- Carefully disassemble the necessary parts to expose the old exhaust gasket.
- Remove the old gasket and meticulously clean both mating surfaces. All old gasket material, sealant, and debris must be removed for a proper seal.
- Position the new gasket correctly onto the clean surface. Do not use sealant unless specifically required by your engine's service manual.
- Reassemble all components in the reverse order of disassembly. Tighten all fasteners to the manufacturer’s specified torque values.
- Once reassembled, reconnect the battery, start the engine, and check for any exhaust or water leaks around the new gasket.
Troubleshooting & FAQ
How do I identify a failing exhaust gasket?
Common signs of a bad gasket include a noticeably louder exhaust noise, the smell of exhaust fumes around the engine, visible exhaust or water leaks from the lower unit joints, or reduced engine performance. A visual inspection may also reveal cracks or deterioration of the old gasket.
Is this gasket compatible with my specific Suzuki DT40 model?
This gasket is designed for Suzuki DT40C/W/G/X models from 1986–1999 and DT40W K1-K4 models from 2001–2004. Always double-check your engine’s model and year against the compatibility chart provided on this page to ensure a perfect fit.
Should I apply sealant to this gasket during installation?
In most cases, this gasket is designed to be installed dry onto clean, smooth surfaces. Applying sealant can sometimes cause it to slip out of place. Refer to your outboard’s official service manual for guidance specific to your model.
What is the difference between this part and an OEM Suzuki gasket?
Our gasket is an aftermarket component engineered to meet or exceed OEM specifications for fit, material composition, and durability. It provides the same reliable seal as the original part (11434-94411) at a more competitive price point.
Can I reuse my old exhaust gasket?
No. Gaskets are single-use components that compress and deform to create a seal. Once removed, they lose their sealing ability and must be replaced to prevent leaks.
What is this gasket made from?
It is manufactured from a high-quality, heat-resistant composite gasket material designed to withstand the harsh conditions of a marine exhaust system, ensuring a long-lasting and reliable seal.
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.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
