Cylinder Head Gasket – Fits Suzuki DT20, DT25, DT30 (Replaces 11141-96303, 11141-96344)
Cylinder Head Gasket – Fits Suzuki DT20, DT25, DT30 (Replaces 11141-96303, 11141-96344) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Cylinder Head Gasket – Fits Suzuki DT20, DT25, DT30 (Replaces 11141...
Product Details
This is an aftermarket Cylinder Head Gasket designed for Suzuki 2-stroke 20 HP, 25 HP, and 30 HP outboard motors (DT20, DT25, DT30) manufactured between 1983 and 1988. It provides a reliable seal for the engine's power head, ensuring optimal compression and performance.
It serves as a direct cross-reference for Suzuki parts 11141-96343, 11141-96344, 11141-96344-000, and Sierra part 18-3809, offering an OEM-equivalent fit and function.
- Engineered specifically for 2-cylinder, 2-stroke power heads.
- Made from a high-quality, asbestos-free composite material.
- Installation requires following the manufacturer's specified torque sequence.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Suzuki | 11141-96343 |
| Suzuki | 11141-96344 |
| Suzuki | 11141-96344-000 |
| Sierra | 18-3809 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This gasket is compatible with the following Suzuki G–Y model year outboards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Suzuki | DT20 | 20 | 2-Stroke | 1983–1988 | 11141-96303 | G-Y models |
| Suzuki | DT25 | 25 | 2-Stroke | 1983–1988 | 11141-96303 | G-Y models |
| Suzuki | DT30 | 30 | 2-Stroke | 1983–1988 | 11141-96303 | G-Y models |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Engine Type
- Designed for 2-cylinder, 2-stroke engines
- Housing Material
- Asbestos-free composite material
- Fitting Type
- OEM-style fit
- Fuel Type
- Compatible with regular gasoline engines
- Dimensions
- 11.0" L x 6.38" W x 0.13" H
- Warranty
- 1 year limited (TMP Global)
What’s in the Box
- 1 x Cylinder Head Gasket (Replaces 11141-96303)
Installation Notes
- Disconnect the battery and ensure the engine is cool before starting work.
- Thoroughly clean the cylinder head and engine block surfaces, removing all traces of old gasket material and debris.
- Place the new gasket onto the cylinder block, ensuring correct orientation.
- Carefully lower the cylinder head into position over the alignment dowels.
- Lubricate bolt threads as per the service manual and tighten them in the specified sequence and torque. Failure to use the correct sequence can cause leaks and damage.
Troubleshooting & FAQ
How do I know if this gasket will fit my Suzuki engine?
This gasket is for Suzuki DT20, DT25, and DT30 models from 1983–1988 (G-Y models). The most reliable way to confirm fitment is to match your old part number to one of the equivalents listed in our Part Number Matrix.
What are the signs of a failed head gasket?
Common symptoms include engine overheating, a noticeable loss of power or compression, milky or discolored oil, water droplets on the spark plugs, or excessive white smoke from the exhaust.
Should I use sealant with this gasket?
This gasket is designed to be installed dry. Applying additional sealants can interfere with its ability to seal properly and is not recommended unless explicitly required by your engine's service manual.
Why is the torque sequence so important?
A specific torque sequence ensures that clamping pressure is applied evenly across the cylinder head. This prevents warping the head and ensures a complete, durable seal. Always refer to your outboard's service manual for the correct sequence and torque values.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is 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
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