Cylinder Head Gasket – Fits Suzuki DT25/DT30 3-Cylinder Outboards (Replaces 11141-95D40)
Cylinder Head Gasket – Fits Suzuki DT25/DT30 3-Cylinder Outboards (Replaces 11141-95D40) 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 DT25/DT30 3-Cylinder Outboards (...
Product Details
This replacement Cylinder Head Gasket is engineered to fit Suzuki 25–30 HP, 2-stroke, 3-cylinder outboard engines manufactured between 1989 and 2000. It ensures a precise seal for optimal engine compression and performance.
It serves as a direct replacement for Suzuki OEM part numbers 11141-95D40, 11141-95D90, and earlier superseded versions including 11141-95D10, 11141-95D20, and 11141-95D30.
- Installation Location: Mounts on the engine's top end power head between the cylinder block and head.
- Material Construction: Made from high-quality composite gasket material to withstand marine environments.
- Engine Design: Specifically designed for 3-cylinder Suzuki outboard motors.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Suzuki | 11141-95D40 | Primary replacement number. May be superseded by 11141-95D90. |
| Suzuki | 11141-95D90 | Supersedes 11141-95D40. |
| Suzuki | 11141-95D10 | Earlier part number in the supersession chain. |
| Suzuki | 11141-95D20 | Earlier part number in the supersession chain. |
| Suzuki | 11141-95D30 | Earlier part number in the supersession chain. |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Suzuki owners: please verify your engine's model and year range to ensure correct fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Suzuki | DT25C | 25 | 2-Stroke | 1989–2000 | 11141-95D40 | Also listed with superseding part 11141-95D90 |
| Suzuki | DT30C | 30 | 2-Stroke | 1989–2000 | 11141-95D40 | Also listed with superseding part 11141-95D90 |
Technical Specs
- Product Type
- Cylinder Head Gasket
- Installation
- Engine Top End / Power Head
- Fuel Type
- Gasoline
- Housing Material
- Composite Gasket Material
- Housing Color
- As shown in source images
- Dimensions
- 16.0" L x 6.44" W x 0.13" H
- Weight
- 85 g (0.19 lb)
What’s in the Box
- 1 x Cylinder Head Gasket (Replaces 11141-95D40 / 11141-95D90)
Installation Notes
- Disconnect the battery cables and ensure the engine has completely cooled before beginning work.
- Release any pressure from the fuel system and remove the engine cowling.
- Carefully disassemble components to access the cylinder head, noting the position of all bolts and brackets.
- Remove the old head gasket and thoroughly clean all mating surfaces on the cylinder block and head. Ensure no old gasket material or carbon buildup remains.
- Position the new gasket correctly. Do not use sealant unless explicitly required by your engine's service manual.
- Reinstall the cylinder head, torquing the bolts to the manufacturer-specified sequence and values to ensure an even seal.
- Reassemble all components, reconnect the battery, and check for leaks before resuming normal operation.
Troubleshooting & FAQ
How do I know if this gasket fits my engine?
This gasket is for Suzuki DT25C and DT30C 3-cylinder, 2-stroke outboards from 1989–2000. The most reliable method is to cross-reference your engine part number against our list of equivalents including 11141-95D40 and 11141-95D90.
What are the signs of a failed head gasket?
Common symptoms of a blown head gasket include engine overheating, a noticeable loss of power or compression, milky or discolored oil (indicating water mixing), and excessive white smoke from the exhaust.
What is the difference between part number 11141-95D40 and 11141-95D90?
11141-95D90 is the official supersession for 11141-95D40, meaning it is the newer, recommended replacement. Both part numbers are functionally identical and interchangeable for the compatible models listed.
Do I need to use a sealant with this gasket?
Most modern gaskets, including this one, are designed for dry installation. Applying sealant can sometimes interfere with the seal. Always follow the specific recommendations in your outboard's official service manual.
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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