Throttle Body Gasket – Fits Suzuki Outboard DF40/DF50 (Replaces 13421-87J00)
Throttle Body Gasket – Fits Suzuki Outboard DF40/DF50 (Replaces 13421-87J00) 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
Throttle Body Gasket – Fits Suzuki Outboard DF40/DF50 (Replaces 134...
Product Details
This replacement Throttle Body Gasket – Fits Suzuki Outboard DF40/DF50 creates a secure seal between the throttle body and the intake manifold, which is essential for preventing vacuum leaks and ensuring proper engine performance. It is specifically designed for Suzuki Marine 40-50 HP 4-Stroke outboard engines.
This part is a direct replacement for Suzuki OEM part number 13421-87J00.
- Installs directly between the throttle body and intake manifold.
- Engineered to seal the air intake system from vacuum leaks.
- Compatible with gasoline-fueled Suzuki 40 and 50 HP 4-Stroke outboards.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Suzuki | 13421-87J00 |
| Suzuki | 1342187J00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits a range of 40 and 50 horsepower 4-stroke outboard models from Suzuki Marine.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Suzuki | DF40 | 40 | 4-Stroke | 13421-87J00 | ||
| Suzuki | DF40QH | 40 | 4-Stroke | 13421-87J00 | Tiller handle model | |
| Suzuki | DF40T | 40 | 4-Stroke | 13421-87J00 | Remote control model | |
| Suzuki | DF50 | 50 | 4-Stroke | 13421-87J00 | ||
| Suzuki | DF50QH | 50 | 4-Stroke | 13421-87J00 | Tiller handle model | |
| Suzuki | DF50T | 50 | 4-Stroke | 13421-87J00 | Remote control model | |
| Suzuki | DF50TH | 50 | 4-Stroke | 13421-87J00 | ||
| Suzuki | DF50WT | 50 | 4-Stroke | 13421-87J00 | ||
| Suzuki | DF50WQH | 50 | 4-Stroke | 13421-87J00 |
Technical Specs
- Product Type
- Throttle Body Gasket
- Installation
- Direct replacement, mounts between throttle body and intake manifold
- Fuel Type
- Gasoline
- Function
- Seals the connection between throttle body and intake manifold
- Dimensions
- 9.0" x 9.0" x 0.2"
What’s in the Box
- 1 x GASKET,THROTTLE (13421-87J00)
Installation Notes
- Disconnect the negative battery terminal to prevent accidental shorts.
- Relieve fuel system pressure according to the manufacturer's service manual.
- Carefully disconnect any sensors, fuel lines, or linkages attached to the throttle body.
- Remove the mounting bolts holding the throttle body to the intake manifold.
- Gently remove the throttle body. Avoid prying if it is stuck.
- Remove the old gasket and thoroughly clean both mating surfaces. All traces of old material must be removed for a proper seal.
- Position the new gasket over the mounting studs or alignment pins.
- Reinstall the throttle body and tighten the bolts to the manufacturer-specified torque in a crisscross sequence.
- Reconnect all sensors, lines, and linkages.
- Reconnect the battery, prime the fuel system, and start the engine to check for leaks.
Troubleshooting & FAQ
How do I know if my throttle body gasket needs replacing?
Symptoms of a failing throttle body gasket include a high or erratic idle, a hissing sound from the engine bay (indicating a vacuum leak), poor acceleration, and engine fault codes related to a lean air/fuel mixture.
Will this gasket fit my specific model year?
This gasket is designed for a wide range of Suzuki DF40 and DF50 4-stroke models. As manufacturers sometimes make mid-year changes, we strongly recommend comparing your old part to the images and part numbers provided to ensure a perfect match.
What is the recommended replacement interval for this gasket?
Throttle body gaskets do not have a fixed service interval. They should be replaced whenever the throttle body is removed for cleaning or service, or if any signs of a leak are observed.
Do I need to use sealant with this gasket?
This gasket is designed to be installed dry. Applying additional sealants is generally not recommended as it can interfere with proper sealing or cause excess material to enter the intake manifold. Always follow the guidelines in your engine's official service manual.
Is this an OEM part?
This listing is for an aftermarket replacement part, not an OEM component. It has been engineered to meet or exceed original equipment specifications, using comparable materials, and is produced in an ISO 9002 certified facility with rigorous quality control.
What are the shipping speed and cost?
We offer fast worldwide shipping, with typical transit times of 5–15 days for most regions. Standard shipping is free. If available for your location, expedited shipping options and costs will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against any manufacturing defects under normal marine use. Should an issue arise, please contact our support team with your order number. Returns are accepted within our standard return window for items that are unused and in their original packaging. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before ordering. If anything differs—even if your model is listed as compatible—do not purchase.
- This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.
- Professional installation is recommended for safety and to ensure optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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