Throttle Body Gasket – Fits Suzuki DF300AP/T/Z Outboards
Throttle Body Gasket – Fits Suzuki DF300AP/T/Z Outboards 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
Throttle Body Gasket – Fits Suzuki DF300AP/T/Z Outboards
Product Details
This replacement Throttle Body Gasket is designed for Suzuki 4-Stroke 300 HP outboard engines, including models DF300AP, DF300T, and DF300Z from 2007 through 2012 and later years. It ensures a proper seal for optimal engine performance.
It serves as a direct replacement for Suzuki OEM part numbers 13421-98J00 and 13421-98L00.
- Installation Type: Direct OEM replacement
- Compatible Fuel Type: Gasoline
- Package includes one gasket
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| Suzuki | 13421-98J00 | 13421-98L00 | Original part number. |
| Suzuki | 13421-98L00 | Current part number. Supersedes 13421-98J00. |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is compatible with the following Suzuki outboard models:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Suzuki | DF300AP | 300 HP | 4-Stroke | 2012 and later | 13421-98L00 | Supersedes 13421-98J00 |
| Suzuki | DF300T | 300 HP | 4-Stroke | 2007–2011 | 13421-98J00 | Superseded by 13421-98L00 |
| Suzuki | DF300Z | 300 HP | 4-Stroke | 2007–2011 | 13421-98J00 | Superseded by 13421-98L00 |
Technical Specs
- Product Type
- Throttle Body Gasket
- Installation
- OEM replacement
- Fuel Type
- Gasoline
- Dimensions
- 15.5 cm W x 15.0 cm L x 0.4 cm H
- Weight
- 0.01 kg (0.022 lb)
- Warranty
- Standard manufacturer warranty
What’s in the Box
- 1 x Gasket, Throttle Body (Replaces 13421-98J00/13421-98L00)
Installation Notes
- Ensure the engine is off and has cooled down completely. Disconnect the battery for safety.
- Locate and access the throttle body assembly. You may need to remove the engine cowling and other components.
- Carefully disconnect any sensors, hoses, or linkages attached to the throttle body.
- Remove the mounting bolts holding the throttle body to the intake manifold.
- Gently detach the throttle body. Remove the old gasket and any remaining sealant or debris from both mating surfaces.
- Clean the mating surfaces thoroughly with a suitable gasket remover or solvent. Ensure they are clean, dry, and smooth.
- Position the new gasket correctly onto the intake manifold. Do not use sealant unless specified by the manufacturer.
- Reinstall the throttle body, ensuring it is aligned with the gasket and dowel pins.
- Tighten the mounting bolts in a crisscross pattern to the manufacturer's recommended torque specifications.
- Reconnect all sensors, hoses, and linkages. Reinstall any other components that were removed.
- Reconnect the battery. Start the engine and check for any air or fuel leaks around the throttle body.
Troubleshooting & FAQ
How do I know if this gasket fits my Suzuki engine?
This gasket is specifically designed for Suzuki 300 HP 4-Stroke models DF300AP, DF300T, and DF300Z from years 2007-2012 and later. Please verify your exact model and year by checking the compatibility table on this page. It directly replaces OEM part numbers 13421-98J00 and 13421-98L00.
What are the signs of a bad throttle body gasket?
Common symptoms of a failing throttle body gasket include a high or erratic idle, a vacuum leak (often causing a hissing sound), a check engine light with lean or vacuum-related codes, and poor engine performance or hesitation.
Is this a genuine Suzuki OEM part?
No, this is an aftermarket part. It's engineered to meet or exceed original equipment manufacturer (OEM) specifications for fit, form, and function, providing a reliable alternative at a better value.
Do I need to use sealant with this gasket?
In most cases, this gasket is designed to be installed dry without any additional sealants. Always consult your engine's service manual for the specific procedures and recommendations for your model. Applying sealant where it's not required can sometimes cause issues.
What is the difference between part 13421-98J00 and 13421-98L00?
Part number 13421-98L00 is the newer, updated version that supersedes the older 13421-98J00 part. They are functionally identical and interchangeable. This gasket replaces both.
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.
