Plate Oriented Bushing – Fits Mercury/Parsun 4/5 HP 2-Stroke & 4/5/6 HP 4-Stroke
Plate Oriented Bushing – Fits Mercury/Parsun 4/5 HP 2-Stroke & 4/5/6 HP 4-Stroke is backordered and will ship as soon as it is back in stock.
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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
Plate Oriented Bushing – Fits Mercury/Parsun 4/5 HP 2-Stroke & ...
Product Details
This Plate Oriented Bushing is an essential component for the gearcase assembly of various Mercury and Parsun outboard motors. It is designed to fit 4/5 HP 2-stroke and 4/5/6 HP 1-cylinder 4-stroke models.
This part serves as a direct replacement for Mercury part number 16165 and Parsun part numbers PAT5-03000023 and T5-03000023.
- Installs within the gearcase assembly.
- Used to properly align components in the lower casing.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 16165 |
| Parsun | PAT5-03000023 |
| Parsun | T5-03000023 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury models, this part fits the single-cylinder 4, 5, and 6 HP 4-stroke engines, as well as the 4 and 5 HP 2-stroke models.
For Parsun models, this part is compatible with their single-cylinder 4, 5, and 6 HP 4-stroke engines, and the 4 and 5 HP 2-stroke models.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | 4 HP | 4 | 2-Stroke | 16165 | |
| Mercury | 5 HP | 5 | 2-Stroke | 16165 | |
| Mercury | 4 HP | 4 | 4-Stroke | 16165 | 1-cylinder models |
| Mercury | 5 HP | 5 | 4-Stroke | 16165 | 1-cylinder models |
| Mercury | 6 HP | 6 | 4-Stroke | 16165 | 1-cylinder models |
| Parsun | 4 HP | 4 | 2-Stroke | PAT5-03000023 | |
| Parsun | 5 HP | 5 | 2-Stroke | PAT5-03000023 | |
| Parsun | 4 HP | 4 | 4-Stroke | PAT5-03000023 | 1-cylinder models |
| Parsun | 5 HP | 5 | 4-Stroke | PAT5-03000023 | 1-cylinder models |
| Parsun | 6 HP | 6 | 4-Stroke | PAT5-03000023 | 1-cylinder models |
Technical Specs
- Product Type
- Plate Oriented Bushing
- Installation
- Gearcase Assembly
- Dimensions
- 8.0" L x 10.0" W x 0.3" H
- Other Technical Attributes
- Used in lower casing assembly
What’s in the Box
- 1 x Plate Oriented Bushing (16165/PAT5-03000023)
Installation Notes
- Disconnect the battery and ensure the engine is securely mounted on a stand.
- Drain the gearcase lubricant completely into an appropriate container.
- Following the manufacturer's service manual, carefully disassemble the lower unit (gearcase) to access the internal components.
- Locate and remove the old plate oriented bushing, taking note of its exact position and orientation.
- Thoroughly clean the housing area of any old lubricant, debris, or corrosion.
- Install the new bushing, making sure it is correctly oriented and fully seated in its housing.
- Reassemble the gearcase assembly, applying new gaskets, seals, and recommended sealants as required by the service manual.
- Refill the gearcase with the correct grade and amount of fresh lubricant.
- Before returning to service, test the engine's shifting and operation in a controlled environment.
Troubleshooting & FAQ
What are the signs of a failing plate oriented bushing?
Symptoms of a worn or failed bushing can include excessive vibration from the lower unit, grinding noises during operation, difficulty shifting gears, or visible damage to the bushing upon inspection of the gearcase internals.
How do I know if this bushing will fit my specific engine year?
The best way to ensure compatibility is to match your original part number to the ones listed (Mercury 16165, Parsun PAT5-03000023). While this part fits the engine models listed, year ranges can vary. Always verify by the part number.
What is the function of this part?
This bushing is used inside the gearcase to ensure proper alignment and support for other moving components, reducing friction and preventing wear.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been engineered to meet or exceed OEM-level specifications using comparable materials. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected for quality and consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free to most locations, with expedited options available at checkout where applicable.
Warranty & returns?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our full 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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