SEI 90-205-03K - SE205 Lower Unit Installation Kit
SEI 90-205-03K - SE205 Lower Unit Installation Kit
Sterndrive Engineering
250 in stock
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SEI 90-205-03K - SE205 Lower Unit Installation Kit
Planning the mounting hardware alongside an SE205 lower-unit replacement helps keep the service parts list clear. SEI 90-205-03K is the installation kit listed for the SE205 Mercury-outboard replacement family. Hardin Marine’s itemized listing identifies five mounting nuts and five mounting-nut washers, distinguishing this hardware package from a lower unit, anode kit or shift-shaft kit.
Part Specifications
- Part Number: 90-205-03K
- Component: SE205 lower-unit installation kit
- Application Family: SE205 Mercury-outboard replacement lower units; verify the specific installation
- Mounting Nuts: Quantity 5, reference 98-205-12
- Mounting-Nut Washers: Quantity 5, reference 98-205-83
- Contents Source: Hardin Marine’s itemized listing for this kit
Confirm Fitment Before Ordering
Use the parts diagrams available on our website to identify the correct installation hardware. Alternatively, send us your engine model and serial number by email, text or live chat, and we’ll confirm fitment before ordering. Include the installed or replacement SE205 lower-unit identification so the kit can be checked against the actual assembly.
Additional Information
- Vendor: Sterndrive Engineering (SEI)
- Part Number: 90-205-03K
- Kit Contents: Five 98-205-12 mounting nuts and five 98-205-83 washers, according to Hardin Marine’s itemized listing
See the related SE205 replacement lower-unit listing to identify the required assembly configuration. This installation-kit listing is for the hardware package, not the lower unit itself.
Installation Notes
Refer to the applicable engine service manual and SEI installation documentation for hardware selection, mounting requirements and tightening specifications.
Frequently Asked Questions
Q: What is listed inside 90-205-03K?
A: Hardin Marine lists five mounting nuts, reference 98-205-12, and five mounting-nut washers, reference 98-205-83.
Q: Is a replacement lower unit included?
A: No. This is the SE205 installation-hardware kit; the lower-unit assembly is a separate listing.
Q: Does this kit establish which SE205 lower unit fits my engine?
A: No. Confirm the engine serial number and the required lower-unit configuration separately, then match the installation hardware to that assembly.
Q: Are gaskets, seals or anodes part of the itemized contents?
A: The itemized seller listing specifies mounting nuts and washers, not those additional components. Do not assume contents from a different SEI installation kit apply here.
Q: Are hardware material and thread dimensions confirmed?
A: Those specifications are not established in the itemized source used here. Select by the verified kit and component references, and contact us if the installation requires further confirmation.
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.