Genuine Tohatsu Lower Unit Gasket Set MD70 MD75 MD90 3T9-87321-2

Genuine Tohatsu lower-unit gasket set for selected MD70, MD75 and MD90 TLDI outboards. It groups the specified sealing components for lower-unit service on the matching gearcase.

Key Features

• Genuine Tohatsu OEM gasket set
• Prepared for the matching lower-unit assembly
• Suitable for gearcase strip-down and resealing work
• Direct service kit when 3T9-87321-2 is specified

Technical Specs

• Brand: Tohatsu
• Part type: Lower-unit gasket set
• Tohatsu part number: 3T9-87321-2
• Current formatted reference: 3T9873212M
• Engine type: TLDI outboard
• Condition: New genuine OEM set

Compatibility / Fitment Guide

How to check before ordering: the part number on your old part should be 3T9-87321-2 (or a superseding number). If you are not sure, send us your engine model and serial number (on the plate on the engine bracket) and we will confirm fitment before you order. Tohatsu often uses the same part on related models, so this list may not be complete.

Verify the engine serial number and gearcase version. The set is identified for the lower unit, not as a complete power-head gasket kit.

OEM Cross Reference

• Current Tohatsu number: 3T9-87321-2
• Tohatsu formatted reference: 3T9873212M
• Supersedes Tohatsu: 3T9-87321-0 on applicable models

Questions & Answers

Is this a genuine Tohatsu set?
Yes. This listing is for a new genuine OEM lower-unit gasket set.

Does it include every bearing and seal?
No. It is a gasket set; bearings, gears and other service parts are not included unless specifically shown.

Will it fit every 70–90 hp Tohatsu?
No. Fitment is limited to engines whose parts diagram specifies 3T9-87321-2.

Should a technician install it?
Lower-unit disassembly requires correct procedures, measurements and pressure testing, so professional installation is recommended.