Genuine Tohatsu Power Head Gasket Set MD70B MD90B 3T9-87121-6

Genuine Tohatsu power-head gasket set for selected MD70B and MD90B TLDI outboards. It is intended for major power-head service where the engine catalogue specifies part number 3T9-87121-6.

Key Features

• Genuine Tohatsu OEM power-head gasket set
• Grouped sealing components for engine overhaul work
• Specified for selected 70 hp and 90 hp TLDI power heads
• Direct service kit when 3T9-87121-6 is listed

Technical Specs

• Brand: Tohatsu
• Part type: Power-head gasket set
• Tohatsu part number: 3T9-87121-6
• Current formatted reference: 3T9871216M
• Engine type: TLDI two-stroke outboard
• Condition: New genuine OEM set

Compatibility / Fitment Guide

• Tohatsu MD70B applications using 3T9-87121-6
• Tohatsu MD90B applications using 3T9-87121-6
• Parts catalogues identify this set on relevant 2006–2010 MD70B/MD90B assemblies; verify the exact serial range

This is not a generic gasket set for all 70–90 hp engines. Confirm the number in the assembly/kit diagram.

Part Number Cross Reference

• Current Tohatsu number: 3T9-87121-6
• Tohatsu formatted reference: 3T9871216M
• Supersedes earlier 3T9-87121 revisions on applicable models; confirm by serial number

Frequently Asked Questions

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

Does it fit MD75?
No MD75 fitment is asserted without confirmation from the exact parts catalogue.

Does it include bearings or piston rings?
No. It is a gasket set; internal hard parts are purchased separately unless explicitly listed.

Should it be professionally installed?
Yes. Power-head overhaul work requires workshop-manual procedures and measurement checks.