Genuine Tohatsu Oil Seal 30x45x8 MFS8 MFS9.8 3V1-00121-0

Genuine Tohatsu 30 × 45 × 8 mm oil seal used in selected MFS8 and MFS9.8 crankshaft assemblies. Fitment must be confirmed by OEM number and installation position.

Key Features

• Genuine Tohatsu OEM oil seal
• Factory-specified 30 × 45 × 8 mm size
• Used in the matching crankshaft and piston assembly
• Supplied individually

Technical Specs

• Brand: Tohatsu
• Part type: Radial oil seal
• Tohatsu part number: 3V1-00121-0
• Current formatted reference: 3V1001210M
• Size: 30 mm inside diameter × 45 mm outside diameter × 8 mm width
• Condition: New genuine OEM part

Compatibility / Fitment Guide

• Tohatsu MFS8 crankshaft applications using 3V1-00121-0
• Tohatsu MFS9.8 crankshaft applications using 3V1-00121-0
• Nissan Marine equivalents using the same Tohatsu reference
• Selected related Mercury/Mariner and OMC engines; verify with the cross-reference and engine serial number

The same dimensions alone do not prove fitment. Confirm the OEM number and seal position in the exact parts diagram.

Part Number Cross Reference

• Tohatsu: 3V1-00121-0, 3V1001210, 3V1001210M
• Mercury: 26-855681001, 855681001
• OMC/Johnson/Evinrude: 5041269

Frequently Asked Questions

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

What are the dimensions?
The manufacturer’s parts information identifies it as 30 × 45 × 8 mm.

Does it fit MFS15, MFS20, MFS25 or MFS30?
Those models are not claimed here. Verify the exact part number for the engine and installation position.

What is included?
One oil seal only.