The Genuine Tohatsu Lower Crankshaft Oil Seal 3T9-00121-0 is an original replacement seal measuring 35 × 58 × 9 mm, designed for selected Tohatsu two-stroke TLDI outboard motors. Fitted to the lower crankshaft area, it helps maintain crankcase sealing and prevent unwanted air or oil leakage. Ideal for crankshaft servicing, powerhead rebuilding and replacing deteriorated seals, this genuine OEM component provides the specified fit for compatible engines.
Oil Seals & O-Rings (Tohatsu)
Lower Crankshaft Oil Seal 35 × 58 × 9 mm – 3T9-00121-0
Brand: Tohatsu
SKU: 3T9-00121-0
$30.85
Key benefits
Key Benefits
- - Genuine Tohatsu OEM replacement oil seal.
- - Factory-specified dimensions of 35 × 58 × 9 mm.
- - Designed for the lower crankshaft sealing position.
- - Helps maintain crankcase pressure integrity.
- - Suitable for selected TLDI 70HP–115HP outboards.
- - Ideal for engine rebuilding and crankshaft repairs.
- - Sold individually, not as a complete seal kit.
Compatible Tohatsu Outboard Motors
- 2-Stroke TLDI Outboards
- - MD70B – 70HP
- - MD75C2 – 75HP
- - MD90B – 90HP
- - MD90C2 – 90HP
- - MD115A – 115HP
- - MD115A2 – 115HP
Cross-Reference & Superseded Part Numbers
- Genuine Tohatsu References
- - 3T9-00121-0 – Original OEM part number.
- - 3T9001210M – Genuine Tohatsu ordering number.
Suitable Applications
- - Lower crankshaft oil seal replacement.
- - TLDI powerhead rebuilding.
- - Crankcase sealing repairs.
- - Engine overhaul and restoration.
- - Replacement of damaged or hardened crankshaft seals.
- - Repairs to confirmed crankcase air leaks.
Signs the Crankshaft Oil Seal Needs Replacing
- - Crankcase air leakage confirmed during pressure or vacuum testing.
- - Hardening, cracking or deterioration of the seal lip.
- - Visible oil residue around the lower crankshaft sealing area.
- - Damaged or distorted seal.
- - Unstable idle or poor engine operation caused by a confirmed crankcase sealing fault.
- - Seal damage discovered during powerhead dismantling.
Shipping
Ships Australia-wide