Description
Product Overview
The STS Parts 16‑tooth starter pinion kit is engineered as a direct OEM replacement for Tecumseh engines such as TVM125‑TVM140, HSK50‑HSK70, and H50‑H70. Each kit includes a precisely machined 1.28″ gear OD, 1.283″ overall length, and a retainer ring sized 0.354″ ID / 0.61″ OD. Constructed from hardened, wear‑resistant steel, the pinion delivers consistent torque transfer and resists stripping under repeated start cycles.
Usage
Designed for snowblowers, lawn mowers, generators and other small‑engine equipment, this pinion kit restores smooth starter engagement in harsh conditions. Install the kit when you notice sluggish cranking, grinding noises, or a failure to start. Verify engine model compatibility before purchase to ensure a perfect fit.

Why Choose Us
STS Parts combines decades of small‑engine expertise with rigorous quality control. Each pinion undergoes dimensional inspection and heat‑treatment testing to meet or exceed OEM specifications. Our kits include all necessary components, eliminating the need for additional parts, and are backed by a satisfaction guarantee.
Key Features
- Exact OEM dimensions for seamless installation and reliable engagement.
- 16‑tooth hardened steel gear provides superior torque transfer.
- Compatible with a broad range of Tecumseh engine models.
- Durable retainer ring prevents gear slippage during high‑load starts.
- Includes all hardware needed for a complete starter repair.
FAQ
Which Tecumseh engine models are compatible?
The kit fits TVM125‑TVM140, HSK50‑HSK70, H50‑H70, HH60, HM70‑HM100, OHM90, OHSK90‑OHSK120 and similar models. Always confirm your engine model before ordering.
Do I need additional tools to install the kit?
Standard hand tools such as a socket set, screwdriver and pliers are sufficient. The kit includes a retainer ring and mounting hardware.
How does the wear‑resistant material improve performance?
The hardened steel gear resists tooth wear and stripping, extending the service life of the starter and reducing the frequency of repairs.
Can this kit be used on gasoline generators?
Yes, any small engine that uses a Tecumseh starter drive with the listed part numbers can benefit from this replacement pinion.
What is the warranty on this product?
STS Parts offers a one‑year limited warranty covering manufacturing defects. Contact our support team for assistance.





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