Aftermarket replacement gasket for Grasshopper part number 420340 (axle housing gasket). It is designed as a cost-effective alternative to the original for older, discontinued Front Mount models.
A worn gasket can allow leaks and contamination into the axle housing. This aftermarket gasket is made to match the original shape and mounting pattern for a proper seal on compatible machines.
Compatible Models (Legacy / Discontinued)
Fits the same models as the original Grasshopper 420340 (per parts catalogs):
- 612-614-616 (approx. 1991)
- 718 (1989–1991)
- 718K-720K-725K (1989–1991)
- 720 ONAN (1991)
- 721-718D (1988–1991)
- 721-725 (1990–1991)
- 721D (1991)
Note: These are discontinued models. Always verify fitment with your mower’s serial number and parts diagram before ordering. Aftermarket parts are not guaranteed to match every OEM tolerance.
Key Features
- Aftermarket replacement for Grasshopper 420340
- Matches the original axle housing gasket shape and bolt pattern (Eaton 770 style)
- New condition
- Sold as a single gasket
- More affordable alternative to genuine Grasshopper parts
Installation Tips
- Thoroughly clean and inspect both mating surfaces before installation.
- A gasket installed over a nicked, pitted, dirty, or contaminated surface will not seal properly.
- Do not use sealant unless specified in your service manual.
- Follow the correct torque sequence for your model.
Disclaimer: This is an aftermarket part, not a genuine Grasshopper OEM part. Fitment is based on the original part number and published catalogs. Verify compatibility for your specific machine.