Tecumseh OEM NOS Carburetor Diaphragm 630978

Keep your small engine humming smoothly with this genuine Tecumseh OEM NOS carburetor diaphragm, part number 630978. Designed to fit Tecumseh 1400-1493B series engines, this diaphragm helps regulate fuel flow inside the carburetor, ensuring proper mixture and performance. Worn or cracked diaphragms often cause hard starting, inconsistent idle, and poor throttle response — replace them with this unused, factory original part for reliable operation.

This part is New Old Stock (NOS) — unused and built to original OEM specs — making it a great choice for rebuilds, maintenance, or restoration projects. Easy to install and engineered for long life, it’s a must-have replacement part to keep your engine performing at its best.

Key Features

• ✔️ Genuine Tecumseh OEM NOS diaphragm

• ✔️ OEM part number 630978

• ✔️ Direct fit for 1400-1493B series engines

• ✔️ Improves fuel metering and carb performance

• ✔️ Ideal for repair, rebuilds & maintenance

Fits / Compatibility
Compatible with Tecumseh 1400-1493B series small engines that use diaphragm carb systems.