The Genie 27191A.S is an original factory 10-tooth sprocket designed for select Genie chain-drive garage door openers. This OEM replacement part drives the opener’s chain from the motor head, transferring torque to move the door smoothly along the rail. As a core component of the drive system, the 10-tooth sprocket helps maintain reliable, consistent operation and is commonly used when the existing gear shows wear, tooth damage, or excessive noise under load. It is suitable for residential chain-drive applications where a 10-tooth motor sprocket is specified by Genie.
Sold as a Genie service part under number 27191A.S (also referenced as 27191AS), this replacement is intended for units that require a 10-tooth drive gear; always verify compatibility with your opener’s model and parts diagram before ordering. Installation typically involves removing the opener cover, relieving chain tension, replacing the sprocket on the motor head, and re-tensioning the chain per Genie specifications; unplug power and disengage the door from the opener before service, and follow all safety precautions in the Genie service manual. No programming is required, though you may need to fine-tune chain tension and check travel limits after reassembly. This genuine Genie sprocket is an ideal replacement part for restoring proper chain engagement and dependable performance in compatible Genie chain-drive garage door openers.