These replacement lift assist cylinders for Ultrex trolling motors work by increasing the effective weight of the overall lift assist system to account for the added weight of aftermarket Humminbird transducers being added to the shaft of these motors. Compatible only with both Mega 360 and Mega LIVE TargetLock, these replacement cylinders restore the original effect of the lift assist bracket in their associated motors Increases effect of lift-assist for motors equipped with both HumminbirdA(R) MEGA Live Imaging TargetLock(TM) as well as HumminbirdA(R) MEGA 360 Imaging(TM) Reduces effort required for motor stow and deploy Replaces factory standard lift assist cylinder Designed for 36V, 112lb Ultrex(TM) motors with a shaft length of 45" Compatible only with Advanced GPS enabled Ultrex motors manufactured in 2023 or later. To increase the affect of lift assist for i-pilot or i-Pilot Link Ultrex motor models manufactured prior to 2023, a MEGA Live TargetLock and MEGA 360 Ultrex Accessory Mount is required. These models will not accept an updated lift assist cylinder only. One-Year Warranty