Works great on my older ppt 2400 echo power pruner. Easy to install, no drilling required. Should have made this an upgrade years ago. The original gearcase / oil tank that came with my pruner was a disaster, always leaked oil and was a pain in the butt to put together after maintenance. Echo should have had a recall on that unit. Anyways, done ranting this gearcase replacement exceeded all my expectations. Highly recommend it.