I dont know if this is a feature, or just how it operates but when its under a load it only goes in single ram pump mode. before buying i had read other reviewers being upset that it only works in single ram mode, and when i used it to lift a boat outdrive (150 lbs) with my engine hoist, it did seem to only work in single ram mode when under a load. this is fine for me since the speed only matters to me to take up the slack in the ram until it starts lifting. time will tell if it holds up
Vevor Customer 
