Click to expand Tap to zoom Aftermarket Advance 56104243 by Aftermarket No reviews 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Contact Us For Pricing And Availability Description Description Speed Controller. Sa40 20D, Sc1500 51D, Sc1500 X20D, Sc1500 X20R Replaces Aftermarket Advance 56104243 Fits SA40 20D, SC1500 51D, SC1500 X20D, SC1500 X20R