Power Trim Relay | Sierra 18-5704 Sierra Power Trim Relay | 18-5704 Aftermarket power trim relay with mounting tab for older Volvo Penta AQ 270 and 280 model outdrives. 20 amps resistive 15 amps inductive Single pole 5 terminal Relay for the mechanical lifting device used on Volvo Penta AQ270 and AQ280 stern drives Replaces Volvo Penta part 876037