The ARCO R809 Relay is designed for use in Volvo Penta applications. Use with the following engine models: (1998) SX-M-MAC, MDA, MLT), 3.0GLPD, 4.3GL-E, 4.3GL-EF, 4.3GXi-F, 4.3GXi-FF, 4.3OSi-F, 4.3OSi-FF, 5.0GL-F, 5.0GL-FF, 5.0GXi-F, 5.0GXi-FF, 5.0Si-F, 5.0Si-FF, 5.7Gi-F/FF, 5.7GXi-G/GF, 5.7OSi-E/EF, 5.7OXi-E/EF, 5.7Gil-F, 5.7GXi-G, 8.1Gi-G/GF, 8.1GXl-F/FF, 8.1OSi-C/CF, 8.1Gil-G, 8.1GXil-F, DPH-A, DPH-B, DPR-A, DPH-B, EF drives, SX-M TSKs, (1998-2005) SX-M, DP-SM, (WT drives, PJX-C, PJX-S SX-M, -MACLT,-MDA, -MDB, -MHP, -MTD, DP-E, DP-S, -S1, -S2, DP-SM,-SM) XDP-B, OMC Cobras with Teleflex Pumps. It replaces the following part numbers: Sierra 18-5700, Volvo Penta 3858081, and Volvo Penta 3858809.