B159 Mercury Quicksilver 15899A 1 - Ignition Module. Ignition Module Stamped V-8 22 Fits: MCM/MIE 5.0L & 5.7L & MCM 525 SC engines w/ Thunderbolt IV ignition. NLA-No Longer Available. NOS-New Old Stock is in the original packaging. Comes as pictured. Please verify the part number is correct for your application. Thank you for shopping Madlin Marine Parts.