All Starter Motors Honda Genuine Carbon Bush Spring Starter motor BF8 – BF30 31204-KS5-901 Mercury Mariner Starter Motor Assy 15hp – 30hp Mercury Mariner Starter Motor Assy 25hp Mercury Mariner Starter Motor Assy 45-50hp Mercury Mariner Starter Motor Assy 50hp – 60hp Mercury Mariner Starter Motor Assy 75hp – 115hp EFI Mercury Mariner Starter Motor Assy 75hp – 350hp Mercury Mariner Starter Motor Assy 8hp – 9.9hp