Battery powered (hei) high energy ignition
Mercurieser Stern Drive 805185A36, 805185A26, 805185A16, 805185A6, 805185A43, 90747A27, 90747A25, 90747A21, 90747A3, 862057A4
Uses a hall-effect type sensor to trigger ignition accurately even at extremely low rpm
Designed as a Direct replacement for Mercury thunderbolt IV ignition distributors
Fits: gm V-8 engines w/thunderbolt IV & V ignition
Part # 18-5470