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Superseded to 3861456
Shift Shaft Grommet: 25-822408
Retainer Plate 909387 / 0909387
Mercury 80hp 800 - 4cyl (1970-1972)
5hp Mercury / Mariner outboards (SN 0A885097-0G710612 using breaker-point ignition Flywheel 262-9184 (Casting # FOT0137)
MerCruiser Thunderbolt IV Ignition Amplifier Box 305 5.0L V8 V822 Stamped Piston Sets Superseded to 3861456Item Details MerCruiser Thunderbolt IV Breakerless Electronic Timing High Energy Ignition Amplifier Module (V822 Stamp) Good Condition Please Note.. The really the only thing that can happen with these is that THEY ARE WORKING OR THEY ARE NOT. The primary symptom of a bad ignition amplifier is NO SPARK AT ALL. Always make sure you connections are clean & tight while troubleshooting your existing one. Generally Found Mercruiser V8 Models (305 5. 0L)