Seller notes

Sierra Ignition Sensor for Mercruiser This is a brand name (Sierra). Not a generic sensor thats going to stop working a month later. Fits Thunderbolt Ignition V6 & V8 1981-1997 Replaces:Mercruiser Ignition sensor# 87-892150Q02, 87-861780Q4 & 87-861780A2 Mallory 9-29804 Sierra 18-51161 & 18-5724 This Sierra ignition sensor is for in your distributor(for the people that might not know). This new ignition sensor has an extra (ground)wire compared to the original because the original had grounding i...

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