Ignition Sensor - 18-5116-1 - Sierra
Price: $49.73
Save: $20.26
(28% Off $69.99)
Part # 18-5116-1
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This item is found in the following Product Families
Replaces OEM part #
  • MERCURY MARINE 87-861780Q4
  • V-6 & V-8 with Thunderbolt ignition (1981-1997) nut connectors
Average Customer Review for Ignition Sensor - 18-5116-1 - Sierra
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Mercruiser Ignition Sensor.
by John from Mashpee, Massachusetts on December 11, 2015
No Spark, TBI injector not firing. If you got a MEFI3 look in your distributor under rotor for the problem. These little modules provide the timing signal for the ECM to trigger the coil and fire the fuel injectors. Mercury has a service bulletin out on these: 2000-14 anf 200014R1. This replacement from Sierra did the trick!. Engine fired right up runs great.
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Good quick servive
by Michael from Bremen, Alabama on July 27, 2011
Helpful lady on the telephone
(2 of 3 people found this review helpful)
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Will it work with stock cap and rotor?
Yes it will work with original equipment.

My sensor is like the one on bottom with 2 wires . the one on top has 3 wires will this work? thanks?
Well we can only match up by OEM number or engine/ignition information. This for V-6 & V-8 with Thunderbolt ignition (1981-1997) nut connectors. You can call us for more information at 1-800-914-1123.

What is the black wire for, ground?
Yes, the black wire is a ground wire.

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