Ignition Sensor - 18-5116-1 - Sierra
Price: $60.95
Save: $18.96
(23% Off $79.91)
Part # 18-5116-1
SHIPS TODAY!* if ordered in 1 hr 49 mins.
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.
(1 of 1 people found this review helpful)
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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 part number is 86-90575. I believe this is the original sensor. engine # is OD848709 1993 4.3lx. Thunderbolt ignition Do you have a disrtibuter sensor to match? Thanks?
Based on the serial number to your motor yes this will work with your application. Do not recognize the 86-90575 number, but based on your application this is correct.

I also have 86-90575 engine serial#6709200 5.0L looking for replacement?
We will need to know the model of the motor. If you have the 260, 228, etc.

Do you have a two wire sensor? 87-861780A2? the tree wire sensor will not work the distance between the holes isnt the same? thank you i hope you have a two wire left?
The two wire is no longer available. That part number has been superseded to 892150Q02 which is the three wire.

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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