Mercruiser Distributor Sensor Failure

Find distributor assemblies components including module sensors pick up coils pole pieces for your mercruiser stern drive using the application chart from the mercury quicksilver catalog. If 12 volts is present remove the coil spark wire from the distributor and connect it to a spark gap tester to ground. There are 2 other boats at my marina with similar engines that were tuned up at the same time.

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Replaced the distributor cap with a new mercruiser cap and had same issue again 2nd time out.

Mercruiser distributor sensor failure.

Crank the engine and check for spark. We are all experiencing similar problems. If there is spark replace the ignition sensor in the dist. My mechanic has been buying his parts from kellogg wholesale marine in ct.

If you have no spark there are several things which can be at fault. I have a 3rd cap now with the same problems. Make sure the other end of the tester is attached to a good clean ground. Key to on and strike the white green lead to ground.

Ignition sensor kit 18 5116 1 ignition pick ups replacement for mercruiser thunderbolt distributor on 4 3l 5 0l 5 7l 7 4l 8 2l engine 87 91019a2 87 91019a6 87 892150q02 87 861780q4 47 99 47. Remove the main coil lead from the center of the distributor cap and install the spark tester. If you own a late model mercruiser engine in your boat you re almost guaranteed to run into one of these common problems. Remove the white green lead from the dist.

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