alpha 1 v6 4.3l mercruiser plugs have no spark turns over well 12v every where.
Make (of engine): mercruiser
Model (of engine): alpha 1
have checked kill switch ok and 12 volt curcuit
Hello, and welcome to Justanswer. My name is XXXXX XXXXX X will be helping you today. If you need clarification on something please post back here.
Mercrusier uses quite a few ignition systems in these engines. I would need your engine serial number to see which ignition system you have.
thunderbolt iv ignition engine s/n od11097
Start by disconnecting the tachometer. Pull the tach out and disconnect the grey wire on the S terminal of it. Let me know if you get spark back or not.
Degree in Marine Technology. Gas and diesel marine mechanic.
i have just done that and still no spark.
Then what you have is either a bad;
1. pickup in the distributor
2. ignition amplifier
3. ignition coil
To test it properly and not buy parts you don't need, you have to follow the troubleshooting flowchart. I have it here for you.
Attachments are only available to registered users.
Just follow the chart step by step, without jumping around, and it will lead you to the problem.
Post back with questions.