4.3 mercruiser cranks but no spark. coil? Ignition module?

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bdubs217

Cadet
Joined
Jun 24, 2012
Messages
15
My 4.3 was running good when i had to pull it out and do some repairs. After getting everything back together i threw the muffs on to test everything and all the motor would do was crank. I am getting fuel and have checked the wiring and all connections seem clean and tight. I replaced the cap, rotor, plugs, and wires last fall. I tested for spark and nothing. I have 12v at the coil not sure where to go from here. Any Help would be great.
 
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dingdongs

Chief Petty Officer
Joined
May 29, 2009
Messages
649
Re: 4.3 mercruiser cranks but no spark. coil? Ignition module?

run through the ignition test whether you have a thunderbolt iv / v.Probably the senser gone down but generally it involves disconnecting the green/white wire and rapidly earthing to reproduce a running engine whilst holding the cable that goes in the centre of your cap with a spark tester in it if u have one.the other end has to be connected to the coil.ignition on too.look here; http://www.google.co.uk/#q=thunderb...pw.r_qf.&fp=c84ce46124a7e2b8&biw=1017&bih=530
 
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bdubs217

Cadet
Joined
Jun 24, 2012
Messages
15
Re: 4.3 mercruiser cranks but no spark. coil? Ignition module?

Thank you for the help turns out its the sensor in the distributor. I ordered the sensor and a few other parts today and hope to have it ready for labor day .
 
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