Question about 850 mercury thunderbolt

Jwred1

Recruit
Joined
Oct 17, 2020
Messages
1
I’m having cranking issues I have replaced the motor wiring harness and the CDI box it came with the coil also but I’m still not getting 200 volts to the coil primary could I have a bad trigger I don’t know what else to do no spark anywhere I’m not a mechanic I have carried it to a so called mechanic all he did was make thing worse and gave me boat back any help would be greatly appreciate
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
23,718
What year is that motor? Early 70s models have battery powered CDI. Later models have ADI ignition. You will not see voltage at the coli(s), on those models, until the trigger "fires" them. A regular voltmeter will likely be too slow to record that voltage.
 
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