No Spark..... Mercruiser 3.0

Jonny20212021

New Member
Joined
13 Apr 2021
Messages
3
Visit site
Hi all,
Quick backstory, engine started then cut out, I burnt the starter motor whilst attempting to restart. Have replaced the starter motor and turns over fine.
I've started with the basics, spark fuel and air.
Ive pulled the plugs and tested against ground and am getting no spark.
I tested the cable to the ignition coil, I WAS getting 12v, cleaned the dizzy etc 12v WAS coming out of the coil through the bottom connectors. Just before I decided I'd need a new dizzy I tested the quick clip HT lead (the one that goes from the ignition coil to the top of the dizzy ) nothing. I tested the feed into the ignition coil again and I'm getting no reading. I assume it's a bad connection somewhere. I've traced the line and it looks like it goes straight into the large wiring harness connector so can't see where a bad connection would be.
I've taken off and bypassed the kill switch.
Anyone any thoughts?
 
There will be a purple wire on the + terminal of the coil, if you don’t have 12v there then it could be a bad connection on the main harness connector on the engine or up at the ignition switch. Try hot wiring the coil with a 12v feed from the battery to see if it has a spark when you crank the engine. If it has a feed connect a test light to the - terminal of the coil and crank, it should flash on and off indicating the coil is being switched by the module, if it doesn’t then its pointing towards a module fault, not sure which model you have as there are several ignition system types on the 3.0
 
Top