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Mercury 3.3hp 2003 Outboard No Spark

O

oogabooga

New member
I am getting no spark from my Mercury 3.3HP 2003 outboard. I changed the spark plug and even got a tester and even with the tester it did not light up. What would be my next steps in resolving for this? I also did a compression test and you can see the result I got below but I am not sure if this is a good result or not. I am trying to bring this outboard back to life.

J8uHQXr.jpeg
 
Find out why compression is so low and I would not worry about spark.-----Do NOT spend any $$$$ on parts until you resolve the low compression !!
 
racerone said:
Find out why compression is so low and I would not worry about spark.-----Do NOT spend any $$$$ on parts until you resolve the low compression !!
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What would be the best way to start here I have no real experience repairing these motors I am kind of learning just by watching youtube videos. I did the test based on pulling the pull cord completely 5 times and then taking the reading.
 
racerone said:
Sounds like a scored piston or bad head gasket.-----Remove cylinder head / post pictures of what you find.
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Is there a good YT video or manual I can follow to do this? I am comfortable working with the engine just need some guidance.

Thanks for your help by the way.
 
Alright, so i got it all cleaned up changed the piston ring and compression is just below 100 now so compression is fixed. But I still get no spark.

How can I figure out which part is causing the no spark issue? Can I use a voltmeter?
 
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