No Spark (and yes I checked everything according to the check list)

udm328is

Petty Officer 2nd Class
Joined
Jun 6, 2010
Messages
126
Ok, so I checked everything according to the check list and still no spark. I have a Mercruiser 5.0 with the Thunderbolt ignition and after going through everything on the check list I am still stuck, Any ideas? It seems I have a fuel issue as well as it seem nothing is sparying out when I pump the throttle, but I need to get someone to look when I do it to make sure but looks like it is still dry when I do, but I'll get more into that when I read up on that I guess unless there is any chance the two issues are related.


As always thanks in advance for any help and suggestions,
Eric
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: No Spark (and yes I checked everything according to the check list)

What check list are you referring to?

Got a serial number for your engine handy, all carbed engine have had Thunderbolt ignition systems since the mid 80's.
 

udm328is

Petty Officer 2nd Class
Joined
Jun 6, 2010
Messages
126
Re: No Spark (and yes I checked everything according to the check list)

SN is 0D712714, as far as the check list I was speaking of is the one for troubleshooting engine starting system and did all those checks and everything checked out
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: No Spark (and yes I checked everything according to the check list)

The starting system has nothing to do with spark, only making the starter turn the engine over. You should have a Thunderbolt IV system, try this check list for spark problems.
Click on the picture 3 times for full size.

TB4 Troubleshooting.jpg
 

udm328is

Petty Officer 2nd Class
Joined
Jun 6, 2010
Messages
126
Re: No Spark (and yes I checked everything according to the check list)

Thanks Don,
I will try this out.
 
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