How to test for spark without cranking engine ?

carlos515

Petty Officer 2nd Class
Joined
Aug 23, 2020
Messages
167
Is it possible to test my Thunderbolt IV without cranking engine? I went to start the engine and found my carb leaking. But had no fuel on plugs . I will rebuild the carb , but i think I should check my ignition also.
I can't just crank the engine because of my new flat tappet cam. So I am at a lost as to how to check the ignition system.

Just found how to test system........In Adults Only......Sorry should have checked first.
 
Last edited:

carlos515

Petty Officer 2nd Class
Joined
Aug 23, 2020
Messages
167
I tested the ignition and rebuilt the carb. She sounds good at 2000 rpm.
 

poconojoe

Lieutenant Commander
Joined
Sep 10, 2010
Messages
1,966
That's going to be a problem. How are you going to start it without cranking it?
Yeah, I was wondering the same thing.

Maybe he has some new fangled instant running engine that doesn't need to crank first. :D
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,593
as long as you prime the oil system, used assembly lube during the build and pre-filled the lifters with oil, you can crank it. however based on post #4, its running.
 
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