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10.5 horse week to no spark. New ignition mod, checked

Customer Question
keyway. isolated stop switch. Spark...
10.5 horse week to no spark. New ignition mod, checked keyway. isolated stop switch. Spark gets weaker with each rotation?
Submitted: 1 year ago.Category: Small Engine
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Answered in 1 minute by:
6/20/2016
Technician: JohnF2015, Technician replied 1 year ago
JohnF2015
JohnF2015, Technician
Category: Small Engine
Satisfied Customers: 1,179
Experience: Owner/Service Technician at S & J Small Engines
Verified

Hi, my name is***** will be assisting you.

What did you set the gap at on the ignition coil when it was replaced?

Is this an electric start?

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Customer reply replied 1 year ago
I set it with the card supplied by briggs. no it is not electric start.but I am using a drill to turn it over
Technician: JohnF2015, Technician replied 1 year ago

So it is firing all the time but just seems to get weaker the more that you turn it.

I am to think that it could be due to the compression release not working properly so that the engine does not crank over as easy as it should. The first thing that I would check is the valve adjustments, make certain that both valves are set at .004 inches when the engine is cold. If the adjustments become to far out it can cause the engine to crank slowly which will cause poor spark since the flywheel isn't passing the ignition coil properly to provide a good spark.

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Customer reply replied 1 year ago
it is turning over quick enough because I have the spay plug removed. in four rotations there is no spark.
Technician: JohnF2015, Technician replied 1 year ago

What happens if you remove the small ground wire from the ignition coil that plugs onto it? Does it change the performance of the ignition coil, will if fire longer?

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Customer reply replied 1 year ago
no that was the first thing I tried
Technician: JohnF2015, Technician replied 1 year ago

If it still stops firing with the small ground wire unplugged from the ignition coil then it has to be a bad coil. I would at that point return it to place of purchase for a replacement, just let them know what it is doing and they should replace it to you at no charge.

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Customer reply replied 1 year ago
that I did . this is the 2nd one
Customer reply replied 1 year ago
any ideas?
Technician: JohnF2015, Technician replied 1 year ago

Only other thing would be if you are mounting the ignition coil upside down it would cause you problems. Make certain that the ground terminal is toward the block not pointing out toward the blower housing.

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Customer reply replied 1 year ago
sir I have it mounted correctly. could it be a weak magnet on the flywheel
Technician: JohnF2015, Technician replied 1 year ago

Will the magnet hold a medium sized screwdriver to it without any problems? If so then it is not likely the magnet. It would be odd for the magnet to work sometimes and not others.

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Customer reply replied 1 year ago
it seams to I amjust at a loss at this point
Technician: JohnF2015, Technician replied 1 year ago

If you are getting a spark for a moment and then it goes away this tells me that the ignition coil is bad or going open after only firing a few times. It is odd that you would have two back to back that would do the same thing however it is not impossible. Briggs did change the manufacturer that is making the coils for them and I have seen some issues similar to this from some of the other coils they supply.

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