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Inconsistent Spark


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#1 Bob IN OFFLINE  

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Posted January 13, 2014 - 08:57 PM

Im working on a rj 58 with a 4 hp kohler. It has spark but its not very consistent. Would this be caused by points? I cleaned them and also the magnets on the fly wheel. Also cleaned the contacts on the coil. I really hope its not the coil. Maybe ill try and clean them better. It may just be the person working on it but its getting frustrating. :wallbanging:


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#2 Gtractor ONLINE  

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Posted January 13, 2014 - 09:13 PM

It could be any number of things. My suggestion is start over and check and clean every contact and ground.  Sometimes corroded points are hard to get clean - especially if you have poor vision like I do.  :mad2:


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#3 trowel OFFLINE  

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Posted January 13, 2014 - 09:17 PM

Sounds like something is loose or not making good contact. Decaying coils do that too but usually when hot.


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#4 nbent OFFLINE  

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Posted January 13, 2014 - 11:51 PM

it may also be the condenser my friend had a 66 chevy with a 292 that happened when the condenser went bad 



#5 MH81 ONLINE  

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Posted January 14, 2014 - 02:19 AM

Ground and condenser are my starting suggestions if you're sure the points are behaving.

One other thought, where are the point driven? Is it off the crank, is there any play in the crank? Could be just enough to cause the points to misbehave.
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#6 JDBrian OFFLINE  

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Posted January 14, 2014 - 06:14 AM

Points can be fussy. Remove them and get them in a good light so you can get a close look. One other issue is that you could have a worn or cracked spot on the plug wire somewhere and the spark is arcing over to the engine chassis.


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#7 boyscout862 ONLINE  

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Posted January 14, 2014 - 08:07 AM

Other possibility is an intermittent short in a 12 volt wire. Sometimes at the points cover. Good Luck, Rick


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#8 OldBuzzard ONLINE  

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Posted January 14, 2014 - 08:21 AM

It's also possible that it's a bad plug.
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#9 Walkinman1 OFFLINE  

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Posted January 14, 2014 - 08:56 AM

I had that same issue the other day on a Kohler and it turned out to be the coil, even without getting hot it would work for a few seconds then quit.
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