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Hello, I've been trying to fix a spark problem on a jlo 399.
I have spark on one side but not the other. When i put new plugs in I did get spark but the next day it was dead again.
I know the coils are good(switched sides and both work fine) I pulled the flywheel and cleaned and set the points. Both side do complete the circut when i measure resistance across the point leads.
Both leads from the poinst do produce voltage.
I am at a complete lose here as I feel this shouldnt be that hard to figure out.
Does any one know of or have info on trouble shooting/testing the magneto for this thing? Any ideas would be greatly apreciated,I scratching my head here.
There is a trouble shooting seciton in the jlo manual in the literature section of the site. It's pretty basic stuff that you've probably already tried but it may be worth a read: jlo 2 stroke manual
Click on the table of contents and then you can find the page you need.
Thanks mike,yeah i read through it.
I cleaned it up and have good spark and again... I dont get it, the wiring is all new, only thing i can think of is dirt is gounding it somehow?
Guess ill run it for awhile before i go in the backwoods!
Hey fluidude, had the same problem with my Kohler 399. Make sure that the high-voltage lead from the external coil to the plug is tight on both ends. Also make sure that the internal coils are still in good shape. Also, check that there is tension on the spring on the breaker points and the condition of the condensers. My main problem was with the points and coils. The ground could be bad too. Good luck.
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