Re: Can I tell if a mag has spark by spinning it?

Posted by Okla/Bill on February 05, 2003 at 18:28:37 from (209.240.198.63):

In Reply to: Can I tell if a mag has spark by spinning it? posted by Scott Swanson on February 05, 2003 at 14:13:05:

You can have spark and yet it be a weak spark. You can have one or more port not throwing spark, or one or more throwing a strong spark and one or more throwing a weak spark. you can have a crack in your cap, or the rotor, or a 1/2doz other things. If you have it on the tractor, get somone to crank the tractor while you hold the sparkplug which is out of the engine and hopfully on the end of some insulated pliers, and attached to the coil by the sparkplug wire. Hold the plug gainst the engine nearly, maybe a 1/16 or so of an inch away, maybe a 1 32th of an inch. If it throws a spark through the plug to the engine or where you have the plug near, and the spark is blue, you have a good spark. Do thios with all 4 ports and see what you have. MAKE SURE THE SPARKPLUG WIRE AND PLUG ARE GUARANTEED IN GOOD SHAPE. then do this with each one of your sparkplug wires one at a time in any port assuming you got good spark out of all of them, then pu each of your plugs in turn on the end of the wire. Its a basis of elimination. If your still not sure, look in the phone book under Magnetos and take it somwhere. Charge is usually around 25 00 to check it. If the internal coil is bad, then it can be 75 00, but you can bypass this by using an external car coil. If you are by yourself, and you hav another tractor handy, and a belt, you can belt ont to the other and run it in nutrial and check whatever you want for as long as you want, and , if your internal coil is bad or weak, this is good as it will in a short time, say 10 min, max start to cut out or quit running altogether as it has got hot as it would do in normal operation. Good luck

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