Small Engines (Lawn Mowers, etc.): small mcullough chain saw, continuity tester, chain saws

Question
my saw suddenly has no fire to plug ,need to know what i can ck to try to resolve the problem,think something has happened to the magneto but dont know how to ck it ,i dont use it very often. it done this 1time before and started just as was about to give up.need a direction to look in.

Answer
Hello Larry:

>>The Following is a Basic Instruction File for Locating the Cause/Cure for No Fire to Plug on Trimmers, Blowers, and Chain Saws. Any Input is Appreciated.
>>Remove the Spark Plug and Wrap the Threaded Section of the Plug with Wire, then Attach the Other End of the Wire to the Engine Block. **First Make Sure the Plastic End that Snaps to the Plug is Allowing Current to the Plug. Use a Continuity Tester and Check for Continuity from the Coil Lead through the Plug Cap.** If you have Continuity, then
>>with the Plug Still Wired to the Engine and the Coil Lead Attached to the Plug; Remove the Coil Shut Off Wire at the Shut Off Switch.
>>Check for Fire. If No Fire,
>>then Remove the Cut Off Wire from the Coil (removal of the blower housing required) and Check for Fire.  Turning the Engine By Hand (giving a Quick Twist with the Wrist) is Enough to Make the Coil Fire the Plug.
>>If Still No Fire, then the Coil/Ign Module is Bad.
You can View a Breakdown of this Unit at this Site Addy;
http://www.ordertree.com/cms/parts-lookup-help/73.html and Select the OEM (McCullough) and Enter the Model Number and Click Go. If No Results, then Select the Click Here for Help. Now Scroll through the Units Listed and Locate your Model. Then Select your Model and View
the Breakdown/IPL.
>>Please, Do Not Hesitate, If you Hit a Snag, if I Missed Something or this Does Not Correct the Problem, I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Thanks.

Good Luck

Respectfully

John

>>PS: I am Allowed to Answer 10 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John