Small Engines (Lawn Mowers, etc.): Stihl chainsaw runs rough when hot, solid state coils, solid state coil

Question
John,  I have seen where you have answered a few questions on Stihl chainsaw ignition issues.  My questions in response to some of your other responses.  You mentioned that a saw that runs very rough (missing) after heating up can be due to bad points and condensor. I just had this saw reworked at dealer, put in new points and condensor, carb kit, fuel lines but when I got it back same problem. It ran much better in starting and idle when I first started it but once it got hot it ran very rough.  Could the coil cause this same problem?  Also would you recommend converting this saw from points/condensor to solid state coil?  Is this a complicated process?  I am a fairly mechanically knowlegeable person, just didn't have the tach and timing stuff to set points and carb on small engine, done many autos.  The saw is an older model 028.  Love the saw and would like to repair if possible.  Just spent almost $200 to get this work done and hate to send it back to get the coil replaced now, especially if it's not that big of a job.  I have found the Solid State coils on the web for about $45.

Thanks,
Robert


Answer
Hello Robert:

>>I Always Suggest Replacing the Point Set with Solid State Ign.
>>Actually, the New Point Set can Still be the Cause of this Problem. A New Condensor can Always be Bad and Cause Problems, that Why I like the Solid State Ign Modules/Coils.
>>For the Price, I Suggest you Purchase the Solid State Ign Coil and that should Correct you Running Rough Problems.
>>The Solid State Ign Coil will Replace the Old Coil. You Do Not even have to Remove the Flywheel or the Point Set Under the Flywheel.
>>All you have to do is Cut the Wires Leading to the Point Set Under the Flywheel and Attach the Wire from the Cut Off Switch to the Solid State Ign Coils Spade Connector and you have Changed the Saw from Point Set to Solid State Ign. The Ign Coil is Grounded to Stop it from Firing the SPark Plug. There is No Voltage going to the Solid State Ign Coil, Just the Grounding Wire.
>>The Ign Coil is Gapped .015in from the Flywheel.
>>The Following is a Basic Instruction File I made for Setting the Coil/Armature/Magneto Gap on Small Engines. Any Input is Appreciated.
>>***Anytime a Magnet that is Set to the Correct Distance from the Armature/Ign Coil/Magneto Pickups, the Armature/Ign Coil/Magneto will Fire the Plug if it is Good. The Armature/Ign Coil/Magneto Gap should be .015in (for Chainsaws) and .020in (for Mowers) between the Flywheel and the Armature/Ign Coil Pickups. You can Use a Side Panel from a Drink Carton (Mt Dew, Pepsi, ect) and Place it Between the Flywheel and the Armature/Ign Coil. Allow the Magnets on the Flywheel to Pull the Armature/Ign Coil Together and then Tighten the Armature/Ign Coil/Magneto Bolts. Carefully Turn the Engine while Pulling the Cardboard Out from between the Armature/Ign Coil Pickups. The Armature/Ign Coil/Magneto is Now Properly Set.***
>>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