Small Engines (Lawn Mowers, etc.): lawnboy insight snowthrower runs for 5 minutes, question pool, safety switches

Question
My snowthrower runs for 5 minutes, then stalls out. I let it sit for about 10 or 15 minutes, and again it runs for 5 minutes. It is a fresh gas/oil mix. What's the problem?

Answer
Hello Pat:

Sorry for the Delay. This Question was Located in the Question Pool and I can Only Answer Questions from the Question Pool when I am Not Answering Questions here or at the Other Site I Answer Questions at. From your Description it May be 1 of the Following. 1- Did you Check the Exhaust Port and Muffler? If Either of these are Restricted with Carbon Deposits, then the Engine May Run at Idle but will Flood when you Try to Rev the Engine above Idle. The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated. **Remove the Muffler and Make Sure the Exhaust Port is Clear. If it is, then Try to Start the engine with the Muffler Off. If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required. 2- The Coil is Heating Up and Not Firing the Plug. The Following is a Basic Instruction File I Made for Checking the Coil/Ign Coil/Magnetron on Small Engines. Any Input is Appreciated. **To Check the Ign Coil; Remove the Spark Plug/s. Wrap a Wire Around the Threads of the Plug and Attach the Other End of the Wire to the Engine Block. Remove the Blower Housing (metal engine cover). The Wire that is Connected to the Coil/Ign Module from the Shut Off Switch needs to be Removed (unplugged) from the Coil/Ign Module. Now Check for Spark at the Plug. If Spark, then the Shut Off Switch or the Wire is Bad. If Still No Spark, then the Coil/Ign Module is Bad. If there are Safety Switches on this Unit and the Coil is Good; you Need to Check the Safety Switches for Being Bad Also.** 3- The Gas Tank Cap is Not Venting the Tank Properly. The Cap Allows Air in, but Not Out. If Not Allowing Air In, then Replace the Cap. 4- The In Tank Fuel Filter Requires Replacing. The Following is a Basic Instruction File I made for Replacing the Fuel Lines and the Filter on Chain Saws and Trimmers. Any Input is Appreciated. The Fuel Line is Pushed and Pulled (I Use Long Needle Nose Pliers) Through the Small Hole Until the Hose is Out the Fill Hole about a 1/2". Then Attach the Filter and Pull the Hose Back Until the Filter Lays at the Bottom of the Tank Just Below the Fill Hole or so it is in the Bottom of the Tank and will Rest in the Fuel Mix when Turned at Common Angles the Unit May be Turned to During Operation. **Hint: Use Plenty of Spray Lubrication at the Small Hole as you are Feeding in the Hose. It Slides Easier.** If you Hit a Snag or this Does Not Correct the Problem,  I am Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. Have a Happy Holiday Season and May the All Mighty Bless You and Yours. Be Safe and Happy. 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

Hello Again Pat:

There is 1 Item I Failed to Include in the List of Causes. If the Rings Do Not Expand with the Cylinder/Jug, then the Problem you Described will Occur. I will Make Changes to the Instruction File I Sent you. Sorry for the Any Inconvience. Thanks for using All Experts.

Respectfully

John