QuestionI have a 8HP Yard Machine snow blower that is 7 years old but used only once a year at most. For the last three years the snow blower stalls after 30 minutes of use. If you wait about 20 minutes it will run for about 10 mintues before stalling again. After each subsequent wait it runs shorter and shorter until it won' start unless you wait hours. There is no back fire it just stalls out. The weird thing is this only happens when it is being used to move snow, heavier the load shorter the run time. During the off season I fill it up with gas and let it run completely out of gas - over 2 hours without stalling.
I have taken it to a repair shop last year and they filled it up with gas and let it run for hour plus without an issue. It seems to only stalls if being used. I have checked the carb bowl and it is clean. It has a good spark plug and I have both loosened and removed the gas cap during use to make sure there is enough air flow and it still stalls. I have ran it with "gum out" and still no change. Runs fine when idling but stalls when being used. The only other thing is when it has ran in the idle state to check for the stall it is always warmer out than when being used for snow. I did this during the fall.
The unit is like new, very little used over the years. I drain the gas each season and run it out to make sure nothing left. Fresh oil every year.
Any suggestions?
Thanks.
AnswerHello Steve:
>>If you Check for Fire at the Plug as Soon as the Engine Stalls; is the Plug Firing?
>>If No, then the Ign Coil/Module is Bad and Requires Replacing.
>>The Only Time the Engine Temperature will get Hot Enough for the Coil to Short Out is while the Unit is in Use. The Small Engine Service Center should have Known this and had a Mechanic Put a Load on the Engine when Doing the Test. Even in Hot Weather the Engine has to be Under a Load for the Engine To Heat Up enough to Cause this Problem.
>>I Suggest you Operate the Unit. As Soon as the Engine Stalls Check for Fire at the Plug. If No Fire, then Replace the Coil.>>If the Plug is Firing, then Check the Carburetor Solenoid. Sometimes the Carburetor Solenoid will Heat up and Restrict the Gas Flow Through the Jet and Cause the Engine to Stall.
>>You can View a Breakdown/IPL of this Unit at this Site Addy, http://www.smallenginepartswarehouse.com/parts.asp and Select the Shop Online Parts Look Up. Then Select the Model Tab. Then Select the OEM (MTD) and Enter the Model Numbers (Example: 31AE610E000 which is a 2000 year model unit). Then Double Click on the Model in the Results Area. Now you can Select the Section of the Unit you Wish to View.
>>MTD which Makes Yard Machines does Not include the Engine Breakdown with the Unit.
>>Send me the Model and Type or Spec Numbers Off the Engine, Please. With these I can Locate the Proper Manual and Better Assist you.
>>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
