QuestionQUESTION: I have an older ariens snowblower 4hp,i can get it running but it runs really rough,it back fire spits and sputters and then stalls.it will stall when i try to give it a little throttle as well,when i take the spark plug out after a few attemts to get it running the plug is blackdose this mean the motor is shot,i have installed a carb kit plus new points and coil pack,it has new gas and oil.HELP
ANSWER: Hello Phil:
Did you Soak the Carburetor Overnight in Carburetor Cleaner? Is the Point Set Gapped to .020in with the Engine at TDC on Compression Stroke? What is the Compression? 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. The Model Numbers May be Stamped Into the Blower Housing (metal engine cover) Above the Spark Plug. It May be the Valve Clearance Requires Resetting Also. Thanks.
Respectfully
John
---------- FOLLOW-UP ----------
QUESTION: not sure if you remember me,I just wanted to thank you once again for all the help you gave me with my snowblower.its running good now however it dose foul plugs pretty fast,i have used it 5 times and have put 2 new plugs in it.
AnswerHello Again Phil:
Thanks for the Good Words and you are Very Welcome. Is the Engine Consuming a Lot of Oil? If Yes, then Check the Crankcase Breather and Make Sure it is Operating Properly. If this is an OHV Engine, then the Head Gasket May be Blown betwen the Cylinder and the Push Tube Galley. This will Foul the Plugs with Oil. Does this Carburetor have Air Mixture Screws for the Idle Air and the Full Throttle Jets? If Yes then Reset them. ****All the Carburetor Adjustments are the Same for Lawn Mower and Trimmers. There are Several Location for the Air Mixture Screws. The Idle Air Mixture Screws are Usually Located at the Top of the Carburetor Bowl and the Top of the Carburetor Body. If the Main Air and Idle Air Mixture Screws are Side by Side on the Side of the Carburetor, then the Idle Air is the Farthest from the Engine. The Main Jet Air Mixture Screw is Located in the Bottom of the Carburetor Bowl or Beside the Idle Air Screw on the Side of the Carburetor Body. Some of the Older Model Carburetors have the Main Jet Mixture Screw Straight in from the Top of the Carburetor Body (this is Rare anymore). If you have Cleaned the Carburetor (Disassembled and Soaked Overnight in Carburetor Cleaner (I Use Gunk). Then Blow Out the Passages with Compressed Air and Install a New Kit if Required. Now Setting the Air Mixture Screws: ****Turn the Idle Air and Main Air Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Holding the Throttle Full Open, Start the Engine. Turn the Main Air Mixture Screw Clockwise Until Proper Revs are Obtained. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs. Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required. Now Set the Idle Air Mixture Screw so there is No Hesitation when Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.**** 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. 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. Thanks.
Respectfully
John
