QuestionI have a 9 hp techumseh engine on a craftsman snowblower. went to start it and it ran for a few seconds then made a loud metalic noise and stopped. I pulled the pullcord and it pulled real easy, had no compression and made a clanking noise. I pulled off the cylinder head and found the piston had a big hole in it. When I turned the shaft by hand the piston still cycled and everything seemed to move ok. My question is what do I need to do to replace the piston?
Any help would be greatly appreciated!!
thanks, Bill
AnswerHello Bill:
>>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.
>>You can View a Breakdown/IPL of this Engine at this Site Addy, http://www.outdoordistributors.com/ and Select the T. Then Select Tecumseh. Then Select Don't have Part Numbers. Then Enter the Model Numbers . Then Select your Model and Download the File for Online Viewing.
>>The Following is a Basic Instruction File for Examining the Inside of a Small Engine and will Assist you in having Access to the Governor, Oil Pump (if Applicable), Cam and Crankshaft Gear. Any Input is Appreciated.
>>**This is a Simple Process. Drain the Oil and Remove the Engine to the Work Bench with the Oil Pan Facing Up. I have a Wooden Rest that was Especially Made to Hold the Engine when in this Position.
>>Using Fine Sand Paper, Remove ALL the Rust and Debris from the Crankshaft.
>>Remove ALL the Oil Pan Bolts.
>>After All the Oil Pan Bolts are Removed; Tap Lightly on the Sides of the Oil Pan to Loosen it from the Dowel Pins.
Sometimes you May have to Use a Flat Screw Driver or Chisel Between the Oil Pan/Sump at the Areas Neat to the Dowel Pin and Loosen the Oil Pan/Sump.
>>When the Oil Pan is Removed, you can See the Governor Resting on Top of the Cam Gear.
>>****If Required: Lift Off and Replace with a New Governor. Check the Engine Block for Debris from the Old Governor and Wipe the Inside of the Block With a Rag, Until Clean. Set the Governor Shaft So it will be Resting on the Governor whine the Oil Pan is Replaced and Carefully Replace the Oil Pan. If the Crankshaft Seal Was Not Leaking, then Leave it Alone. It Should be OK. You can Easily Replace it While Mounted on the Machine if Required Later. Make Sure the Governor Stays in Contact with the Governor Shaft while Replacing the Oil Pan. Re - Mount the Engine to the Machine. Refill With Oil. Your Internal Governor May Differ.**
>>You can Use the File to Gain Access to the Connecting Rod and Piston Also.
>>The Crankshaft Does Not have to be Removed to Replace the Connecting Rod or the Piston.
>>The Cylinder has to be Honed/De-Glazed and a New Ring Set should be used when Replacing the Piston.
>>Be Sure to Wipe Clean the Inside of the Engine and Keep the Inside Clean During Reassembly.
>>The Following Addy is Supposed to be a Video of a Small Engine being Rebuilt; http://www.tarleton.edu/~mcgregor/A%20EN%202013/2013%20Labs/Reassembly/OHV.Reass...
>>You can Locate the Correct Specification (Bolt Torque, Valve Clearances, ect) for this Engine at this Site Addy; http://outdoorpowerinfo.com/engine_specs/ and Select your Engines OEM and the Specification Chart you Require.
>>If you cannot Locate the Specifications you Require, then Send me the Make, Model, Type/Specification Numbers Off the Engine, Please. With these I can Locate the Correct Manual and Better Assist you.
>>As you make these Repairs, Feel Free to Ask me Any Questions you May have.
>>If you Hit a Snag or this Does Not Correct the Problem, I Hope to be Here if You Require More
Assistance. Hope this Helps. Let me Know What Happens, Please.
>>I Hope You and Yours had a Happy Holiday Weekend and May the All Mighty Bless You and Yours. Be Safe and Happy. Thanks.
Good Luck
Respectfully
John
PS: I am Allowed to Answer 5 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
