Small Engines (Lawn Mowers, etc.): my 2006 snapper B&S 12.5HP rear engine rider, work bench, appropriate boxes

Question
well i was cuting grass the other day and i was all most done when the engine of my 2 year old snapper rear engine rider just started racing "really loud". So i shut it off immediately. So first i checked the air filter. After i cleaned it up, i started it up again and it started again. So then i checked the oil and it was low, so i put so more in it.( when i check the oil there was smoke coming out of it. I let it sit a while before i started it again. When i did it still was making that loud race noise. Then soon it wouldnt even start. So please tell me that i didnt blow the engine.  

Answer
Hello Kyle:

There is a Possibility that the Engine May have Blown. That will Depend on How Many Times it was Allowed to Over Rev and How Long that Over Rev was. You can View a Breakdown/IPL of the Engine at this Site Addy; http://www.briggsandstratton.com/maint_repair/manual_and_more/doclist.aspx?categ... and Enter the Model Numbers (XXXXXX) and the First 4 Type Numbers (XXXX) in the Appropriate Boxes and Click GO. Then Select Download PDF. I Sugggest you do the Following: 1- Check the Governor Spring. It May have Broken or Jumped Off the Governor Arm or the Throttle Control Assembly. 2- Since the Engine will No Longer Start, I Suggest you; A- Check the Compression Again. B- if the Compression is Above 90 PSI, then 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 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. 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.** The Following is an Instruction File I Made for Making the Governor Adjustment. Any Input is Appreciated.  If you Removed/Loosened the Governor Arm to Remove the Carburetor, then Reset the Governor. **To Reset the Governor; Loosen the Governor Arm Bolt and Turn the Governor Shaft Clockwise Until it Stops. Using the Governor Arm Hold the Carburetor to Full Throttle. Now with the Shaft Full Clockwise and the Governor Arm and Carburetor Held at Full Throttle, Tighten the Governor Arm Bolt. If the Engine Still Runs Full Throttle, then Reverse the Rotation of the Governor Shaft, but Still Hold the Carburetor at Full Throttle with the Governor Arm. If it Still Runs at Full Throttle, then Check the Internal Governor.** 3- If the Compression is Below 90 PSI, then I Suggest you Consider Doing a Re-Ring on the Engine. This is a Simple Repair and the Special Tool Required is Approximately $30.00. 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