Small Engines (Lawn Mowers, etc.): Kohler Engine Problem, assembly drawings, wheel horse

Question
Hi, I just bought a 1985 Wheel horse  312-A. It starts fine, idles and runs at full throttle fine. I started to mow and after about the third pass the engine started to bog down. I turned the PTO off and it cleared up. As soon as I would hit the PTO it would bog down again. I took the air cleaner off and when I hit the PTO it bogged down and was spitting gas out the front of the carb. and there was smoke coming out of the breather. It only did this at 3/4 to full throttle. At a lesser RPM’s it runs fine with no smoke, but of corse I can’t mow at the lower RPM’s. I took the carb and fuel pump off and put it on another tractor and mowed a half acre with no problem.  I put the carb and fuel pump off the other tractor on the new tractor and it bogged, spit gas and smoked at 3/4 to full throttle but ran fine at lower RPM’s just like it did with the original carb and pump. This is a  Kohler K301S, Spec # 47829, Serial # 1528061524. Any idea what the problem is? Thank you so much for taking the time to look into this.
Robert

Answer
Hello Robert:

>>You can View a Breakdown/IPL of the Mower at this Site Addy, https://lookup3.toro.com/partdex/default.cfm and Select Start Parts Viewer. Now Enter the Model Numbers () and Click Search. Now Select View Assembly Drawings for your Year Model.
>>You can View a Breakdown/IPL of this Engine 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 (Kohler) and Enter the Model and Spec Numbers (K301-47829). Then Double Click on the Model in the Results Area. Now you can Select the Section of the Engine you Wish to View.
>>This Engine shows it can have Either the Point and Condenser Set or an Ignition Coil (Solid State Ignition).
>>From your Description it Sounds like this Engine has the Point Set and these Require Re-Setting the Point Set Clearance.
>>The Following is the Instruction File I Made for Removing the Flywheel and Replacing the Point Set of Most Older Mower/Blower Engines. It is the Basics and if you have a Question, Please Ask. Any Input to Make this File Better is Appreciated.
>>***Disconnect the Coil Wire from the Spark Plug. Remove the Blower Housing (metal engine cover).
>>Remove the Coil.
>>Remove the Flywheel Nut or Starter Cup (Depends on the Model).
>>Now Attach a Steering Wheel Puller to the Flywheel Using the Threaded Holes in the Flywheel.
>>Tighten the Puller. Now Hit the Puller with a Hammer. Repeat this Procedure Until the Flywheel Pops Up or can be Lifted Off the Crankshaft.
>>On Some Models you Can Not Use a Puller and Must Use a Pry Bar and a Pipe Cap that is Slightly Larger than the Crankshaft. Place the Pipe Cap Over the Crankshaft to Protect it. Place the Pry Bar Under the Thick Section of the Flywheel and Pull Up Against the Flywheel. >>**BE CAREFUL  DO NOT PUT A HOLE IN THE BLOCK UNDER THE FLYWHEEL** >>Now Hit the Pipe Cap that is on the Crankshaft (covered with the Pipe Cap). Repeat the Procedure Until the Flywheel can be Lifted Off the Crankshaft.
>>*** Be Sure you have the Flywheel Torqued to the Proper Torque (I require the Model and Spec/Type Numbers Off the Engine to Provide the Proper Torque) and Set the Coil Gap to .020in.. A Cardboard Side Panel from a Drink Carton will Work for Setting the Coil Clearance.
>>The Point Set is Under a Cover Under the Flywheel. The Point Gap is Set by Slowly Turning the Engine By Hand and Holding the Point Set Plunger with your Finger. When you Feel the Plunger is at the Outer Most Point of its Movement, then Stop Turning the Engine and Using a Blade Style Feeler Gauge, Set the Point Set at .015in - .020in. .
>>On Tecumseh Engines, Set the Point Set into Place and Snug the Set Screw. Turn the Engine Until the Crankshaft Lobe that Actuates the Point Set is Fully Up on the Point Set Ear. Using a Flat Screw Driver, Open and Close the Point Set Until a Blade Feeler Gauge will Slide between the Contacts. Set the Gap to .015in and Lock the Point Set Down.  **Do Not Loosen or Move the Point Set/Stator Plate. This is Not Really Required and it is Easier if Performed the way I Described and Not the Way the Tecumseh Manuals Suggest.**
>>If the Point Set Clearance is Not Correct, you will have the Problem you Described.
>>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. 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