QuestionHi John, its me again with the briggs and stratten model 31c7070154E1. I'm the one who replaced the alternator and then still had trouble. I followed your advice and replaced the key and it now works except the throttle doesn't work, it doesn't idle. I thought I put the linkage back together the right way for the throttle but the throttle control only controls the choke. Can you tell me how its works or can you refer me where I can get a diagram of the carberator linkage. It has 2 steel control rods, 1 for the throttle and 1 for the choke that seems to be controlled by the throttle. Thank you so very much again.
AnswerHi Again Ed:
>>I Hope All is Well With You and Yours.
>>The Choke Link (#216)is a Solid Link that is Curved on 1 End.
>>The Curved End is Designed to Catch the Choke Lever (on the Throttle Control Bracket) when the Throttle is Put in the Choke Position.
>>This Linkage Does Not Attach to the Throttle Control Bracket (#222), but Rests in the Slot in the Control Bracket where it is in the Choke Open Position Until the Throttle Control is Moved enough to Catch the Looped End and Pull the Linkage and Close the Choke.
>>The Carburetor Throttle Control Linkage (#202 or 232)is Attached to the Governor Arm (#227) and the Carburetor Throttle Control Plate (this is the Flat Plate on the Carburetor that Moves the Throttle Control Valve) and is Attached to the Top of the Governor Control Arm.
>>There is a Spring (209) that Attaches to the Lower Hole in the Governor Control Arm and to the Lever on the Throttle Control Bracket that Moves as you Move the Throttle Cable Slide (where the Throttle Control Cable attaches).
>>The Spring Pulls the Governor Control Arm and as the Spring Tightens, the Governor Control Arm will Move and Pull Open the Carburetor Control Valve and when Pushed/Pulled.
>>These Instructions may Not be Exact, but they should Help you get the Linkage Attached Correctly.
>>The Following is a Simple Explanation of How the Governor Functions. **This Engine has the Mechanical Governor.**
>>The Governor System behaves like an Unending Tug of War between One of Two Governor Springs, which Pull the Throttle Toward the Open Position, and a Spinning Crankshaft, which Tries to Close the Throttle. When the Load on the Engine Increases - a Typical Example is when you Move your Running Lawn Mower from the Driveway to the Grass - Crankshaft Revolutions Drop. But the Governor Spring is Still Tugging, Causing the Throttle Plate to Open. In Response, a Larger Volume of Air-Fuel Mixture Enters the Carburetor, Increasing Engine Speed to Compensate for the Increased Load. The Crankshaft Speeds Up, and the Tug of War Resumes, until a New Equilibrium is Achieved. With Each Change in Load, the Tension Between the Governor Spring and the Load Brings about a New Equilibrium, known as the Engine's Governed Speed. Neither Side Wins until the Engine is Shut Off. At that Point, without the Crankshaft Spinning, the Governor Spring Pulls the Throttle to the Wide-Open Position. Two Types of Governors are Common on Small Engines - Mechanical and Pneumatic.
>>Thanks for Using All Experts and I Hope you and yours have a Nice, Wonderful and Prosperous Life.
>>As Always, 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
