Small Engines (Lawn Mowers, etc.): 19.5 HP Engine Surging, craftsman model, hp engine

Question
Eric;

Thanks for your prompt reply. Yes, I do have an Air Compressor. I assume that the 2 springs you mentioned are just under the face plate on the fuel filter on the front of the Carburetor? (since I don't have a Idle Mixture Screw). Is there a step-by-step instruction on how to remove, disassemble, clean & re-assembly this type of Carburetor anywhere? 9Maybe on a B & S Web Site?)

Thanks Again,

Randy Eakes
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Followup To
Question -
I have a 3-year old Craftsman Model 917.270812 with a B & S 19.5 HP Engine that has been running fine. Recently, it started surging, running fast, then slowing down, then fast again. I have the Owner's manual, and looked at the Section on adjusting the Carburetor, but there doesn't seem to be a Idle Mixture Screw anywhere on the Carburetor? (As shown in the manual) It only has a Idle Speed Screw. If I try to adjust just the Idle Speed Screw, I can get the enging to stop surging, but the engine speeds up, and seems to run ok. But, when I increase the throttle up to high,  it still surges, when running at High speed?
Answer -
We see this problem often.  The problem is usually fixed by removing, dis-assembling and cleaning the carb with carb cleaner and compressed air.

Those carbs are very simple and you shouldn't have much trouble cleaning it. If it has a fuel pump on the carb just pay very close attention to the 2 small springs in the fuel pump.

Do you have and air compressor?
Let me know.
Eric

Answer
If you go to Brigg's website you can input your model and type number.  I believe under manuals if you select the Illustrated Parts Lists you will be able to see a breakdown of the carb.

We utilize the site for all parts these days so I know it's there.

Let me know if you can't find the site.
Eric