17.5 hp Briggs &Stratton running weird?

Question

I have a 17.5 hp Briggs & Stratton that acts funny, and surges after warmup. I took a video below to show you what it is doing:

http://www.youtube.com/watch?v=-Vxm2LWk6ow

WHY?!?!?!?

Also, I have new gas and a new fuel filter in it too.

Thanks a lot! And thank goodness for this site!

Also, I am not advancing or retarding the throttle at all. How do I remove the carb? Can I spray carb cleaner in it w/o removing it?

Answer 1

In the video i couldnt see if it has a fuel metering screw, if it does ( its in the bottom of the float bowl) - adjust it out a bit, if it doesnt improve, adjust it in a few turns. If it doesnt have a metering screw, im afraid you'll haveta remove and thouroughly clean the carb, which isnt as hard as you might think.
Kidd

Answer 2

A couple of things may be causing your problem. First, your governor on your engine may not be set correctly and may need adjusting. Then there is the fuel supply. If you have new fuel line and filter you have to check the carb. You cannot really clean the carb without taking it off of the engine. make sure your jets are clear and check the diaphragm. You may want to get the exact model and type off of the engine and look up the engine schematics. Become familiar with the carb and the parts involved.

Answer 3

It looks like you are playing with the throttle in the video.
Try cleaning or replacing the air filter. Clean out the carb with some spray carb cleaner.
If you are comfortable with disassembling and reassembling carburetors, then do what the next answer says, I know that will work great.

Answer 4

Spray cleaner is a waste of time and money. You should remove the carburator, disassemble it, and soak it in a good parts cleaner. Blow it out with compressed air and make sure all the passages are clear. Reassemble with a rebuild kit. It will run like new.