Item 209 is the governor spring, Item 211 is the governed idle spring. Http:/ / / BriggsDocumentDisplay/ 18muvJXEnfBhU7y.pdf You can see these springs on of the Illustrated Parts List, which you can download here:
As discussed previously, your engine has governed idle, so it has two governor springs, one of which controls the engine speed when it is not idling, and one which just controls the idle speed. I'm a bit concerned that you referred to having installed a new governor spring. That will be useful to other members, and will also make it much easier for us to discuss what is wrong. I suggest that you post some pictures of the governor mechanism, showing the springs, the wire link Item 216, and their attachment points. There is a third spring (Item 629A) but it is only a speed control cable return spring, and has nothing to do with the governor: its role is to keep the Bowden cable inner wire from kinking when you reduce the speed. Note that your main governor spring is Item 209 on of the IPL, while your governed idle spring is Item 211. This is similar to the procedure for adjusting the maximum speed, with the tang at the end of the main governor spring. In case it helps, most vertical crankshaft Governed Idle engines have their idle speed adjusted by bending the stationary tang at one end of the second (idle speed) governor spring. I sometimes find the 270962 manual takes some fathoming unless you have the machine in front of you.
BRIGGS AND STRATTON GOVERNOR LINKAGE DIAGRAMS UPDATE
Most of that manual is a fairly minimal update from the 1984 classic manual, but the 1984 one did not cover Governed Idle, or emissions carburetors.
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