OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Briggs & Stratton Engines What spring is this?

I have a 3.5 B&S motor with pulsa jet carby in a Rover 45 mower which appears to be missing a spring. I found a picture of the same setup as mine elsewhere in these forums and have captured a section of it to show the one I mean. My engine runs but not quite as sweetly as I think it should; could this spring be the culprit? numbers for my engine are 91202 0123 01 930920
Can someone help with a part number and source for this spring please?

The one in the picture is the governed idle speed spring and the one just out of the picture is the governor spring. Now the governor spring itself comes in two different spring rates. But if you only needing the governed idle spring it is PN 691289. Now governor came in a Stone Blue and in no color so you might need to order both if it is missing completely.

Thanks for that advice AVB. Much appreciated.