hi i have a victa razor lawn mower with a vsx 160 two stroke engine,2005 model.it has never throttled properly in my opinion since i have had it,reved too slow for cutting,idled too fast when you wanted to empty the catcher.upon searching the forums and information made avalable by bruce, i changed the diaphragm spring in the carby and removed the red diaphragm spring and changed it for the yellow spring part no cro3643a. this change will increase rpm and make the idle a little slower. i did try a green spring but it reved too fast, it is very easy to change over springs. parts are available from your victa dealer rgs graham
