Wow,this sticky is all but dead.
I need some help with my SP125.I put the U-nut on the recoiol that was missing & trierd to start the saw.I don't know what happened,but when it did start it wouldn't throttle up at all.I started pulling the carb & saw there were NO needles in the carb,it has a Tilly HS124A.I know this carb has a fixed hi jet,but I'd at least expect to see a needle for the lo.After getting the carb off almost entirely,I found a small screw towards the back of the saw diagonally inserted into the carb on the bottom.I figured this must be the lo because there was an idle adjustment screw at the top.I pulled the covers off the carb & found the diaphragms to be a bit stiff,so I proceded with a rebuild.I couldn't get the carb to hold pressure unless I put both pump diaphragms in.I put the carb back on the saw & all I get is a pop with choke on,push choke off & another pop & then nothing.I'd like to get rid of the fixed jet carb if I can as I consider them to be garbage.