Why does the mower have to be full throttle to start it, to make it move at all, and to stay running at all?
The mower sounds like it is running way to hard. Yet it won't stay running if I try to lower the throttle to a normal mowing throttle. It also took about 5 tries to start it up. It just won't run smooth at a normal throttle setting, and it will shut off as well if I try to move the throttle..thanks
Garden - John Deere - Gx75 Rx75 Srx75 Sx75 130 9hp Starter
Answers & Comments
This could be a few things as to cause :
1- throttle cables stretch as they get older , if marking on throttle says "run" it might really be choke on carb - looking down carb body(air clean off) with engine off move throttle to choke the choke butterfly should shut off (choke does have small hole in it) the butterfly should not be just barely moving or half way it needs to be closed all the way
2- modern fuels leave deposits inside of carbs if machine is left to set for long times (weeks) these deposits don't just get washed away when the engine is started again either , they must be chemically or mechanically flushed away by either a carb cleaner (chemical) or taking carb apart and cleaning it totally out (inside and out) -these deposits cause poor carb performance and even non working engines
a method to keep from having to do this often , is to install a fuel shut off valve in the fuel tank ( might already have one there you just gotta look for it) and when your done with machine shut off the gas valve and allow it to run out of gas dry !