ys engine
 

hi,, i just purchased my first ys 120 engine, i have read how to adjust the carb,, but i can`t seem to firgure out where the low end adjustment screw is,, or i`m just confused? its a f120 ys,, the engine seems to load up at idle,, any help thanxs

RE: ys engine
 

The low speed needle is on the carb opposite side of the throttle arm

Remember that it is an Air Bleed, so open it (CCW) to lean out the low end mixture

RE: ys engine
 

thanxs mike,, now from what i can see in the figure its the small screw inside the throttle ,, opposite the throttle arm,, but not the needle screw? correct?

RE: ys engine
 

my ys f120 doesn`t have a adjustment screw there

RE: ys engine
 

Suggest that you go on to the engine manufacturer's support boards and ask the questions of Dave Shadel of YS who gives excellent advice.

RE: ys engine
 

The F 120's did not have a low speed adjustment on the carb.. Low speed adjustments are done by making slight adjustments to the pressure reg. screw on the bottom of the engine. Years ago my local YS "experts" said the screw should be almost flush with the edge of the reg. housing to give the best low end mixture. I wound up running mine turned in a bit more but I had a good idle and transition there.

Steve

RE: ys engine
 

http://www.ysperformance.com/

RE: ys engine
 

hey thanks for all the advice guys i will check it out