hi there dolson894
here is web site for owners manual
http://lawnandgarden.manualsonline.com/manuals/mfg/husqvarna/yth180.html
download owners yth180 manual it has a wiring diagram in it - may help
sounds like a starter solenoid problem, check for good grounding of the negative bat cable and grounding of the solenoid to the frame , check for 12 volt at the solenoid tab ( not the heavy contacts)
this wire solenoid tab wire comes from the S marked terminal from the main switch and power from the battery is taken from the HOT post of the starter solenoid up to the B terminal of the main switch, from there when contact made between B + L + S @ SWITCH voltage sent to solenoid for start
basic connections for switch in start mode is B + L + S
run / light B + L and Makes A + Y
run B + L off G+ M +L
check seat switch and brake switch - bypass with jump wire if need
across white to wjite wires on brake switch
see what hapens , the try a jump wire across the seat switch wires green to green and retry
if stil no good - replace solenoid as you mentioned with a jump cable straight on start motor turns over good
check out website
cheers hope it helps pauly46
dont forget the thumbs rating
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