i have a mercury 20hp serial number 2034553 need to buy a good manual for it. also the motor was overhauled before father in law died ran great last year but now it won't stay idle seems like its getting plenty of gas it starts at first then runs at low idle if you try to throttle it up it shuts off also after the first start it wont start after that seems like it wasnt to but wont. any help would be great.
