Hello - just joined so hope can get some help. don't know year of my snowblower (son gave it to me in summer, but just now working on it). m/n 38050 s/n 8006021 with tec eng m/n h70-130176d s/n 72790. decals are most missing so control handles are a guessing game. trying to find out info on starting procedure (control positions) so can see if engine will fire (son not around to ask how it ran two years ago). put fresh gas in empty tank, put on new gas shutoff valve, cleaned sparkplug. thanks for any help.