I am new to all of this! I have a Sears 143.700012 Ser 0035E. The chart says this is a OH180. The parts lists that I have found show different numbers in front of the OH180 i.e. 180064F-OH180. Is mine a 180035E-OH180? This motor is missing some parts (air filter, gas tank, starter switch assembly) and I want to get the right stuff to make this hoss roll!