heres one for ya;bought an SV-100 goes on test stand would not suck gas,went through all the normal checking of this and that looked down in the carb looked black,pulled the carb the dam gasket center hole was not punched out,what clown put this together.so after reassembly and a 6 pack the think has ran perfect for going on 6 yrs.and a merry christmas to all.Geo.