Model Number and Type Starting Serial No Model Number and Type Starting Serial No 2.5 Hp 8.0 Hp GX100 QAF GX240K1 QA GC04-3000001 to 3945545 4 Hp  GX240K1 HA (6:1 Reduc) GC04-3000001 to 3945545 GX120K1 QA2 GC01-2000001 11 Hp GX120K1 QX2 GC01-2000001 GX340K1 QA GX120K1 QXC9 GC01-2000001 GX340K1 VA2 GX120K1 QXS2 GC01-2000001 5.0 Hp (GC Series) 13 Hp GC160 QHA GX390K1 QA2 5.5 Hp GX390K1 QNE GX140 TX GX160K1 HX GC02-2000001 GX160K1 QX GC02-2000001 GX160K1 RH2 GC02-2000001 GX160K1 TX GC02-2000001 6.5 Hp GX200 QX2 GCAE-1000001