I may or may not be able to help, it depends on the part numbers and what they mean. Your part number begins with 1E7 but earlier models begin with 396. The rest of the number is the same. I have a carb from a Yamaha GT80, and the plunger number is, 3671437100. So, is this the same part? Maybe someone else could help here. If it is, then I can let you have the part to see if it fixes your problem.