Mercury Force 120HP Stator Identification Help!!

[kyle01041981]

I have what I believe to be a 1991 Mercury Force 120 (at least thats what I was told, I cannot find a serial number). Well, The stator has gone bad...and there are a couple different ones for this year model. I have removed the stator and it has a part number (Part # 398-9710A33 and it has 1535 engraved on it). Is this enough information to identify which stator I need? Can anyone tell me what and where to get it?

Thanks!