I need to change the HG and water pump impeller in my old Sea King 35hp. I was told it is the same parts use on that year Johnson. I think I found the right impeller, part number Sierra 18-3083, is this right? Does anybody have the part number or link to the right HG? I looked in the parts section, but there is no way to enter the year of the motor your working on. I found the HG a few months back without a problem, but now that I'm ready to purchase, there is no way to look it up.