I have a 1972 Evinrude model 50272c that needs a starter motor. the research I have done , says that two different starters were produced . the first was a Prestolite starter that had two brushes in it . the second was a Bosch that had 4 brushes. I would like to get my hands on the 4 brush model, but I can not seem to find the part numbers for it . does anyone have the correct part numbers for the 4 brush starter? That I may be able to search one out . thanks