Hi I have a '85 evinrude 175 V6 dont have the numbers with me. I need to use to batteries to start it. The batteries are new and test good with a draw. The cables to the motor from batts are as short as can be. If will start fine on 2 but with just one batt.The sprocket just engages then disenages. SDhould I rebuild starter or replace and can the avergae person do this??? Thanks guys this site has helped alot Stas