I have bought an 1979 evinrude 25 hp model number 25904. the motor was not idling so I started to try and trouble shoot. started out with the carb did not rebuild but it looked real clean.took off the fuel pump and accidently broke off the fuel feed line.After trying to find the fuel pump online I realized the fuel pump on the motor was from a 1982 15 hp motor .My question is could this be part of my idling problem.I am new at outboards.I do not have an manual as of yet but one is on order.Any help would be helpful