I have a 1985 Evinrude 115 that the Regulator is fried. There is actually a hole in the unit. Any way I have a 1971 50 HP Johnson parts motor. Is there any way to make the Regulator off the 50 work on the 115 so I'll be able to charge the batteries. Are there any other lower cost ways of fixing this with out haing to buy the 250-300 dollar part.