Coil problem. Interchangeble?

[ajrd01]

I have a 50 hp Force I'm resurrecting and am hung up on the coils. Proper coils are 250 new and used ones are like hens teeth. But.... Same HP different coil? Much much cheaper (dont know why) and sounds good to me but i dont want to fry anything....

 

[Jiggz]

What year is your 50HP? What year and hp is the different coil? Cannot make a comparison with only one data out of four is available.