Re: Johnson 115 HP Carburetor
I'd be surprised if you could find new carbs for a '75 115.
Carb kits will run you between $20 and $30 per carb depending on what and where you get it.
I'd imagine new carbs would run you something like $250 each if you could even find them.
Let me hasten to say, unless your old carbs are damaged in some way just rebuild them with new kits.