1977 175 hp johnson carb question

[clayvogt]

hello i have a V-6 1977 175 hp

hello i have a V-6 1977 175 hp johnson with three carbs that i bought cheap the top carb does not have a choke butterfly only the middle and bottom carb have butterflies is this correct or did the prior owner mess with this thank you clay

 

[jwbmarine]

"nope,thats correct--that was

"nope,thats correct--that was a service bulletin,modification."