I had a set of wh-11's on ebay off a 1979 v200. The wh-15's and wh-20's came with the 2.4L v225. I'm running a molested 1981 2.4L v225 with wh-22's.
I still have that set of wh-11's and a second set of wh-22's for my other motor
T-Rex (spidey's cousin on screamandfly.com) jabbers on about the different carbs . . . I'm just learning this stuff myself from everyone else. The blackmax's are nice to work on and I've gotten lucky a few times getting parts for cheap. I'd love to have a new Suzuki 175, but I can't justify the expense with good running motor and the ammount I use my boat.