Walbro 76- and in most instances -it works just fine
But the Walbro 201 -primes (chokes) much more quickly -why I simply have not figured out--and has the low /high spray holes located differently .
It takes a couple of mods to use -
swap vented cover with 76 cover and drill a tiny hole thru where it is marked and plugged at the engine gasket . This lets the engine pulse directly operate it.
I find it adjusts more easily -low and high speed - strts and restarts more easily.
This is really NOT necessary to swap -if your existing carb is working well - I have a 76 on my 50 and it is a one flip setup .
But a 40 I have been working with -which first had a Bing - then the 76 -was always a pain to fire up- swapping to this carb - fixed it instantly. and idle can be set lower-smoother.
The new ignition - I really don't see any difference in running them except -they do save rpm from in flight and if you spring for th new ZDZswitch and a tach (total 80 bucks) you can directly read the engine and read the saved in flight top rpm.
I have a switch now for each engine and I do any tach reading directly - which to me is a huge advantage in doing setups .
I am REALLY fussy about carbs -
Why?
every time I find any engine which is hard starting -but good running -it is always the fu--n carb.
There are a jillion permutations of each bore size and I don't know how the engine guys eventually get the right one -unless they pay thru the nose for special calibration tests.l