Originally Posted by aaronwhitt82
I have a 99 Moomba Outback with the Holley carb....
The Holley PN for it should be 75021, 75021-1 or 80408.
Also the carb is 600CFM with a 2.5 power valve
Here is the link to SkiDim for the rebuild kit you need
That is weird that skidim has the same renew kit for the 80408 and the 75021. The 80408 is a 715cfm carb and the 75021 is a 600 cfm. My guess is you have the 600cfm carb. Holley does not list a renew kit for the the 600 cfm 75021 but does for the 715 cfm 80408. The renew kit for the 80408 is a a 703-45. My guess is skidim is selling that kit for both carbs but Holley's literature doesn't really support this. I don't know enough about carbs but maybe since both carbs are 4150's the renew kit will work but it will bump the 75021 carb from 600 cfm to 715 cfm?
My dad is pretty knowledgeable on carbs. When he gets back from lunch I will ask him what he thinks.
By the way the price on that kit at skidim(assuming it is a Holley 703-45) is an ok price. I bet it could be had somewhere cheaper though.
Now if your carb is a model 4160 you can forget all those other numbers.
pull the flame arrester off and find the list number that is stamped into the horn like someone already suggested.