WUR: Difference between 77 and 78

[Jbabic]

Two Questions:

1. what are the differences between the two, can they be swapped for each other.

2. when making them adjustable, does it matter which one you use.

I have both, I want to swap the 78 for my 77, I noticed the 77's vacuum works, while the 78 is stuck hard. The 78 works, idles high, then backs down, but I don't know what the vacuum is for, but when I take it apart, I know that is vacumm on teh 78 doesn't work. Therefore, I was going to use the 77 version, to see if it made a difference it cold driving sputtering.

thanks!! and HO HO HO

[dean]

One thing you could do is look up the specs and compare them. The other thing you could do is to install it and then see if it runs better.