ORIGINAL: brianengy
Ok, I bought the Top Flite Power Point Balancer last night at the LHS and three props. All the props were Master airscrew brand G/F Series. One was a 10x6, 10x7 and I had one that wouldn't balance, it was the 11x6 prop.
This is what it was doing. This is from the manual.
If the prop comes to rest in a
level position, but is still obviously out of
balance (hole slightly off-center), you
may need to add weight to the lighter
side of the hub (see method 2).
I had a glob of ca glue on the light side but it would not balance out. Did I just get one lemon of a prop? The other ones balanced perfectly.
CA glue is very very light stuff.
If the prop has an off-center hole and it's an MA prop with cavities in the hub (they're visible from the back, not the front) then place a weight into one of those cavities and check the balance. Epoxy the weight into the cavity. The cavity will be sealed when the prop is on the engine, but you don't want to lose the weight later.
It's always worthwhile to check the balance. But you really don't have to get the balance dead perfect. It's nice if you do, but really not a biggie. The real value of balancing is to cull out badly balanced ones. They happen less and less often nowadays, but still do. And seems the ones you do find would be killers.