Propeller Position Hummel 45

[Mrbill]

On the Hummel 45 what should the propeller position be in relation to top dead center?  I have replaced my prop with a GSC 58x22 and I'm getting pretty good shaking.  Right now I have it at the 10:00 - 4:00.  I've seen posts on other sites which were probably for a 4-cylinder (counter clockwise rotation I assume) and they recommend the 2:00 - 8:00 position for hand propping.  Any help would be appreciated. 
Thanks,

[CHARLES DEBOER]

The prop is at 10 and 4 at the start of the compression stroke.  Top dead center is a mark on the prop hub when aligned with the seam of the split case.

[Mrbill]

Thanks Charles.  I've reset my prop, but I'm still getting some shaking.  I have the wings off right now and was just wondering if I have them on do you think it will dampen the shaking?  I do have front starter on it as well.

[CHARLES DEBOER]

No, the wings won't change the engine vibration.  Check the carburator slides to make sure they are synchronized, (open and closed the same amount) then adjust idle screws.  I am assuming your Hummel 45 came with duel Mikuni carbs.