Author Topic: Propeller Position Hummel 45 (Read 1145 times)

Mrbill · « **on:** September 10, 2022, 04:43:46 PM »

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 · « **Reply #1 on:** September 10, 2022, 10:15:39 PM »

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 · « **Reply #2 on:** September 11, 2022, 05:43:32 PM »

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 · « **Reply #3 on:** September 11, 2022, 09:45:10 PM »

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.

Author Topic: Propeller Position Hummel 45 (Read 1145 times)

Mrbill

Propeller Position Hummel 45

CHARLES DEBOER

Re: Propeller Position Hummel 45

Mrbill

Re: Propeller Position Hummel 45

CHARLES DEBOER

Re: Propeller Position Hummel 45