C-85 hesitation

After much delay, hangar remodel got in the way, the issue is resolved. There indeed was a carburetor issue, the carburetor on the C-85 was actually one that was intended for use on a C-90. Sending out the carburetor for proper jetting and yes indeed some cleaning resolved the hesitation issue. The carburetor was just installed this weekend and taxi testing proved it runs much smoother in transition from idle to full power. D&G Supply in Niles Michigan did the work on the carburetor and from what I can tell so far it is money well spent.

No one could have said it better.

My C-85 hesitates a little when I apply full throttle. I just Slide it forward smoothly and it responds acceptably. Spark plugs were cleaned at the annual inspection and don’t appear to be an issue. I suspect the accelerator pump on the Stromberg.

Keith, what did you find on your Ercoupe?

Steve

Find out if he changed or cleaned and gaped the sparkplugs. I know on my last annual 3 or my plugs were marginal at best on the test bench, so I bought all new plugs. My C-85 runs better now than ever and it always (since I bought it) has had a slight vibration at cruise which is now gone.

Hello , I have a C-85 with Stomberg carb and am experiencing significant hesitation when transitioning from idle to full throttle. Regardless of the speed that the throttle is pushed forward, the engine will hesitate and nearly cut completely out at times. Once full throttle it seems to run fine but a sudden need for a go around could possibly pose a problem.

Prior to recent annual it did run fine, but I am new owner and do not have much experience with the plane yet. I feel as if it is something minor, the plane has been well taken care of, but none the less something that I need to get resolved before continuing my flight training in it.

Tomorrow I will be calling the mechanic that did the annual on it and see if he has any ideas but I thought I would throw this out on here to see if anyone had input.
thanks , Keith