Engine Surging

[Tristar]

I fly an old 182 on occasion. I have no problems with it except for one question. Upon climbing through about 9,500 the engine will surge on occasion. It's not a constant thing, just every now and then. It hasn't gotten any worse and there are no others symptoms that I've noticed. I thought maybe I wasn't leaning enough but I don't think thats it. Anyone have any ideas?

 

[Henning]

What does the oil pressure needle do on these occasions? Is it a surge up or down from the governed setting?

 

[Tristar]

I haven't noticed anything.

 

[Henning]

I haven't noticed anything.

Hard to diagnose a problem with no data to reference.

 

[Tristar]

Join the crowd which is why I asked.

 

[Henning]

Is it running MoGas or 100LL? Is it one surge or a sustained series?

 

[bnt83]

Old as in carb'ed O470? Baldders? Fuel Quality? Carb Icing?

 

[DavidWhite]

Old as in carb'ed O470? Baldders? Fuel Quality? Carb Icing?

I think it's early 60s

 

[bnt83]

What power settings at the time?

 

[bnt83]

Like one mag not firing kinda surge or cylinders not firing kind?

 

[Tristar]

It sounds like I pulled power back momentarily.

 

[Henning]

When it happens again, note what the MP and oil pressure do. Why do you think your initial thought of not being lean enough is incorrect?