Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
Hello, Have you done any service on the machine? Fuel filters, oil etc? and have you tested it under a load?
I'd be curious to see if the frequency swing starts sooner and is more pronounced when under a load.
My first thought is a fuel supply issue which will probably be exaggerated if you test...