美国采购需求：小型挖掘机、小型挖掘机及附件

I'm reaching out because I own an excavator but unfortunately, I didn't receive any manuals or documentation when I purchased it. This has made it quite challenging for me to understand its operation and maintenance requirements fully. I'd appreciate it if you could send me an electronic copy of the manual along with any other relevant paperwork that originally came with the equipment. Additionally, I noticed that my excavator is gas powered, and there's no B&G tag on the engine, leading me to believe it may be from a different brand. I would be grateful for any information you can provide regarding the engine's brand or any additional resources that could help me figure this out. Thank you for your assistance!