ditch witch sk350

I've been wanting an engine manual/parts manual for this ever since I bought it. The operators manual is of course easy to find....





Current problem is that it has no power. Idles fine, but bogs down when it's moving or asked to lift or do anything. So I'm wanting info about the fuel line, carb....ect. Just how to find and identify basic parts.





Anyone have any decent literature on this machine?



Thanks