Hi I bought a 5hp eska 2 sroke.motor for my canoe I'm the ponds. Anyone know how to get the chole nob off I need it of to access carb it has a silver ring on it on the end. Here is a photo along with my serial number for reference . Don't want to damage and need in there. Thank you also any direction on what to do to an engine that apparently ran good 2 years ago when last used. I've pulled ut over alot. but haven't got access yet to do anything else really. Doesn't sound like units even trying but compression seems good