I bought a used generator from a RV dealer. No warrenty..Now after just 1 week and maybe 10 hrs of running it is leaking oil underneath or I am pretty sure on side of motor up near the valve cover where it says OHC on cover just below it it. The oil seems fresh not old oil..But the oil in motor is new anyway..The is a EF3000iSE Yamaha generator......DSoes anyone who know about them Tell me What I should check? or maybe try tighten like bolts etc...I have all the outside covers off it now. It is only maybe 1 1/2 old..Thanks