New to me engine in beautiful condition except for leaking oil. Looking at the parts diagram everything seems to be correct and in order with my motor. Problem is I can not lay it down, on its side or even carb up position without it leaking oil out of the reservoir cap. It fits on well enough but seems to me should have an o ring or something. I tried n o ring but then the cap does not seat and oil leaks , same problem. Is this a common issue with these motors .? Makes a mess anytime it is transported unless fully upright
