Hi, two blowers in question here. A 2006 echo at my home and a mid-1990s craftsman at our mountain home. The echo starts first pull, runs well, is very efficient, etc. But it's as oily as can be. I run Mobil1 2T oil at the correct ratio, same as in my husqvarna trimmer of the same age (which did have a fuel line go bad, but that one dripped fuel, which the echo doesn't do), and the echo is oily while the trimmer is not. Neither smoke or operate in any odd way. It seems to be worst at the carb gasket and primer bulb. It seems to lose fuel from the tank quickly too. But the fuel lines all look perfect, and this seems to be originating from the carb area. How should I best diagnose? The second is a craftsman. We bought it new in the mid 90s, but we bought it at sea level and have it in the mountains, fwiw. Of course mountains by east coast standards are like 1000ft or so. It has never run right, even after taking it for warranty repair, probably back in around 1995. It has no primer, but it starts well, but it needs to be choked to operate. As a result, when running, it's pretty smoky. It will run all day at about 1/3 choke, but if like to fix it. It is a carb setting, but in not entirely sure what to go after. Recommendations? Thanks!