Home › Forum › Ask A Member › Help Please on Lightwin Carb issue? › Re: Help Please on Lightwin Carb issue?
OK, well I don’t want you to mess with that exhaust cover needlessly, especially if no water showed up on the plugs. I surely don’t want you to try to drill out that tiny little screw and get in a real mess if the cover is not leaking the way it is. Yeah, sometimes the exhaust pressure is greater than the water pressure and the opposite can be true as well.
I understand that you cleaned the filter, and thanks for the simple green tip, but how can you be sure that fuel flow to the carb is not the issue. My "pretty" 58 Lightwin was pretty for a reason, I’m guessing no one could get it to run right. I replaced the filter and thought I had it licked, still stumbled and stalled. Then, I found the vent in the fuel cap was plugged, "got it now" I proclaimed. Ran a little better but still stumbled and stalled after running a little while. Finally, I watched the fuel flow out of the copper fuel tube while disconnected from the carb, it was kinda weak. I then poked a metal wire through the brass fuel line, and out popped what looked like a blob of silicone or something rubbery like that.
PS- will reread all your posts, perhaps I have overlooked some of the info you posted.
Any way you could post of video of the engine misbehaving?
OK, just reread all your postings in this thread, didn’t see anything about confirming good fuel flow. In your first post you say the engine doesn’t idle down the way it should. But, in one of your later posts, I think you mention that dead idle performance is good. Maybe you mean that the engine wouldn’t idle properly with the original carb, but idles well with the replacement carb.
My only other concern is a basic one, but I don’t want to overlook it. You are running the engine in a barrel/tank, correct? It is not uncommon for RPM to vary at mid/high throttle settings due to the water/air sloshing around in the tank causing ventilation and RPM fluctuation. Again, try to post a video of the engine misbehaving, maybe that will help us understand what you are describing.