I’ve been having issues tweaking the tune on my carb. It seemed to be gas level dependent which sounds crazy. Last night though I noticed that the fuel line has a little weep around where it connects to the carb. I disconnected it to investigate and found that fuel is constantly siphoning from the tank to the carb when the tank is more than 1/2 full.
How do you normally fix this? I guess I can’t do anything about the siphoning affect but does that do anything to the tune? I figure I could put a fuel tap inline but am curious about the effect when it is running (richer when the tank is full and leaner when low)?
The engine is a ROK TT and the Carb is a Tilliotson HL360 as far as I can tell. It has an integrated fuel pump in the carb if I remember correctly. Will this positive pressure on the fuel line change the metering?