paulpicard Posted August 1, 2006 Share Posted August 1, 2006 Seems I mis-diagnosed my fuel problem (Bang!Dead! July 24) The carb is over-rich - not starving. Raw fuel is visible percolating out of the slow-speed air bleed jet beside the primary venturi, at anything from off-idle to secondary opening. Blubbers, stinks, and barely runs. I'm assuming this isn't normal. Car ran fine before a large backfire last week. (Carb was rebuilt by me recently with no issues since Debris from backfire? Power valve damage? Where to start? ) Quote Link to comment Share on other sites More sharing options...
desertsubaru Posted August 1, 2006 Share Posted August 1, 2006 I hit a speed bump with my hicrappy and it did the same thing. Never did figure out why just put on my holley 5200 (weber 32/36 copy) that i had ready to go. Now more power. better milage and the sound is awesome! Quote Link to comment Share on other sites More sharing options...
monstaru Posted August 1, 2006 Share Posted August 1, 2006 float setting sounds like it is to high.....just a guess.but sounds like that to me:grin: Quote Link to comment Share on other sites More sharing options...
paulpicard Posted August 2, 2006 Author Share Posted August 2, 2006 Float level right in the middle of the sight glass. Don't have a Weber hanging around. (I wish!) Anyone else?? Quote Link to comment Share on other sites More sharing options...
monstaru Posted August 2, 2006 Share Posted August 2, 2006 did you measure it?it is a pretty precise measurement.there should have been a small square in your rebuild kit.and a measurement on the back of the instructions.i've only rebuilt a few of the hitachi's,so i don't recall the measurement,however,the float is a very integral part of fuel flow .if you are getting to much,it is most likely the float. Quote Link to comment Share on other sites More sharing options...
desertsubaru Posted August 2, 2006 Share Posted August 2, 2006 Float level right in the middle of the sight glass. Don't have a Weber hanging around. (I wish!) Anyone else?? Maybe bad needle valve or seat. Seen it in lawnmowers and other carbs. Sratch in seat or needle valve. Dirt. There must be a reason that its bubbling out. Check for hole in float. Quote Link to comment Share on other sites More sharing options...
paulpicard Posted August 2, 2006 Author Share Posted August 2, 2006 OK, monstaru, yes, when I rebuilt, the float was carefully set as per the gauge in the kit, and the fuel level as seen through the sight glass is within spec. Desert, yeah that's a valid scenario. Trying for an on-car fix, of course. Does everyone agree that the fuel percolating out of the air bleed jet is not normal? I don't really know what the normal aqppearance would be, since when I rebuilt, it ran fine and I had no reason to stare into the carb and watch the show:brow: Quote Link to comment Share on other sites More sharing options...
paulpicard Posted August 26, 2006 Author Share Posted August 26, 2006 OK, monstaru, yes, when I rebuilt, the float was carefully set as per the gauge in the kit, and the fuel level as seen through the sight glass is within spec. Desert, yeah that's a valid scenario. Trying for an on-car fix, of course. Does everyone agree that the fuel percolating out of the air bleed jet is not normal? I don't really know what the normal aqppearance would be, since when I rebuilt, it ran fine and I had no reason to stare into the carb and watch the show:brow: OK, better late than never. Pulled the top off the carb and found that the power jet assy. had unscrewed itself at least 2 full turns. No idea whether a backfire could cause this, but I did notice that the Haynes manual says the power jet should be staked in place. Anyway, tightened it down, and it runs fine. Any comments on this? Quote Link to comment Share on other sites More sharing options...
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