75guy Posted April 29, 2008 Report Share Posted April 29, 2008 Trying to rebuild a DCH 340 carb, and so far, so good. BUT - I need to know what the trick is to replace the O-rings on the auxiliary venturis! I can't seem to get them to stay put when sliding the venturi in. OR they go in, but then bulge out into the hole in the carb. What the way to do this? A MILLION thanks for any hep! Quote Link to comment
Phlebmaster Posted April 29, 2008 Report Share Posted April 29, 2008 Try looking into this: http://www.the620.com/data/Hitachi_Carb_DCH_DCP_DRJ340.pdf I have never replaced my venturi o rings. Not sure how you would get them in without trouble. But...did you accidentally soak them in anything? Are they the right sizes? Where did you get them? I have rebuilt several Hitachi DCH-340s and never remember seeing those o rings. :D Quote Link to comment
datzenmike Posted April 29, 2008 Report Share Posted April 29, 2008 Both primary and secondary venturis have a paper gasket, kind of oval shape with three holes in it. The middle is for the main air bleed and the outer two are for the mounting screws. Quote Link to comment
75guy Posted April 30, 2008 Author Report Share Posted April 30, 2008 Mine just has one hole for each auxiliary venturi, not three holes per. I can tell this has been rebuilt before by some of the skinned screws, although not badly damaged. I THOUGHT I remembered seeing some sort of gasket used in there in the past, on other's carbs! When I took it apart, though, it had tiny rubber O-rings in there, or the shredded remains of them, anyhow. So, what sort of gasket is original, and how thick? Rubber, paper, cork? Thanks very much, the THICKNESS is highly important! Quote Link to comment
datzenmike Posted April 30, 2008 Report Share Posted April 30, 2008 A question... the venturis, are they held in by a horizontal screw from the back of the carb? Quote Link to comment
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