Randalla Posted November 2, 2009 Share Posted November 2, 2009 Does anyone know the trick to making this tool work. I've had two of them and have never been able to get the little float to rise no matter how it is adjusted (in our out) or what the rpm level is. I've resorted to balancing the carbs the old way (hose in the ear) but would like to know why the tool does not work. Thoughts??? Quote Link to comment Share on other sites More sharing options...
psdenno Posted November 2, 2009 Share Posted November 2, 2009 Normally, just pressing it snugly to the carb after removing all the air cleaner shrouding and then adjusting the Unisyn throat opening by screwing it in or out does the trick at idle RPM. Do you have a tight seal between Unisyn and carb throat? Dennis Quote Link to comment Share on other sites More sharing options...
Randalla Posted November 2, 2009 Author Share Posted November 2, 2009 I do. There is a rubber seal on the tool. does it make any difference, in terms of it working, if you use mate it to the air horn of the air cleaner backing plate or the carb mouth without the plate? Seriously I've tried everything. At first I thought it was the tool so I bought another one and had the same result. Quote Link to comment Share on other sites More sharing options...
psdenno Posted November 2, 2009 Share Posted November 2, 2009 I take the air cleaner backing plate off and apply the Unisyn directly to the carb. Taking the backing plate off also makes it easier to get at the idle adjust nut on the bottom of the carb. The factory manual shows the procedure being done with the air cleaner sheet metal off the carb. Dennis Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 2, 2009 Share Posted November 2, 2009 Get the SK or Weber tool, 1000% better, and cheaper than what they want for the unisyn nowadays. There was a thread on this not too long ago with some photos and JC Whitney references to the part numbers. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted November 2, 2009 Share Posted November 2, 2009 You can adjust the aperture on the Unisyn. If it's all the way open there may just not be enough vacuum to make it function. Quote Link to comment Share on other sites More sharing options...
pat1 Posted November 2, 2009 Share Posted November 2, 2009 Years ago when I got mine it would not work no matter what I did. I took mine apart and found one of the passage ways was not drilled out all the way. So I drilled it out all the way and it has worked for the last 15 years. Quote Link to comment Share on other sites More sharing options...
Randalla Posted November 2, 2009 Author Share Posted November 2, 2009 Now that sounds like the solution. I'll take a look and let you know. I even tried graphite where the float is thinking it was not free enough to move. Thanks Quote Link to comment Share on other sites More sharing options...
silverarrow27 Posted November 3, 2009 Share Posted November 3, 2009 I bought mine from Summit a few months ago and worked right out of the box. Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 3, 2009 Share Posted November 3, 2009 http://forums.hybridz.org/showthread.php?t=154641 Links to the real useful synchroniser tools in the thread above. It's like going Italian: Once you've done it that way, you will never go back to the old way! Quote Link to comment Share on other sites More sharing options...
Randalla Posted November 4, 2009 Author Share Posted November 4, 2009 I gave up on trying to make the Unisyn work after taking it apart and not seeing any obvious things wrong. Just ordered the SK from J C Whitney today. Thanks for the help. Quote Link to comment Share on other sites More sharing options...
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