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idle circuit to primary
Posted 29 July 2008 - 09:46 PM
If I back off and let it run off the idle circuit, its great. Again, into the primary it hardly will run. Stutters and stammers.
While spraying out the carb could I have dislodged something and now have a blockage? I cant think of anything else it might be. No vacuum leaks. I have the advance going directly into manifold vacuum, fwiw.
What am I missing?
Posted 29 July 2008 - 10:25 PM
Emissions systems account for only a small percentage of all that stuff.
You really need to understand the operation of the Hitachi before you start removing stuff.
Posted 30 July 2008 - 12:00 AM
Actually, in the meanwhile I found a pictorial that you [GD] did regarding doing the same. Thats all that I took out. Either way, it left me with a box full of parts and vacuum hose.
Posted 30 July 2008 - 12:27 AM
You very well may need to replace the top cover gasket and you may as well rebuild the carb in the process as I haven't found a source for the gasket outside of an entire kit.
Posted 30 July 2008 - 10:00 AM
I'll get a carb number and order a kit at least.
Posted 30 July 2008 - 05:46 PM
Posted 30 July 2008 - 08:37 PM
Found the culprit. One of the ported fittings above the incoming fuel line was leaking vacuum.
Yeah - the metering ports make things REALLY weird when there's leaks there. You can cap them off if you like - they don't do much.
Posted 30 July 2008 - 08:41 PM
Posted 30 July 2008 - 09:00 PM
I actually had a hose going from it to the one in front of it...thinking it would act as a plug. Seems the other must be a vent or something.
Both are metering ports for different puposes, but yeah - you can't T them together or connect them to each other. They will cause all sorts of weird (undriveable) behavior.
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