Manifold lines - question
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Manifold lines - question
Will someone confirm where I should connect the two steel manifold lines that control the choke on my 2150 carb. I know for certain that the line with a swivel nut on it connects to the choke itself. What about the other? I thought I remembered it connecting to the port on the bottom of the airhorn in the back. Before I rebuilt my carb this weekend, I remember there being a lot of vacuum on this port. When I had the air filter removed, you could hear it as well as feel it pulling a vacuum at idle. Now that I've reconnected it, I have little or no vacuum at all. I'm wandering if I have a plug in the line now. Please help with this seemingly simple question.
Thanks, as always.
Thanks, as always.
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The inside of the choke housing has a controlled vacuum source from inside the carb. So you should feel vacuum at the port on the choke housing.
Usually the line that hooks to the choke housing runs to a heat source either on the exhaust manifold or the exhaust passage inside the intake manifold.
After that it hooks to the bottom of the airhorn as you described. There is no vacuum here. It's just a source of clean filtered air.
So the filtered air is drawn from the carb airhorn, down through the heat source where it's heated, and then into the choke housing where it warms the spring in the housing, and makes the choke open.
Usually the line that hooks to the choke housing runs to a heat source either on the exhaust manifold or the exhaust passage inside the intake manifold.
After that it hooks to the bottom of the airhorn as you described. There is no vacuum here. It's just a source of clean filtered air.
So the filtered air is drawn from the carb airhorn, down through the heat source where it's heated, and then into the choke housing where it warms the spring in the housing, and makes the choke open.
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Originally Posted by Franklin2
So the filtered air is drawn from the carb airhorn, down through the heat source where it's heated, and then into the choke housing where it warms the spring in the housing, and makes the choke open.
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The inside of the choke housing has a controlled vacuum source from inside the carb.
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