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Old 05-23-2017, 12:51 PM   #3
FirstOwner69
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Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,841
Re: Heat riser spring and weight

The weight pulls it open. The spring is a bi-metal spring that holds it closed until it heats up.
If yours is sticking so it doesn't open or close, you can buy a special lubricant and try that before buying a new heat riser.
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