Re: Anybody test a vacuum cut-out? ’57 Lark

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January 6, 2017 at 4:13 am #50417
William Jatzek
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    I have taken them apart and changed the diaphragm and cleaned the contacts.You can just put on a piece of vacuum hose and suck on it and check it with a ohm meter for operation. One other pointer they are specific to the motor year so before you mix and match do your homework. The spring inside of them is matched for the specific motor and sometimes varies from year to year so check the springs part number. The part number for the complete cutout should be stamped on the aluminum housing and from this you can check if it has the correct spring you need.