Author Topic: 371 issues.  (Read 1758 times)

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Offline 660magnum

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Re: 371 issues.
« Reply #20 on: July 24, 2013, 02:59:25 am »
The Walbro HD-12B is made the same way in the idle circuit. Those extra holes are metered by the idle circuit needle valve. Also they are uncovered by the throttle butterfly as the throttle is opened. At lowest idle, they do not work.
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