PRI stands for prime. you never want to use this position on fuel petcocks. You will notice one hose coming off each petcock going to the 1 and 3 cyls. You can remove these and put rubber vaccum caps on both ends. That way they wont work. You should only keep fuel to on position, unless you need reserve. Please see my little storie I answered.re:whats up. Earlier in the day.
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