Specifically a '75 110 engine but should apply for any D-Jet. The auxillary air valve. I have multiple sources of info but none specifically state if the valve completely closes when the engine warms up. I know it is completely open when cold but it is still drawing a slight vacuum at the air intake when the engine warms up. Am having a problem with low manifold vacuum. Any info appreciated.

any aux air valve, whether kjet or djet, should close completely when warm. very common for them to stick BEFORE closing. good luck, chuck.

Thanks.