Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 269Get this manual

Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 269

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3) Attach the vacuum gauge adapters to each intake manifold plug hole and connect the vacuum gauge hoses to the adapters Connect: The No.1 vacuum gauge hose to the No.1 vacuum gauge adapterThe No.2 va