Honda BF35A-BF45A Outboard Motors Shop Manual., Page 338Get this manual
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TUBES 1) Install the following:
[19] TUBE CLAMP
[I AIR VENT TUBE 81
[ 11 3-WAY JOINT PIPE [17] AIR VENT TUBETUBE CLIP B10 (5)
[16] AIR VENT TUBE (4.