For the BF2:

http://marine.honda.com/pdf/manuals/31ZV0610.pdf

(No Mention of Impeller R+R procedure,Though)

WHOA! This review claims the 2HP 4 stroke Honda doesn't have a Water Pump:

http://www.tackletour.com/reviewhondabf2d.html

AND yet another review that says No Water Pump:

http://www.outboard-engine.com/enginespecs.php?recordID=87

Dealer running it DRY on Roller Stand:

http://www.youtube.com/watch?v=XIMOANMgG-4

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'84 300SD sold
124.128