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I understand when I loosen this bolt (see picture below) the warm oil will drain out the pipe to the left. The only problem is none of my wrenches fit? Is there a special tool needed? I did notice the bolt head has a slot in it. What am I missing?

Nothing special about it other it is a 10 mm on that 49116-0714 oil drain. BTW it is $6.60 to replace it here plus labor and a 16mm o-ring. Everything except the mounting bolts are usually metric on the Kawasaki engines.

What @StarTech said.The “slot” is squared, try the business end of a 1/4” ratchet and extension.

MParr said:

What @StarTech said.The “slot” is squared, try the business end of a 1/4” ratchet and extension.

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The 49116-0714 [in hand] is not squared. It is 10 mm externally [socket or wrench], internal hole is a 6mm hex [6 mm metric hex key], and the slot is across the 10mm so you would need a flat blade screwdriver at least 12 mm wide.

Hex = 6 sides not 4 sides [square].

Most of these oil drains I replace are due to the use of the wrong tools. It is best to use a socket as usually you can use an extension and ratchet or ratchet wrench. I have yet to so square drive on any of them.

6mm hex? Couldn’t tell because of the mud dauber nest.

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