what is this hole for? (upper gear case)

[olcah]

I use a long 1/8″ drill to clean these out. However the danger is that you can easily drill past the opening and into the gearcase.

[outboardnut]

Is the the triangler hole where I should be digging?

[outboardnut]

How long is your 1/8 drill bit?

[Bob Wight]

Yes that’s the cavity drain hole. I’d poke around with a stiff wire or small rod before trying a drill.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

[outboardnut]

I have been poking . I think it is cement
The drill bit would have to be a foot long.

• This reply was modified 5 years, 8 months ago by outboardnut.

[Bob Wight]

My ‘56 Johnson was stopped up solid with hard packed sand that seemed like cement. I did what Buc suggested above then finished up by cleaning the cavity out with a jet nozzle on my pressure washer.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

[olcah]

My 1/8 drill was 12″ long. It cost about $7.00 on Ebay two years ago. I broke about an inch off the end clearing out one of these drain holes. (Shorter drill still works.) The problem is that you may not be able to see the end of the drill going past the exterior drain hole. Vertical and horizontal holes may not line up exactly. If you do drill thru into the gearbox an epoxy repair can be done. Best to proceed very cautiously and not use a power drill. I like a separate loose chuck to get a grip, pull the drill out often and clean the flutes as you go.

• This reply was modified 5 years, 8 months ago by olcah.
• This reply was modified 5 years, 8 months ago by olcah.

[outboardnut]

got it used a dremmel tool with extension .1/8 6 inch bit

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