Topic: Bent piece inside 57 Johnson Lower-please see pics

This topic has 11 replies, 7 voices, and was last updated 9 years, 7 months ago by wiscoboater.

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April 2, 2015 at 3:20 pm #1092
danblue
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Hello Everyone,

Well, I am about to start prepping my newly acquired 1957 35hp Jognson lower housing for paint, and I noticed there is a bent rim piece. I lifted that flat metal plate off and noticed this bent part. See pictures attached.

Will this bend in the metal cause any issues? I’m about to cover this cavity with paper and tape it off for painting, then I’m having my outboard mechanics essentially rebuild the lower for me. I just want to make sure this bent area won’t cause any mechanical issues, or water/oil leaking issues.

Thanks!

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April 2, 2015 at 3:21 pm #13214
danblue
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April 2, 2015 at 3:22 pm #13216
danblue
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April 2, 2015 at 4:33 pm #13220
al-lockhart
Participant
Canada Member - 2 Years
Looks perfectly normal to me, just the way the casting is made.
April 2, 2015 at 4:45 pm #13221
danblue
Participant
If you look at the first picture and notice that slight discoloration in the middle of the bend, then look at where my pencil is pointing in the remaining two pictures, there is a slight crack there, and you can see daylight through it.

I just want to make sure this doesn’t create an area where water will get in, etc. Is this a concern at all?

Thanks!
April 2, 2015 at 4:53 pm #13222
chinewalker
Participant
US Member
That’s a common issue. What happens is water gets trapped in those cavities, then freezes, popping the lip over. Really doesn’t make a huge issue, as the entire area is sealed under the water pump plate so that water can be drawn up from below. That is, as long as the base plate is supported enough elsewhere that it can’t bow or warp.
April 2, 2015 at 6:10 pm #13224
danblue
Participant
Thank you Chinewalker. Well, the base plate fits perfectly snug there, and there’s nothing that looks like it would cause any issues…The fit is perfect….I just didn’t know if that slight hole where this metal is bent would be cause for water to enter any part of the unit to cause problems, etc…Seems to me this is not a problem.
Any other input is much appreciated.

Thanks!
April 2, 2015 at 6:40 pm #13227
mr-asa
Participant
The seal is in that brass part the driveshaft goes through. There’s no other seal in that area. Shouldn’t be an issue.
April 2, 2015 at 6:49 pm #13228
frankr
Participant
US Member
quote danblue:

Thank you Chinewalker. Well, the base plate fits perfectly snug there, and there’s nothing that looks like it would cause any issues…The fit is perfect….I just didn’t know if that slight hole where this metal is bent would be cause for water to enter any part of the unit to cause problems, etc…Seems to me this is not a problem.
Any other input is much appreciated.

Thanks!

As long as the hole doesn’t go through to the outside of the case (below the cavity under question), it shouldn’t be a problem. I agree with the freezing theory. I’d use it without fear. Be sure to clean it up where the plate sits, and use some sealer.
April 2, 2015 at 7:35 pm #13230
danblue
Participant
I understand. So any "sealing" is achieved down in the hole where that brass ring is with a seal seated underneath the brass…. I watched a guy on YouTube removing this brass ring recently to replace the seal.

So we can define this cavity area where this bend is as a "non-critical" area as far as water/oil moving into and out of where leaking could occur.

Thanks a million!
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