Topic: 1955 Johnson RDE-17 – Antique Outboard Motor Club,Inc

This topic has 12 replies, 8 voices, and was last updated 4 years, 5 months ago by outboardnut.

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January 26, 2021 at 4:04 pm #228818
woodpecker
Participant
I have a 25hp Johnson that is on a wooden boat I just restored and when I was cleaning it up to restore I noticed a discolored section on both sides of the motor below the power head. It’s located around the exhaust port. While looking at it I noticed cracks on both sides. Is this motor any good? I’ve attached photos of both sides.
January 26, 2021 at 5:20 pm #228823
crosbyman
Participant
Canada Member
not good… try a welding shop to do some spot welding if at all possible.

Joining AOMCI has priviledges 🙂
January 26, 2021 at 5:32 pm #228824
bob-d
Participant
US Member
Woodpecker, take a look at this on EBay
Alternative if you don’t have a good welder nearby.
Bob D

https://www.ebay.com/itm/1955-Johnson-Evinrude-outboard-Midsection-Exhaust-Housing-Swivel-20-25-28-30hp/183796321477?hash=item2acb1d4cc5:g:Me4AAOSwNXpcyy~y
January 26, 2021 at 6:00 pm #228826
outboardnut
Participant
US Member
Woodpecker
where do you live?
January 26, 2021 at 7:03 pm #228832
outbdnut2
Participant
US Member
That’s only going to get worse. I’d look for a parts motor.
Dave
January 26, 2021 at 7:50 pm #228833
woodpecker
Participant
I live in South Carolina. Thanks for your replies.
January 26, 2021 at 7:58 pm #228834
wedgie
Participant
outbdnut2 wrote:

That’s only going to get worse. I’d look for a parts motor.
Dave

What Dave said.
January 27, 2021 at 10:33 am #228884
olcah
Participant
US Member
discussion on similar cracks: https://www.aomci.org/forums/topic/rd-17-and-rd-18-exhaust-leg-cracks/

I think I would just run the motor and check the crack from time to time.
January 27, 2021 at 11:18 am #228886
fleetwin
Participant
US Member
Yes, this syndrome has been discussed before…I’m assuming the powerhead is the normal color and has not been overheated…. I’m pretty sure there are some modifications that should be made to the powerhead so more cooling water sprays in that area…
January 27, 2021 at 2:57 pm #228896
woodpecker
Participant
Power head looks fine. Took inspection plates off cylinders and all looks really good. Thanks
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