Topic: 1955 Evinrude 25 hp – Antique Outboard Motor Club,Inc

This topic has 7 replies, 3 voices, and was last updated 3 years, 9 months ago by Mumbles.

Viewing 8 posts - 1 through 8 (of 8 total)

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February 12, 2021 at 2:39 pm #230306
schneikies
Participant
Hi, Recently acquired the motor in topic title. Model 25920. I need to go through it and replace some components, does anyone have a line on a parts/assembly manual that they would be willing to share?

Thanks,
Aaron
February 12, 2021 at 3:15 pm #230307
frankr
Participant
US Member
Here ya go….
February 12, 2021 at 3:17 pm #230313
frankr
Participant
US Member
More…
February 12, 2021 at 3:43 pm #230320
schneikies
Participant
Thanks, this will be very helpful. Do you have one of these? Any pointers or things to look out for? Good source for parts?

Thanks,
Aaron
February 12, 2021 at 4:17 pm #230328
frankr
Participant
US Member
Do I have one? No. Do I have experience on them? Yes, much experience. Things to look out for? Check your serial number. If greater than 17000, beware. OMC made a major screw-up in the lower crankshaft seal, costing them major $$ in warranty costs. See powerhead pages.
February 12, 2021 at 7:26 pm #230355
Mumbles
Participant
If your motor has a lip seal instead of a carbon seal on top of the crank, they tend to leak after a few years. Not so much with the carbon seals but they have an O ring inside them which can deteriorate over time to.

https://youtu.be/cXt6fV6Z5rc
February 12, 2021 at 8:33 pm #230360
frankr
Participant
US Member
R.E. mumbles” video: The problem that I mentioned was the motors that had that same seal at the bottom end of the crank. But down there it leaks water into the crankcase, destroying all the bearings.
February 12, 2021 at 9:09 pm #230364
Mumbles
Participant
Here’s some of those troublesome lip seals as found when these powerheads were removed. It’s a good idea to remove any powerhead with these type of seals to have a look and replace if necessary.
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