Topic: 1953 25 HP Johnson – Page 2 – Antique Outboard Motor Club,Inc

This topic has 17 replies, 6 voices, and was last updated 3 years, 8 months ago by trex014.

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May 25, 2021 at 10:19 am #238941
frankr
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US MEMBER PAY BY CHECK
Why would you raise the transom when all you have to do is remove the long parts? Finding a short drive shaft can’t be that hard–or is it?
May 25, 2021 at 10:39 am #238942
opposedtwin
Participant
US Member
I agree with Frank. Source the short drive shaft and shift shaft and lose the 5 inch housing extension. The parts are out there and shouldn’t be too hard to find.

Hang onto those long shaft parts or sell them on our site. Occasionally there are people here looking for them.

Scott
May 25, 2021 at 11:15 am #238949
crosbyman
Participant
Canada Member - 2 Years
Gents, I do not disagree all I am saying is that a higher transom is a consideration on a small rig (14 feet) . It gives an edge on a backwash if ever stuck having to go downwind .

I have seen guys coming in the camp with white knuckles….

Joining AOMCI has priviledges 🙂
May 25, 2021 at 12:05 pm #238962
opposedtwin
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US Member
crosbyman wrote:

Gents, I do not disagree all I am saying is that a higher transom is a consideration on a small rig (14 feet) . It gives an edge on a backwash if ever stuck having to go downwind .

I have seen guys coming in the camp with white knuckles….

Crosbyman,
I completely see your point. I have a short shaft 1957 18hp that I run on my 12 foot crestliner. The transom has a dip in it like most 50s era boats. My plate is about 3 1/2 inches below the bottom of the boat. I need to rebuild the transom to raise it permanently but have used shims to get it closer. If I added the full 3 1/2 to the transom it would give the boat a weird appearances.

And YES! I do get water over the back on occasion when I back off the throttle very quickly. Another 3 1/2 would definitely help that problem.

It’s a trade off to a degree. Aestheics vs performance, form vs function or what have you.

Scott
May 25, 2021 at 2:18 pm #238971
crosbyman
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Canada Member - 2 Years
Security first looks second 🙂

Joining AOMCI has priviledges 🙂
May 25, 2021 at 8:03 pm #238994
bwanadon
Participant
US Member
What to do, what to do. I’m right on the fence with this one.

If I make the transom taller I’ll need to braze a thin piece of aluminum onto the back and the transom caps are curved to follow the cut out in the transom. It’s not going to look right, or I could machine up a new set of transom caps at the shop…………I’m going way down the rabbit hole here. Then I’d still need a jack plate for correct height. I wouldn’t be able to run any of my small outboards if I wanted to.

If I shorten the motor, $94 on Ebay for the 2 parts I need. Then it’s done. First time I take water over the back I’ll second guess myself though. lol

I’m going to shorten her up. Looks to be easier.

Thanks everyone.
May 27, 2021 at 9:56 pm #239134
trex014
Participant
If you would like to part ways with the long shaft extension I would be interested in buying them. I have a project that could put that extension to good use.

I was keeping an eye on that motor for a while, good to see a member got it. Looks very clean.

Thanks,
Rex
May 27, 2021 at 10:08 pm #239136
trex014
Participant
Also, I’m not sure if you’ve taken that lower unit apart yet but there is likely the correct length shift rod already in that motor. I’m not sure when but OMC switched over to a 5 inch shift rod connector for the long shaft motors instead of two different shift shafts, which could mean all you need is the short shift rod connector which is a very easy part to find.. many motors made by OMC from the mid 50’s into early 70’s used that part.

A word of advice is to have patience when taking this lower unit apart, there is VERY little clearance to fit a screwdriver or socket onto the shift rod bolt when trying to drop the lower unit… I think I invented some new words the first time I took one apart.

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bwanadon
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