Picked up this old gal

[1946Zephyr]

Re: Picked up this old gal

I would spray som PB Blaster in the motor that's stuck and make them both run. You'll get a lot more for your money.

 

[jay_merrill]

Re: Picked up this old gal

When you size much over 600 on the longest side of the photo, it will cause the text to exceed the width of the window for most users. That means you have to keep scrolling left/right, right/left, to read the posts. It gets annoying and some people will just quit reading.

As for my setup, I'm currently set at 1920 x 1200 on my main monitor (24" Dell), plus I have two other monitors, for a total of 63" of viewable space. LOL, somehow, I don't think its my setup!


PS: This is 600 x 400, which is an ideal size, to me.

???

 

[northwoodslivin]

Re: Picked up this old gal

I would spray som PB Blaster in the motor that's stuck and make them both run. You'll get a lot more for your money.

I would do that but I dont think he has the cover for the other engine, already took some parts off of it already "which I have" We're the lower units green in 69? I am starting to think the powerhead cover on this one is off of that one, never really got a chance to ask him too many questions but he assured me it runs well.

Still would like some input on the leakage on the lower unit if possible....is that all from exhaust? which holes would be the water intake? I am taking it the exhaust exits out the big hole in the middle half way down the lower unit and also those two little ports on each side of the lower foot area where there is what appears to be exhaust leakage?

Ya.. I am kind of new, still learning here fellas

 

[1946Zephyr]

Re: Picked up this old gal

A lot of those small holes on the sides of the lower unit are for drainage in the cavities inside. You should make sure they are kept clear of debris, so water doesn't sit in them over the winter and freeze up. The older motors typically had 1/8" diameter holes but in the later motrs, some were as big as 1/4" because the smaller holes plugged up too easy.

Yes, I believe Johnson did have green lower units in 69. Some were white also. My 74 Johny is all green, except for the hood.

 

[northwoodslivin]

Re: Picked up this old gal

Ok,

So I take it that those stains are normal for that style/year of motor then?

How might I make sure that those holes are all clean? I read that you can stick a piece of small wire through the holes to make sure they are not plugged? or do I have to take the whole lower unit apart?

 

[1946Zephyr]

Re: Picked up this old gal

If you can unplug them without removing the lower unit, you're all the better off. Usually by the time we are lucky enough to get a 40+ year old motor, those holes have been long plugged and corrosion set in. When this happens, it will be necessary to remove the lower unit, to remove and scrape out the corrosion. Usually the problem child is the one that is down by the prop.

 

[jay_merrill]

Re: Picked up this old gal

'69 Johnsons were Forest Green. The paint of the 4hp in my photo, above, is it.

The water intakes on your motor are in two places - one is a stainless steel plate (may be painted) on the side of the gearcase, with some holes in it and the other is a screened slot on the front of the "horn" that sits just above the prop, on the lower, back side of the cavitation plate.



???

 

[northwoodslivin]

Re: Picked up this old gal

Thank you very much for that info.

Well I guess those holes are not plugged as they have expelled a residue as you can see on the lower foot there are two holes on each side where that residue/exhaust has run out. I guess it is to my understanding that the exhaust/water exits the large hole at the middle center of the lower unit, and once warm it then transfers the exhaust/water out of those ports by the lower foot are under the calvatation plate?

 

[northwoodslivin]

Re: Picked up this old gal

Managed to pick up the parts motor today. FD-21R I take it that this is a 1967 20HP? the lower unit looks to be in very nice shape, even better then my other motor. I am wondering, would the lower units be interchangable? They look identical accept that this one is green.

 

[northwoodslivin]

Re: Picked up this old gal

Anyone?

 

[Fisherball]

Re: Picked up this old gal

Search iboats boat motor parts link above. They have parts diagrams of each LU, if you search for each it may bring you to the exact same diagram. That's one way of knowing if they are the same. The other way would be to remove each & compare. Those stains look like exhaust/oil stains from the color but do not rely on my guess. You probably should change impellars. When doing that the LU is pretty easy to check for & repair leaks. I bought a positve/negative pressure teaster from Auto Zone used to check auto fuel lines, it had the range I needed for both.

 

[northwoodslivin]

Re: Picked up this old gal

I tried, the layout is too complicated for me. Was hoping someone that knows these motors well would happen to know. Dont want to rip off the lower end on my good motor ruining the gaskets only to find out it wont match up

 

[northwoodslivin]

Re: Picked up this old gal

Oh and thanks alot for confirming the stains for me, makes me feel a whole lot better

I know this lower unit on the other motor is in far better condition... the pin head that owned it left the plugs out of it and it siezed up pretty good "cylinder walls are pretty rusted " a shame, because I dont think this parts motor was used that much.

 

[northwoodslivin]

Re: Picked up this old gal

I guess an easier question to ask would be. Do the lower units from 65-66 on the 18hp models swap with a lower unit on a 67 20HP?

 

[1946Zephyr]

Re: Picked up this old gal

yes, they should work just fine. I had a '59 18 once that had a lower unit off of a 70's motor. The 18 -20's pretty much had the same lower unit, from 53 all the way up to 76. You'll just need to make sure your replacement parts such as seals and waterpump kits match the year of the lower unit housing, just incase they may have possibly changed seal diameters and such.

They made some minor changes in the A/V plate and the roundness of the gearcase, from what I see on the exterior. The older A/V plate was rounded and the newer ones were more rectangular with angled front and back. The older gearcases also had a small rib at the seam, whereas the newer ones were more smoothe and rounded. The 25 is also the same design too, up till 1976.

 

[northwoodslivin]

Re: Picked up this old gal

You are correct. The lower unit on the 67 does fit your description. You know your stuff!

That is wonderful news. Thanks ever so much for helping this guy out

 

[1946Zephyr]

Re: Picked up this old gal

any time. Those are great old motors. I have a 57 version of what you're working on.

 

[northwoodslivin]

Re: Picked up this old gal

thanks

Ya, they must be good if they are that old and still running huh?
Do you have any knowledge on newer Johnsons? perhaps you could go read my thread titled 1989 Johnson 20HP as I am thinking on picking this up!

Thanks again!