18hp Johnson project

tomhath

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I picked up an FD-17 motor a couple of weeks ago as a winter project - 1963 Johnson 18HP. It was a toss-in on a craigslist ad: "Boat and motor w/o titles $300 - plus extra 18hp motor goes along". The other motor was a late '50s 35hp Evinrude but the seller had changed his mind and decided to keep it; I only wanted the 18hp anyway. I didn't look too close at it when I picked it up, figured even for parts it was worth the $100 I gave him.

Got it home and found a few minor issues and some pretty serious Billy-Bob engineering. The motor seems to have good compression, it shifts into forward and reverse and no suspicious noises come from the gear box even though a little water and milky looking oil drained out. Waiting for the seals and impeller before opening it up.

None of the carburetor linkage moved at all: choke, throttle, even the cam follower were stuck. A couple of days soaking in penetrating oil and they all freed right up. Haven't seen a fuel pump like that one in a while though. No fuel line connector either, just attached right to the filter.

Carb.jpg

FuelPump.jpg

FuelLine.jpg

Kind of a creative replacement for the prop nut:

PropNut.jpg

While waiting for various parts to arrive I decided to see what the ignition would do. The first time I checked it I was surprised to find it had a spark on one plug. Popped the flywheel off, cleaned and set the points - and nada, no spark at all. Almost seemed like someone was pushing the Stop button. Hmm, maybe those wires are a problem:

StopButtonWIres.jpg

After clearing that up I have good spark on both plugs - woo hoo!.

Next post will have a few more pictures and the only real problem I've found so far.
 
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tomhath

Master Chief Petty Officer
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Dec 5, 2007
Messages
814
Re: 18hp Johnson project

It seems the previous owner had some trouble getting it started. Everything under the flywheel was in good shape, but the worn wires grounded the ignition out. Apparently he just kept yanking on the starter rope:

StarterRope.jpg

It must have run good at some point though, because the steering bracket had been broken and welded back together. I suspect that's why the tiller throttle gear is missing. Fortunately I was able to find a replacement for both.

SteeringBracket.jpg

Apparently I have to pull the powerhead to replace it, so a paint job is planned too. Is there an easier way to replace that bracket?
 
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jb93

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Feb 21, 2008
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Re: 18hp Johnson project

Yes...easier way. Or at least I thought it was easier than removing powerhead, as that intimidated me. A little wordy to explain, but you can easily get it down to the following off this link Johnson Lower Unit Group Parts for 1963 18hp FD-17 Outboard Motor

Transom brackets 2x part #52
Swivel bracket part 65
Carry handle part 87
Pilot Tube part 86
Lower unit housing 2x part #21

Remove tiller handle and shaft inside powerhead that is turned to advance throttle by tiller. Part 48 here Johnson Powerhead Group Parts for 1963 18hp FD-17 Outboard Motor

Loosen upper rubber mounts each side 2x part #12
Loosen upper front mount part #33...up under lower pan between pan and carry handle part 87...can be tricky to get to

This should get you real close. I had a parts manual with schematics and service manual and this only took me 2 hours to complete, and this was my first time working on an outboard. I repainted my entire motor this way never removing the power head. I didn't paint under the cover where the powerhead is except for a few parts I removed.

I broke off a couple of bolts and my part #33 was cracked badly enough to need replacing. That slowed me up a little, but I think had a been more patient with the bolts I might not have broken any.

Here is a shot of my painted Fastwin. You can see painted front bracket and upper part of the lower unit housing. You can also see the different shade of blue on the powerhead. The cheap stuff from Duplicolor not quite a match. If I had it to do again, I would have sprung for exact match paint...but at $20 a can vs $6 a can I cheaped out. Shouldn't have. No one can tell until you take off the engine cover though.

I hope this helps you.

 

tomhath

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Dec 5, 2007
Messages
814
Re: 18hp Johnson project

Thanks for the reply. It looked like I could get to it from underneath, but I was concerned about hitting a dead end. A few days of soaking in penetrating oil should help those bolts.

The paint is probably as good as you can expect. After fifty years of weathering and oxidation an exact match isn't likely to happen. I'm sure that motor looks nice on the boat
 

tomhath

Master Chief Petty Officer
Joined
Dec 5, 2007
Messages
814
Re: 18hp Johnson project

Yes...easier way. Or at least I thought it was easier than removing powerhead...

Took it apart today. It appears you are completely correct, the powerhead isn't involved at all. Had to start at the bottom of the steering post and work up to the bracket but everything came right apart. Now to clean off 60 years of caked on grease so I can paint it and put it back together...:D
 

jb93

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Feb 21, 2008
Messages
267
Re: 18hp Johnson project

Took it apart today. It appears you are completely correct, the powerhead isn't involved at all. Had to start at the bottom of the steering post and work up to the bracket but everything came right apart. Now to clean off 60 years of caked on grease so I can paint it and put it back together...:D


Glad you got it. She'll look like a brand new motor. Here are a couple of links to exact match paint if you were interested in that.
Antique and Classic Outboard Motor Paint & Decals and Effena...You have arrived at THE Site for Vintage/Classic Outboard Motors, Paints and Paints NYMARINE has a nice selection of rubber parts and reproduction stickers too.
 
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