1939 Thor / Sea King Magneto, etc.

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Buccaneer
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Re: 1939 Thor / Sea King Magneto, etc.

Postby Buccaneer » Fri Apr 13, 2018 4:53 pm

I finished putting it together and tried a "bench" run.
The first, second, third, fourth pulls were hopeful.
Kept opening the carb needle a little at a time,
until I decided it was flooding. Longest I had it
running was about 3 seconds. :(
Then it was lunch time. I haven't done an actual
compression test on it, but know now that it has
rings on the piston, it's better!
Right now the little Thor built engine is like the
"God of Blunder"...... perhaps tomorrow it
will be mighty once more?
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bobw
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Re: 1939 Thor / Sea King Magneto, etc.

Postby bobw » Fri Apr 13, 2018 6:37 pm

Can't be long now! Sure looks great too!!
Bob
AOMCI Member

1954 Johnson CD-11
1958 Johnson QD-19
1972 Evinrude 25202

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Buccaneer
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Re: 1939 Thor / Sea King Magneto, etc.

Postby Buccaneer » Fri Apr 13, 2018 8:23 pm

Did a compression test. First pull at 60 psi, topped
out at 67 after third pull. I would think that would
be enough compression to start it, but I'm thinking
there's a little too much "drag" between the power head
and lower unit.
I'm going to make a plate to bolt on the flywheel puller
holes so I can spin the engine over with a drill.
The flywheel taper is precarious enough, so I don't
want to spin the engine with the flywheel nut.
Hopefully spinning it over with the drill will start and loosen up
the engine and drive train a little more,
or loosen it up more, then start!

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Buccaneer
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Re: 1939 Thor / Sea King Magneto, etc.

Postby Buccaneer » Sun Apr 15, 2018 2:42 pm

Tried starting the ThorKing yesterday with the drill.
Sounded like it was firing interminttently,
at times. I had better luck the first day trying to start it
with the rope...... it actually stayed running by itself about
15 seconds. Yesterday, as soon as I let up on the drill it would die.
Decided today to re-check the compression while spinning it
over with the drill, and watching the spark plug at the same time.
Noticed that it sparked good at first, then not at all, then once
in a while. Compression maxed out at 73 psi.
Pulled the flywheel to see what was up with the spark.
I found out that they don't make JBWeld like the use to. :o
Keyway was wallowed out again, key cocked sideways,
cam wiggled back and forth about 1/8" on the crank, and
JBWeld "dust" all over.
I may have to box up the little Sea King and send it to Mumbles
to fix the keyway. :-) or go to plan B!
The story goes that Carl Kiekahfer used crankshafts out
of WaterWitch's to get the Wards rejects going for re-sale.
I have a single cylinder, froze up, parts Water Witch, just wondering
if it's possible it's crankshaft would be a "swap" for my bad crank??
The "I think I can" video....
https://youtu.be/R-tMDv_mZ6M
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Tubs
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Re: 1939 Thor / Sea King Magneto, etc.

Postby Tubs » Mon Apr 16, 2018 1:52 pm

Buccaneer wrote:The story goes that Carl Kiekahfer used crankshafts out
of WaterWitch's to get the Wards rejects going for re-sale.
I have a single cylinder, froze up, parts Water Witch, just wondering
if it's possible it's crankshaft would be a "swap" for my bad crank??


I'M sure I have a crankshaft in a box of Waterwitch parts for one of them.
Not sure its condition. I can dig it out and post a picture with some
dimensions to see if it would be worth getting into your motor if you like.
Or I can just send you the one I have if you think it would work.
Image

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Mumbles
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Location: Victoria BC

Re: 1939 Thor / Sea King Magneto, etc.

Postby Mumbles » Mon Apr 16, 2018 2:00 pm

What kind of cap is that sitting on the condenser? It looks too small to be an Orange Drop.

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Buccaneer
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Re: 1939 Thor / Sea King Magneto, etc.

Postby Buccaneer » Mon Apr 16, 2018 6:38 pm

Mumbles,
Regarding the caps, I'm not sure what the original "orange drop" cap was,
but I've been using these from Digi Key......
======================================================
0.2µF Film Capacitor 400V Polypropylene (PP), Metallized Radial
Digi-Key Part Number P12106-ND
Manufacturer Part Number
ECW-F4204JL
=======================================================
Tubs, Regarding the Water Witch crankshaft. I have a "froze-up" Water Witch
I could tear down to compare, should I decide to go that route.
Was laying in bed last night thinking about it, but now that I have
my new main bearings "fit" to the current crankshaft, and
the crankcase hermetically sealed, I decided to hold off on that idea.
Instead, today I tack welded the key in the crankshaft with the
mig welder, then spent a while with the air grinder getting rid
of excess weld.
Put the mag back on, and no spark. :-(
Got the Stevens tester out of winter's hibernation and the coil,
and cap tested good. Re-cleaned the points, and it seemed to
spark great spinning it over. Put the carb and fuel tank back on.
Wrapped the rope around and gave it a mighty pull. Nothing.
repeating that about 25 times, and never fired once. :o
Before I put the carb back on, I gave the crankcase a good shot
of fogging oil, but I don't think that's the problem.
Squirted gas in the spark plug hole, and still nothing.
Back to the drawing board tomorrow.
If it doesn't run soon I'm sending it back to Wards for warranty work!
Last edited by Buccaneer on Tue Apr 17, 2018 8:35 am, edited 1 time in total.

gary
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Re: 1939 Thor / Sea King Magneto, etc.

Postby gary » Mon Apr 16, 2018 10:34 pm

I had a problem with mine . weak to no spark. I had the magnets recharged and had good spark.

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Buccaneer
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Re: 1939 Thor / Sea King Magneto, etc.

Postby Buccaneer » Tue Apr 17, 2018 8:40 am

Gary, the magnets "seem" okay. I do have a charger, so I could
try "zapping" the flywheel if I can come up with the right blocks
to fit the flywheel.
Thanks.

Simoner1
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Re: 1939 Thor / Sea King Magneto, etc.

Postby Simoner1 » Wed Apr 18, 2018 3:40 pm

I noticed you mounted the modern capacitor in parallel with the old capacitor? or is the old capacitor no longer connected to the terminal?
Just curious as to whether you now have two capacitors in parallel and the impact this may have on the charge/discharge cycle.


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