Johnson 6 Project

[LaqueRatt]

So finally getting around to reviving a little OMC I've had in the shed for a year. So far all I know is it has no spark on either cylinder. Motor has no kill switch, so guess it's time to pull the flywheel. With no top mounted pull start, there doesn't seem to be any threaded holes. So am I stuck with the hammer/pry bar method of removal? There are 4 blind holes that aren't threaded. Tempted to run a tap into a couple so have something to bolt the flywheel puller to. Anybody got any better ideas?

 

[MDCrappie]

Can you get one of those 3 armed pulley pullers on that pull from the edge?

 

[LaqueRatt]

Probably could, is that OK to do though? I'd hate to mess it up.

 

[MDCrappie]

I would think it to be OK as long as you don't damage any of the teeth. Or if pulling from top don't damage the rope groove.

 

[Lerie]

From your pics, it looks like there is a nut that holds the fly wheel. Removing that will possibly reveal the threaded holes for the fly wheel remover. I have some old OMC manuals. If you can tell me the year of motor or the Model number I may be able to figure that out and offer further assistance.

 

[Sea Antsy]

I would think it to be OK as long as you don't damage any of the teeth. Or if pulling from top don't damage the rope groove.

Here is what your dealing with... https://www.ebay.com/itm/233645932526
and I know.. cuz this is MY listing..
a large ice cube made in a dixie cup sat on the nut for 1/2 hr b4 I used the impact wrench... have fun...
they are GREAT little engines...I have had a few..

 

[LaqueRatt]

From your pics, it looks like there is a nut that holds the fly wheel. Removing that will possibly reveal the threaded holes for the fly wheel remover. I have some old OMC manuals. If you can tell me the year of motor or the Model number I may be able to figure that out and offer further assistance.

 

[LaqueRatt]

Thanks gentlemen. Never would have expected to find threaded holes under the center bolt. It does seem like a nice little motor. So simple it's almost amazing. Compression is pretty good too, 80/80.

 

[LaqueRatt]

Flywheel came off without too much trouble. Everything on this motor looks clean. All the ignition parts test good, but the resistance was high across the points when closed, so that was likely why she wasn't sparking. Cleaned them up and set gap. Going to take a stab at setting the actual timing.

One concern is one of the coils has a visible crack in it. Should I run it or is this one of those deals where it's going to stop working when the motor gets good and warm?

 

[Sea Antsy]

Oh they are cheap enough... but b4 you get it wet dribble some more epoxy around the crack and have fun, what ya gotta loose

 

[LaqueRatt]

I was actually thinking that myself. Thanks for the suggestion. One of these has obviously been replaced, is it the cracked one? Must be pretty low quality. I have another good used OMC coil, but am not looking to drag out the project. Just want to get it running and on the transom of my Elgin. Idea is to use it a bit and decide if it's a keeper or not.

 

[LaqueRatt]

So everything ignition related has been checked, cleaned, and set. Still no spark. Suggestions?

I'm going to clean the points with lacquer thinner just for gits and shiggles, but I've done the old business card trick so they should be fairly clean.

Guess it could be the plug wires, but they are at least making a somewhat decent connection because I went through them to test the secondary windings on the coils. Just seems weird to me when you don't have spark on either cylinder. They are pretty much independent of each other, right?

 

[Sea Antsy]

So everything ignition related has been checked, cleaned, and set. Still no spark. Suggestions?

I'm going to clean the points with lacquer thinner just for gits and shiggles, but I've done the old business card trick so they should be fairly clean.

Guess it could be the plug wires, but they are at least making a somewhat decent connection because I went through them to test the secondary windings on the coils. Just seems weird to me when you don't have spark on either cylinder. They are pretty much independent of each other, right?

try this ...https://www.youtube.com/watch?v=daPvPCSTjdQ

 

[LaqueRatt]

Google says: This video isn't available anymore

Hate it when that happens!

 

[Sea Antsy]

Google says: This video isn't available anymor

Hate it when that happens!g

opps... well just Google checking outboard magneto with battery... it's just using a flashlight battery to drive current thru the primary of the coil BRIEFLY then when you disconnect it the magnetic field you created collapses and you get a spark on the secondary to ground..yea.. majic

 

[LaqueRatt]

Success!

 

[Sea Antsy]

Success!

SO... what was the issue

 

[LaqueRatt]

I did the old clip a 1/2" off the wires near the coil trick and replaced the one cracked coil with a known good one. Pretty sure the issue was the wires not making good connection with the coils.

 

[thill]

Nice. Congrats!