3p johnson 67 no spark

[SCG810]

Hi all, I know a lot of you are wizard on these engine so hopefully somebody can help. I have the 3hp folder (I thought these were rare in Sydney so a picked this one for $150 AUD next week eb_y $80 AUD bugger)I purchase a couple of months ago thinking of a new project after my first little 3hp was a disaster. So where I'm at is I have check all parts coil tested leads tested condensor tested gap 020 all ok, now I put the flywheel on and no spark at all. when I first tested before taking the flywheel of I had number one cylinder with spark. Now I stumped any help would be greatly appericated.


Steve

 

[1946Zephyr]

Re: 3p johnson 67 no spark

How did the coils look? If there was cracking, like in the attachments below, then you will need new ones. A bad condensor will also kill the spark on one or both cylinders too.

 

[SCG810]

Re: 3p johnson 67 no spark

Hi, No all the parts are good as new.

Steve

 

[1946Zephyr]

Re: 3p johnson 67 no spark

Hmmmm well something somewhere isn't making a contact. You can also check the boot connections and make sure they're clean. Sometimes these loose connectivity. Did you swap condensors to see if you get spark back in the other cylinder? If this doesn't change anything, then you might have a bad connection at the spark plug lead, where it goes into the coil. Sometimes if people change coils, they don't change the leads and if they use the old ones, they don't trim off the end to create a new connection.

 

[SCG810]

Re: 3p johnson 67 no spark

Hi this is a picture attached of the coils & our parts. I checked ohms on the leads and both .6 on the multimeter.

 

[samo_ott]

Re: 3p johnson 67 no spark

It looks good but something obviously has gone wrong. There's not much in there to go wrong so you'll have to pull it apart and check it all out again. You know it's not the magnet as you used to get one spark, so something else is wrong. And $150 for a folding 3 here is great. I've never seen em less than $400 or so locally...

 

[1946Zephyr]

Re: 3p johnson 67 no spark

Check the wiring that goes to the coils too, and make sure the flywheel hasn't worn through any of them. The little black ground wire and the green one that goes to the points can sometimes get in harm's way of the flywheel. Also, make sure your points are completely clean.

 

[SCG810]

Re: 3p johnson 67 no spark

Hi, when back and pulled the leads out checked them looked near new so I cut 10mm opps 3/8" of the leads and put all back together and pressto I have spark and a very health spark at that. Now on to the carby I'm sure I will be asking question as this so enjoyable I think I'm hook on these little fellow. I'm looking at a red & white 3hp Johnson on Eb_y so a bit of luck I'll have another.

thanks for the help.

Steve

 

[lindy46]

Re: 3p johnson 67 no spark

Great little motor and easy to work on. Good for trolling/fishing. Here's mine which I just finished refurbing.

 

[SCG810]

Re: 3p johnson 67 no spark

Very nice

 

[1946Zephyr]

Re: 3p johnson 67 no spark

Very nice oldie there lindy46. Mine aren't near as nice as that, but I have a '57 JW and a '65 Yachtwin.

 

[lindy46]

Re: 3p johnson 67 no spark

Very nice oldie there lindy46. Mine aren't near as nice as that, but I have a '57 JW and a '65 Yachtwin.

Yeah, they're great old motors. Now that I got the folder all painted, I'm hesitant to use it this summer. But then again, that's what its for - to use, not just to sit there. And I love the comments I get from other boaters when they see these old motors restored and running like they did 40+ years ago!

 

[1946Zephyr]

Re: 3p johnson 67 no spark

Yea, I have my HD-20 almost ready for paint. Right now, I'm looking for an upper gearcase seal for it, so I can get the lower unit all back together. That one, should run nicely, since the crank, pistons, rings and rods are all brand spankin' new.

I may just strip the paint off of the two little 3's I have up there and repaint them. They both run great, so I won't need to tear them down.

 

[kfa4303]

Re: 3p johnson 67 no spark

Here are some great links for your little 3 hp. The ignition link is a bi late, but still handy and the other is for a carby rebuild. It's a slightly different model, but the steps are virtually the same.


http://www.outboard-boat-motor-repa...on 3 HP 1952-1967 Ignition System Tune-up.htm

http://www.outboard-boat-motor-repa...hnson 5.5 HP 1954-1964 Carburetor Tune-UP.htm