Flywheel magnet remagnetizing

[Richard Stuber]

I have a 57 Johnson 35HP RD19 that I can’t coax a spark out of after having replaced the coils, points, condensers, and plug wires.  How to I determine if the flywheel magnet is sufficiently strong?  Can it be remagnetized if weak?  Flwheel shows signs of former heating and hammer blows.

[frankr]

Magnets made after WWII just don’t go bad. Period. Look for something else.

[crosbyman]

just  approaching a screwdriver  close to magnet will  snap it place…. like FR indicated… magnet s are ok

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[PM T2]

Make sure the points are connected to the correct coil. Its easy to mix them up, especially if you changed everything on t he mag plate.

Best,
PM T2

He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...

[elgin2]

Make sure the eccentric screw is working. Some new points have a hole too large for it to work properly.

[reivertom]

Check the ground as well.

[crosbyman]

burnish the points  and  clean with  acetone or alchool  on a strip of paper

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[Richard Stuber]

Thanks for all replies especially assurance that magnet is okay and ho to verify that.   I’ll check wiring again carefully and report back.

[crosbyman]

did you perform a resistance test between the plug boots and frame ground to confirm all is ok     each coil should read  between 4-8 kohms approx. depending on manufaturer

did you adjust timing per this video

http://www.youtube.com/watch?v=ga1Cjymj6ms&feature=youtu.be

condensers  are tricky  and may…. be bad  even new ones .  you can do  a “basic” test for  shorts  or open but the real  leak test is  done   with high voltage  (250vdc +)  if you  have  testing eqpt.

the western region AOMCI has excellent articles by m.Mohat

see articles 1-4 on condensers … how to test  and   fixes

 

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[Richard Stuber]

Disassembled everything today and started from scratch following Seloc Volume II from pp 5-5 through trouble shooting and final assembly pp 5-25.  No fire yet.  Have watched the video per crosbyman and will give that a whirl tomorrow.  Condenser capacitance measures nominal but I am not equipped to test for high volt breakdown.  Can try a change out for good measure as necesssary.

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