i have a motor with no mount holes for the flywheel's coil. i was thinking of using some jbweld or other metal epoxy to fashion some mount holes. once dried and tapped i dont see why it wouldnt work. unless the heat or vibrations would be too much???

any thoughts.

JB Weld has very little metal in it, if any...It's not strong enough to be drilled and tapped anyway....Nothing will stick to the metal good enough....[8D]

What kind of of motor do you have buckeyes1997?

Sorry guy, but it will never work. Save yourself the grief of trying.

Good luck,
AV8TOR

okay i have this stuff called 5 minute steel made by versachem (magnum steel)
it says it is for bonding to
iron
steel
alum
copper
bronse
wood
plastic
brass

and can be
drilled
tapped
sanded
machined


it has a tesile strength of 9000psi
shear strenght of 1000 psi
compression strength of 18000 psi
and temp of 300F


it says its designed to fix cracks in casings and engine blocks etc.......why wouldnt this work. the only thing that scares me is temp and vibration?

Why wouldnt it work? Glues are wonderful nowadays but really, I dont know you from Adam and still would hate to hear a story of a guy that got a coil flung into his face because he glued it on. Appeling isnt it? Piper

Buck,

I may be mistaken but I don't think the JB Weld will stand up to the vibration.

You can do some unbelievable things with JB Weld but I would not think I would try
to make a coil mount with it. Although I did repair an outboard motor block with it
that's still running!
The coil mount needs to be adjustable anyway.

tommy s

that epoxy putty stuff is good but not good enough for mounting a coil!

make yourself an aluminium bracket with 3 or 4 "ears" or tabs bent back. the two bottom ears can be attached to the two front cylinder bolts and the top ear/s can be bolted to the head area of the cylinder. i did a stihl 009 like this many years ago. the top bolt went into the thick area right around the plug hole.


dave

do you have any pics zagnut. or maybe a drawing illustrating this?

i understand what i was asking about is probably dangerous, which is why i was asking. however if the only reason to not try something is because it is dangerous doesnt help me much. if there is a valid reason such as my metal bond would break down at the running temps of the engine for sure, or the vibrations would cause it to break. safety is always the overwhelming factor in anything we do.

thanks guys

Well, some things J.B. Weld just works great for, and others not. You have airplanes, and have probably used super glue (CA glue) right? Well, have you ever seen one drop pick up an elephant in reality like the old ads used to show???

J.B. Weld just is not hard enough to reliably be drilled and tapped. It can be used to help hold the cylinder sleeves in diesel engines, but it just would not hold onto a cylinder or crankcase, accept a drilled and tapped hole, and stay put. I guarantee it! If you had a crack or a small hole in a crankcase in a non stress area, you could clean it really well, put J.B. Weld on it, and it would probably last forever. But it just won't hold on its own in a high stress, or any drilled/tapped application.

Hope this helps,
AV8TOR

Got any photos of the coil and of the part you want to attach it to?

sorry, no pics it was a friends engine and i think it's been gone for years.

i actually used a piece of alum "u" channel for this. the vertical legs of the u were mostly cut away leaving just the tabs. the bolt in the cylinder head area went all the way through to the combustion chamber because i didn't let up on the drill in time all for the best because i didn't have a bottoming tap either


dave

This is old 18cc I was playing with.

I used Alumiweld to weld plate to the fins. Then drillled an tapped for some standoffs.

Worked fine, but this engine is too small to do anyting interesting with. So it sat out im my garage and is now all corroded.

If your engine doesn't have coil mounting lugs (one of the Poulans is like this) it is far easier and more desireable to convert it to Electronic Ignition. In the long run you will be far happier with the performance and reliability if you go this route. You will also save the weight of the flywheel which you won't need anymore.

Hey buckeyes1997! read the tread " gas fuel with glo plug, no ignition", where I experimented with gasoline/oil/methanol/ether I know it sounds complicated but believe me the engine runs even better than with its original ignition got more power and that is using a glow plug like the glo engines eliminated the flywheel and the coil, so read it and see if that will work for you, let me know what you think about it.