Joe Hunt Magneto

jaszz · #1 (**permalink**) 07-04-2012, 05:23 PM

Once again i am having issues with this Mag on my evo rev tech 100 ci, Does anyone have pictures, instructions or any info on setting this mag back in the nose cone? There seems to be movement between the bottom gear and the cam on top, should there be any loseness? Maybe thats throwing the timing all off? it keeps backfiring through the exhaust like a gun shot. I tried to line it up using the tdc lines on the crank, but keep getting the backfire and it wont run. Any and all help would be most appreciated, i am close to the edge....
jaszz

RedWings · #2 (**permalink**) 07-04-2012, 05:56 PM

the looseness is the advance weights that move open at high rpm. Theres 2 marks on the flywheels, one is tdc and one is timing mark. set the points at .020-.022 and your plugs around .035. don't turn the mag over without the plug wires hooked up or you'll burn the coil.

jaszz · #3 (**permalink**) 07-04-2012, 06:12 PM

OK, how do i know where on the cam lobe the points should be so i can double check the gear placement, and where on the cam gear should i set the cam lobe, in other words, where on the additional play do i set the lobe? If it moves, do i go forward or backward till it takes up the play? The cam lobe has several edges, which is the one to set it from? the small end and where? The book calls for .18 gap on the plugs, do you still think wider?
This is my first venture into setting this up, i found that the mag was sitting up above the deck about a 1/8 inch, so when i loosened it up, it dropped down and must of messed up the timing. I must be off by a gear tooth or two, if its backfiring?

RedWings · #4 (**permalink**) 07-04-2012, 06:50 PM

I don't quite understand the play thing, if you turn the cam lobe by hand it should snap back by itself. The pointed lobe is #1 and the wide lobe is #2. Bring it up on TDC and push the mag in where you got room to turn the mag both ways and the #1 lobe is on the points arm (points open) and yeah I was in error about the plug gap, sorry bout that. Age is creeping up

cntrhub · #5 (**permalink**) 07-04-2012, 06:50 PM

I have no clue how to setup a mag. I'm going to just pick it up, follow wing's ignition window and points gap. I'm now going to advance the ignition and hold it there somehow. I now have full advanced locked.

There is now me holding the mag in hand. I'm now about to key in the gears so the crank is set at full advance in the window, my mag advance is at full advance. I now have no choice but to key the mag to the gear in the engine.

Make sense?

cntrhub · #6 (**permalink**) 07-04-2012, 06:55 PM

Because my points are fully open. I have to see I am one gear either way is how you have to figure out where full advance is? If I am hard to start, I am too retarded. If I am the one gear off, I am too advanced and it wants to start backwards or break my ankle as I kick thru.

Or it kicks right over, I am in between that one gear tooth. Those are your 3 gear tooth variable trying to time the mag. Make more sense?

jaszz · #7 (**permalink**) 07-04-2012, 08:07 PM

It all makes sense now, I will wait on some sunlight tomorrow and see what i can do. I need to do this, i cant afford to take it to a shop. Love the mag, have used it since 07, dont want to go back to electronics.

jaszz · #8 (**permalink**) 07-08-2012, 01:22 PM

OK, tried everything, rechecked timing, points, lined it up and now no anything, no backfire, no nothing. I dont seem to be getting a spark to the plug. Is there a way to test the coil and see if it is throwing a spark? If not the coil, then what else can it be? Condenser? Points? what would cause no spark? Any and all comments or suggestions will be most gratefully accepted.
Jaszz

RedWings · #9 (**permalink**) 07-08-2012, 01:35 PM

take a plug out , ground it against the head and turn the motor over. no spark and the coils bad if everything else is ok. btw, did you clean the little springs under the cap? and make sure they are actually making contact. Sometimes they have to be stretched a little bit.

Captain America · #10 (**permalink**) 07-08-2012, 01:47 PM

Make sure that the stud isn't grounded...that'll kill everything for sure.

RedWings · #11 (**permalink**) 07-08-2012, 03:07 PM

oh yeah I forgot that little booger

there should be a little nylon spacer in there and insulated washers.

jaszz · #12 (**permalink**) 07-08-2012, 05:05 PM

I checked, does not look like a spark is happening. Just to make sure, I took the grounding wire off the post to make sure the klll switch was ok, nothing changed. Dont see any indication of a spark across the point gap either? How frequently do you lose a coil? I will double check the springs again, but, it was running fine before this started. Is there a way to check coil output? dont want to order a new coil if its not the issue.

RedWings · #13 (**permalink**) 07-08-2012, 05:32 PM

yeah you can check ohms between the posts, can't remember the ohmage off hand, google it and check for ground from posts to mag case. The coils rarely go bad but who knows. btw, may sound stupid but is the shaft actually turning when you try to start it? and look closely at the inside of the cap for a hairline crack.

jaszz · #14 (**permalink**) 07-08-2012, 06:40 PM

Ok, i need to check the coil. I have a clear cap, and can see the points and shaft moving. I will try another cap that i have just to make sure on that end. WIll let you know. I am praying for something easy and inexpensive.

jaszz · #15 (**permalink**) 09-02-2012, 04:03 PM

uodate-finally found broken pin in gear at bottom of unit. Could never get timing right as it was moving target with the pin moving. Magnetos are nice, but i have to go back to electronics...too finicky