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Post by cmcgrath5035 on Oct 9, 2008 6:04:15 GMT -5
I have a vintage C72 that I plan to rework next summer - am currently researching parts.
Anyone with experience replacing the coil-points-condenser with one of the solid state or electronic parts available?
Seems none of them specify C72 as targets.
Thanks
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Post by MCS on Oct 9, 2008 9:42:40 GMT -5
Hi cm,
Where are you finding replacement solid state parts? Saws like the SXL-AOs could be converted because Homelite used solid state on the later saws, but the "C" are just too old. A bit of information though, I pickup up an XL-12 that didn't have any spark. When I pulled the starter cover, I found a small module mounted by the coil. The wire from the coil that would normally be connected to the points was connected to this module. A second wire from the module was grounded under the same screw that grounded the coil. In design, this replaced the points and the condenser, well the condenser was not there, and I'm assuming at one time it worked. I put points and condenser back in that saw. Is there someplace that sells and something to like this that replaces the points?
Are you going to run this saw enough to warrant the conversion? Why not leave it with points and condenser?
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Post by edgeandengine on Oct 9, 2008 18:13:11 GMT -5
I know there are module kits advertised to work with nearly all small engines using point ignitions.
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Post by lesorubcheek on Oct 9, 2008 20:48:21 GMT -5
Yep, there's Atom and Nova modules. I prefer to stick with original points and condensor, but if ya can't find replacement parts, this is an option as long as the transformer is still OK.
Dan
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Post by MCS on Oct 9, 2008 21:15:13 GMT -5
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Post by lawnmowertech37 on Oct 10, 2008 13:05:46 GMT -5
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Post by MCS on Oct 10, 2008 20:12:44 GMT -5
Yes, have you had any experience with them? Do they seem reliable?
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Post by cmcgrath5035 on Oct 17, 2008 5:39:07 GMT -5
Thanks for comments and input.
Good question as to why change - saw has a history of points fouling over winter(when not in use), so I am primarily looking for a reduced maintenance solution.
And, since I have not opened her up in 15 years, just planning ahead a bit, not knowing what I'll find.
I have several modern engines with these solid state two wire modules, which seem to work real well- one pull starts.
How do they get their timing signal?
Simply fire at peak induced signal?
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Post by chainsawwhisperer on Oct 17, 2008 5:53:57 GMT -5
Transistorized black majic is what makes them work!
Some how they can sense when to fire, but I have heard that sometimes you may half to retard the timing a few degrees to get it right. I put one on a Solo 630 and sometimes it back fires through the carb when starting, making me think that the timing may be a few degrees off. CSW
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Post by sugarcreeksaws on Oct 17, 2008 8:03:39 GMT -5
I put a Nova module on an XL-12 and completely took out the points and condenser to prove to myself the saw did not need them. The saw runs smoothly and has great acceleration. They are worth a try on any saw where you are not able to find replacement points and condenser.
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Post by MCS on Oct 20, 2008 8:21:22 GMT -5
I started a new thread on Tutorials about this black magic module. If you are considering using one of these, don't cut the wire to the coil as the directions state - you may want to go back to points some day. Instead, remove the terminal at the end of the wire and pull the wire back and connect it to the Black Magic module and tuck it away - even Zip tie it - so it doesn't cause any problems. Of course you will have to remove the flywheel to do this. At the same time, remove the capacitor and put in away and mark it.
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