OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Victa Two Stroke Engines Should stator be electricaly separate frm flywheel

Hi All,

Please forgive my ignorance as I am a novice mechanic.
I have been fooling around with a couple of Victa 18 ignition systems. I found that both had faulty coils and one had a faulty condenser. I replaced one with a working ignition coil from an e-core and still no spark. I then disconnected the points and condenser and connected an electronic module. I got small voltage output but not enough to spark.

I have been wondering if the problem is with the stator core. Am I correct in thinking that the stator should be electrically isolated/separated from the crankshaft/flywheel? I have checked with a continuity tester and ohmmeter and get a reading from stator to crankshaft of less than 10 ohms on one and around 70 ohms on the other. Has the stator perhaps lost insulation?

Or does the stator core just need to have magnetism?

Any help would be greatly appreciated.
Thanks
Steve

No, no need to Insulate it, it needs to be grounded.

Where did the new ignition come from? (as in what mower)

Where do you have the points timed to?

Perhaps if you could pop up a picture of how you have it set up we could be a little more helpfull, often helps to see what's going on to get on the same page.

Thanks Ty,
Will try and load a photo soon.

Just to clarify, should the metal layers or laminations of the e-core/armature on which the black moulded ignition coil sits be insulated so that it forms one continuous path from one end to the other (and then to ground), or does the e-core/armature act just like one clump of metal, with no resistance from one point to another?

Hope the way I have described it is understandable.

Thanks
Steve

I think I just found my answer...the armature just needs to be a piece of iron capable of having a magnetic field induced within it by the magnets in the flywheel? The laminations in the iron are to minimise losses, but not absolutely critical?

Corect, the core is not to be insulated, it is essentually just there to help pick up the magnetic pulse in the coil.

Thanks again, Ty.

No worries mate, once you manage to get a few pictures up, hopefully we can be of more help.

Another important point with the ignition, is the timing, which is retarded 3mm from TDC, this means that when the piston is 3mm before the highest point in it's travel (remember, engine runs clockwise) this is when the points should just be starting to open.

Just line the piston up 3mm before the top of it's run, and adjust the position of the points till they are literally just about to part.

To late and it wont run very well, if at all, to soon, and it will rebound when you try to start it, causing damage and even injury.

Typo, Ty. It is 3 mm advanced from TDC (fires before TDC).

Thanks Grumpy, guess i was a little tired yesterday.

The timing is indeed 3mm ADVANCED, being the piston is 3mm BEFORE TDC when the contacts start to part.