Husqvana 61 No Spark

[Mainspring]

Hello,
Can anyone help me with a Husqvarna 61 chainsaw ignition problem?
It was working fine but overheated near the primary coil and wouldn't start again.
I thought the primary coil had burnt out so ordered a new one.
I failed to note how it was connected up so when the new one came (they sent both coils) I re-assembled connecting the 2 yellow wires together, the long black one to the killer switch and the short black wire on the secondary to earth. I also bought a new a new spark plug.
Now I can't get any spark at all.
Anyone help please ?

 

[Bob Hedgecutter]

Explain "overheated near the primary coil" for me.
Do the flywheel magnets still show strong magnetism?
Correct air gap between primary coil and flywheel magnets?
Disconnect black wire from kill switch and check for spark.
Switch either screw or wire lead earthed to case?

Didnt, by chance use a sharp tool (small screwdriver?) to insert yellow wire from primary to trigger unit, where the small self tapper joins the two yellows, into its case track under the flywheel?

 

[Wood Doctor]

I ran into this also and replaced the coils one at a time, looking for a spark each time. Only one was defective and that's all it needed.

 

[Mainspring]

Thanks for the responses.
To answer Bob's questions:
It had been working hard for a couple of hours and it smelt hot when a small amount of smoke came from under the front end of the pull start cover. I gave it a rest for a few hours and tried starting again but it wouldn't fire. I removed the cover and noticed the yellow wire from the primary coil was a bit brown so I assumed the primary had been damaged. There was oily sawdust everywhere so I cleaned it all out and sent off for a new primary.
The flywheel magnets are still strong.
When I fitted the new primary, I used a 0.4mm plastic shim to set the gap.
The kill switch seems fine. I disconnected the black wire spade and checked for continuity.

The new primary came with a new secondary so I fitted both - and a new spark plug.

When checking the kill switch I noticed the long black wire from the primary was permanent earth - presumably via the fixing bolts on the primary. I thought this was wrong so used fibre washers and isolated it from earth. Still no spark !

 

[Bob Hedgecutter]

Check you have not pinched the long black wire headed to switch with the starter cover and torqueing down the fixing bolts- could be permanently earthing the system to the case- before the switch- ie: same as trying to start the saw with the kill switch in the stop position- not run, therefore no spark.
Can also be a faulty kill switch- circuit not opening despite switch position.

 

[Bob Hedgecutter]

I am assuming this is one of the new aftermarket twin coil packs?
I have no experience with these yet so cannot advise as to if they are any good, no good, or a lottery- with some good, some bad.
Usually its the trigger pack that fails first- but you say the primary got smoking hot- so guess there is no point trying original primary with the new trigger.