Blowers and coils

[Farside]

  Thanks for your post. I've really tried to follow as much as possible and have read every post. I'm not electrical /mechanical engineer but would believe a few of you are who helped with this post. I still have gotten a great education    Thanks to all who posted to help Mark T with his question and will continue to follow your project Mark T. 

[MarkT]

Mark, get something like this   You dont need a oscope.  This will be close enough for govt. work.  And it estimates voltage so you can compare machines or coils.

https://www.amazon.com/Deal%E3%80%91OriGlam-Adjustable-Ignition-Circuit-Diagnostic/dp/B06X9RC3PF/ref=pd_sbs_86_img_2/133-0320539-7602363?_encoding=UTF8&pd_rd_i=B06X9RC3PF&pd_rd_r=c61335e4-3b80-40e1-beeb-ff055dea3759&pd_rd_w=R466s&pd_rd_wg=YYXNN&pf_rd_p=5cfcfe89-300f-47d2-b1ad-a4e27203a02a&pf_rd_r=E6VG83CQW0QWZHK0G7AZ&psc=1&refRID=E6VG83CQW0QWZHK0G7AZ

THANKS!  Ordered one be here Monday.

[Firefight100]

This is from my Husgvarna 610.  It just started one day dying at idle on a trip.  Ran great but died at every stop.  I searched thru a ton of stuff on it.  And the spark looked good in the top picture.  But it wasnt enough.  This was an Iridium plug with 15 thousand miles on it.
The bottom picture is of the old original plug.  A lot hotter fire.  Installed that one back in and solved all my problems.
Moral of the story?  Yes it may have a decent spark but it needs a hotter spark.  And a blown engine needs even more.
https://drive.google.com/open?id=1f3li_jiSNBZrY23bUXx3xh1T2XFaW0LL

[MarkT]

The spark tester in today.  I was waiting for some JBWeld to set up.  Getting ready now for huge snow storm in tonite-tomorrow.  "Biggest in 3 years".  Up to 24" in elevations over 6,000, but this time forecast is worse for farther north, might be less here.  We're at 6580 (2005m). We usually get more than Denver as we're much higher. Also high winds predicted so there will be drifting deeper.  This one's dumping on SLC right now.  Another one coming in next weekend, smaller. Over the Oregon coast right now.  Won't be riding anytime soon.  Got the cars outta the way and the Kubota lined up so it's not under a drift.

With the tester connected to #1 it throws the spark 10mm.  Instructions say a good ignition should throw it 15mm.  Didn't try that.  Plugged in #1 and cranked - fired right up.  Smokey as I had just done a wet compression test - 170-180# on all cylinders.  No further testing still have reassembly to do. And clear the smoke outta the shop.  Just wanted to get preliminary test before I button it up - looks good at this point.

Had to fab a new air intake and filter.  The coils so much wider they intrude into the intake area.  The carb is aft of the blower and the intake/filter aft of that, alongside the right side coils behind the ignition switch.

[MarkT]

Finished up several tweaks needed to get room for the larger coils.  Cranked her over and she fired right up.  Starting problem gone - it was the weak spark from the OEM coils.  Apparently they failed from having to push a spark against the higher compression of the blower (?). The new VTX coils solved that.  Gotta mention, fitting them in there took more effort than expected.  Hope that doesn't happen again.