74transporter
New Member
and then saw this auction for ten of them for ten bucks. ####e.
10 X WIMA MKP 4 0.1uF 630V +/-10% FOR AUDIO CAPACITOR! | eBay
Reviving 031 spark
- Thread starter MnSam
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and then saw this auction for ten of them for ten bucks. ####e.
10 X WIMA MKP 4 0.1uF 630V +/-10% FOR AUDIO CAPACITOR! | eBay
flyboy
ArboristSite Operative
Use a business card for the coil gap. I use a 0.010" feeler gauge. You will break the flywheel if you do not use the proper puller. The puller is like $10 on ebay. The point gap is about 0.014" to 0.016". If you go wider than 16, it will not rev up.
MY saw has been running for several years (maybe 5 or so) with this mod.
chrisoppie
ArboristSite Operative
I dig your flywheel puller.... Nice! 
I dig your flywheel puller.... Nice!
Thanks, but yes I would recommend getting a proper puller. I have since done so myself and makes life much easier. Glad to see people are still finding this info.
74transporter
New Member
I went to my dad's last week and he said his saw didn't run anymore (saw in original posting). Cleaned the VERY dirty air filter and it's running well again. I didn't scold him too much, he is 70. I'm impressed by how well that saw still runs, and it does get some use. Between he and my brother, they use it and 2 other saws to cut about 10 cord a year.
I will soon be doing this repair to my 031. It has an omega module on it now, but it gets too hot and just won't rev to were I want it to.
I have a spare wima capacitor to use (Wima MKP4 0.22uF 630Volt 10%), but I do see these are getting a bit difficult to find. I have seen some potential replacements around:
Wima MKP4 0.1uF 630Volt 10%
Wima MKP10 0.22uF 630V 5%
I hope flyboy will add some info on here regarding these as maybe some optional replacements. These fit in with the capacitance range he specified (.1uF - .22uF), but I am unsure as to the "MKP4/MKP10" designation, perhaps that is just referring to the dissipation. Some are more spendy than others.
I will soon be doing this repair to my 031. It has an omega module on it now, but it gets too hot and just won't rev to were I want it to.
I have a spare wima capacitor to use (Wima MKP4 0.22uF 630Volt 10%), but I do see these are getting a bit difficult to find. I have seen some potential replacements around:
Wima MKP4 0.1uF 630Volt 10%
Wima MKP10 0.22uF 630V 5%
I hope flyboy will add some info on here regarding these as maybe some optional replacements. These fit in with the capacitance range he specified (.1uF - .22uF), but I am unsure as to the "MKP4/MKP10" designation, perhaps that is just referring to the dissipation. Some are more spendy than others.
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flyboy
ArboristSite Operative
I am pretty sure that both the MKP4 or the 10 will work correctly, just make sure the physical case size works.
flyboy
ArboristSite Operative
I just checked the data sheets, and they are both "Very low Dissipation Factor" capacitors. I am pretty sure the MKPxx 0.1uF to 0.22uF 630V x% will work. Some 031s were spec'd with 0.1uF and others with 0.22uF....(i think). I bet either cap would work just fine.
marineswarm
New Member
I just got my 031 av runnign with ELECTRONIC TRANSISTORIZED IGNITION MODULE NOVA II, now just tune the carb a little, but just FYI that worked, also, for me any way,
I lost spark......the guy at the shop said it needed a new condenser and points. The points look ok but I swapped out the condenser for a capacitor as listed above. I'm still not getting any spark. I pulled the wire off the kill switch and checked for nicked wires. Does it matter which lead goes to what on the cap? Any suggestions?
Hi, Want to thank everyone who supplied information on the Wima Capacitor fix.
Got an 031running for a coworker. Had more problems than the ignition but the condenser proved to be a real head scratcher. Engine would only turn 10,600 rpm. In a cut, had no power. Would run when cool but would get progressively worse till the point it wouldn’t start. Put the Wima capacitor in and runs great! Can get 12,000 rpm
now! Have mixture set to max out to 11,500 +/- Good power now!
Got an 031running for a coworker. Had more problems than the ignition but the condenser proved to be a real head scratcher. Engine would only turn 10,600 rpm. In a cut, had no power. Would run when cool but would get progressively worse till the point it wouldn’t start. Put the Wima capacitor in and runs great! Can get 12,000 rpm
now! Have mixture set to max out to 11,500 +/- Good power now!
I also have an 031 which I suspect has a bad cap. Can you tell me your source of WIMA .22uf cap ?
Found a supply of capacitors from Mouser Electronics. I did buy this year back in January.
They show 649 in stock.
Here’s the link.
http://www.mouser.com/ProductDetail...UdEF04FfYfw==&countrycode=US¤cycode=USD
They show 649 in stock.
Here’s the link.
http://www.mouser.com/ProductDetail...UdEF04FfYfw==&countrycode=US¤cycode=USD
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