I was cutting some ash for firewood yesterday and my J-red 2071 quit in the middle of a cut. Would'nt restart. Put it back in the truck and grabbed another saw. Pulled the plug this evening and found this. A new plug and she fired right up. Itr appears to be a dot of metal. Any ideas what caused something like this to take place?View attachment 221338
Seen this?
- Thread starter JimM
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bluestripes
ArboristSite Operative
I had one like that i thought it was just some carbon build up. Weird tho.
TonyRumore
ArboristSite Guru
I have never seen it on a saw, but I have seen it on a two stroke motorcycle many times. Usually referred to as "whiskered".
I am not sure what causes it, but on the motorycle that had chronic problems, it would only happen when the bike was run very hard for a long period of time. My buddy was running from the cops back in 1982 or so and after a long chase, he whiskered the plug on a steep hill and the cop rammed him from behind. He was 15 at the time.
I am not sure what causes it, but on the motorycle that had chronic problems, it would only happen when the bike was run very hard for a long period of time. My buddy was running from the cops back in 1982 or so and after a long chase, he whiskered the plug on a steep hill and the cop rammed him from behind. He was 15 at the time.
Loose carbon lands in the right place to shut it down. Happens more frequently than you would expect.
discounthunter
Addicted to ArboristSite
had that happen on my poulan,i chalked it up to be a sliver of metal from a muffler mod. apparently i didnt blow it all out before putting it back on.
fearofpavement
Trying them all
I have seen that on aircraft sparkplugs quite often and it is lead. Are you using avgas? Carbon is not very conductive and would not form that shape (in my opinion)
nick 55
ArboristSite Guru
Actually, carbon is an excellent conductor. I have seen carbon whiskers like that, and I have seen bits of molten piston do that too, but only on automotive engines when they were tuned way lean and with 30 degrees of timing.
Nick
Nick
No avgas, just premium pump gas and Husky oil. Not a big deal, I just have never had something like that happen before.
I hate when that happens! :bang:
So was it metal or carbon? Can you make a childs rattle out of your muffler is you shake it around?
I am not a scientist or physicis (see cant even spell that) so I won't get into the conductiveness of carbon vs metal et al.
Just trying to help you prevent a bad bearing or something damagain your saw.
I am not a scientist or physicis (see cant even spell that) so I won't get into the conductiveness of carbon vs metal et al.
Just trying to help you prevent a bad bearing or something damagain your saw.
Jim:
Had the exact same thing happenon my 038 the other weekend...started on full choke and triggered off choke two blips then dead. Tried a few times and nothing....pulled the plug cleared the plug with a oak leaf and cut a full tank. had a 036pro do the same thing years ago after about 4 tanks fuel. I think just loose carbon that gets jammed across the electrode.
sap can
Had the exact same thing happenon my 038 the other weekend...started on full choke and triggered off choke two blips then dead. Tried a few times and nothing....pulled the plug cleared the plug with a oak leaf and cut a full tank. had a 036pro do the same thing years ago after about 4 tanks fuel. I think just loose carbon that gets jammed across the electrode.
sap can
Itsme7
ArboristSite Operative
Carbon exists in several different forms, amorphous, diamond, graphite and bucky-balls or Fullerenes. Graphite conducts electricity because, like metals, there are "free electrons" in the material - these will conduct electricity. Electrons are not free in diamond and that form of carbon is not a conductor.
