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Thread: spark plugs turning black and engine dies

  1. #1
    Join Date
    Feb 2012
    Location
    Elgin,OK
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    28

    spark plugs turning black and engine dies

    On my 82 honda 185s i put a new white spark plug in it and fresh oil change and it started up just fine one pull, so i rode it around for 10 mins till it died. I pulled the spark plug and it was solid black, my question is since the plug is turning black does that mean the piston rings in the motor are bad/going bad or wat can i do to fix this solution?

  2. #2
    Join Date
    Feb 2012
    Location
    washington
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    83
    new rings time you could try a thicker oil, but eventually rings are the only solution

  3. #3
    briano is offline Got The Holeshot Arm chair racerJust too addicted
    Join Date
    May 2010
    Location
    Michigan UP
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    1,005
    Does it burn oil? What plug are you using? Put an NGK in it if you don't have one already, my Hondas will not run on Champions for some reason, only NGK. Is the choke shut off?

  4. #4
    Join Date
    Feb 2012
    Location
    Elgin,OK
    --
    28
    It doesnt burn oil and i just put a new ngk plug in it and i start it with choke on then turn the choke off once it starts up

  5. #5
    Join Date
    Nov 2011
    Location
    East Greenville, Pennsylvania
    --
    465
    Runs rich if the plug is black. If its white it's lean. You want it light tan
    1985 Kawasaki Tecate 250 with kx 500cc motor
    1985 Honda ATC 70 custom built with lifan 125cc
    1985 Honda ATC 70 custom powder coat slight mods
    1985 Honda 250sx
    Yamaha zinger 90cc 2 stroke
    1985 Honda 250sx custom green and black build
    1985 Honda 200x

  6. #6
    Join Date
    Nov 2011
    Location
    East Greenville, Pennsylvania
    --
    465
    Stock jets?? Is the bike stock? If so than may need rings also.
    1985 Kawasaki Tecate 250 with kx 500cc motor
    1985 Honda ATC 70 custom built with lifan 125cc
    1985 Honda ATC 70 custom powder coat slight mods
    1985 Honda 250sx
    Yamaha zinger 90cc 2 stroke
    1985 Honda 250sx custom green and black build
    1985 Honda 200x

  7. #7
    Join Date
    Jan 2011
    Location
    south bristol ny
    --
    43
    little known problem with the 185 and 200 hondas the jet needle/needle jet assembly wears and allows a over rich fuel condition an easy way to ck if this is your problem start her and warm it enough were the engine will idle then turn your fuel mixture srew in till it seated if the engine still runs these jets are allowing fuel through replace them and your good to go. i have fixed alot of these this way when people think they need rings good luck

  8. #8
    tapage is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Mar 2012
    Location
    Montrose, IA U.S.A.
    --
    166
    Quote Originally Posted by pistolpete88 View Post
    little known problem with the 185 and 200 hondas the jet needle/needle jet assembly wears and allows a over rich fuel condition an easy way to ck if this is your problem start her and warm it enough were the engine will idle then turn your fuel mixture srew in till it seated if the engine still runs these jets are allowing fuel through replace them and your good to go. i have fixed alot of these this way when people think they need rings good luck
    i wish i would of known that, i think thats what happened to mine

  9. #9
    Join Date
    Jun 2011
    Location
    lincoln
    --
    25
    Quote Originally Posted by STiForester View Post
    Runs rich if the plug is black. If its white it's lean. You want it light tan
    You're running too rich. waaaaaaayy too rich.

  10. #10
    Join Date
    Feb 2012
    Location
    Elgin,OK
    --
    28
    i ordered a new carb kit w/ needle jet and installed it, i also just picked up a new spark plug to retry this process im thinking it will work but ill let you guys know

  11. #11
    tapage is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Mar 2012
    Location
    Montrose, IA U.S.A.
    --
    166
    i think mine may need a bored head and new piston and rings, startin to shoot smoke

  12. #12
    Join Date
    Feb 2012
    Location
    Elgin,OK
    --
    28
    heres a update i put a new spark plug in and started it up, it wont idle and i screwed the idle adjustment screw all the way in than it idled to where it was bearly running (sounds as if it was gonna die but didnt) and when i rev'ed it up it would bog out. So im thinking to much fuel again, it also is smoking blue smoke. where should I go from here, its a new carb all new oem jets and neddle jet. Could it be clogged again or is the jets to big once again

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