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Thread: HELP: Oily Spark Plug Issue

  1. #1
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    Default HELP: Oily Spark Plug Issue

    One of my commercially used Chonda 78cc model 2008 with 35k km on the clock is giving me hard time. My rider has complained the engine stopped running all of a sudden and no matter how many times he tried to kick start the bike wont start.

    I thought the engine wasn't producing current but I checked and the spark was there. Then I unscrewed the spark plug and found it was oily. It wasnt only the tip of the plug but some oil was also on the threads of the plug as well. I cleaned it with a piece of cloth and examine the plug. The tip was chocolate brown as its suppose to be. even though there was oil on the plug but somehow it didn't burn and there was no carbon residue on the plug itself and the bike started in first kick after I cleaned it.

    An oily plug is suppose to look like this......but the plug I examine was not like this.
    HELP: Oily Spark Plug Issue - plugoil



    It was oily like this, infact after I cleaned it gently with a piece of cloth it looked perfectly fine.
    HELP: Oily Spark Plug Issue - plugbasah

    It worked fine for a few days and then all of a sudden same thing happened again and now its worse. It refuses to start every 2 hours or so. I checked the exhaust smoke..... I damn sure there is no white, black or blue smoke coming out of the exhaust.

    Judging by the symptoms, what do you think the problem might be?

    As far as I know if there is oil on the spark plug .....it means .......oil is leaking into the combustion chamber, .........which means its either getting there from worn out valve guides or rings....... But if that would have been the case there should be smoke and reduction in oil level, but everything is fine.

    Has anyone experienced the same before. What do you think I should do? I dont want to open up the engine as its a commercial bike and I really really need it on the road, otherwise I would have been mid way in the overhualing right now rather than creating this thread.

    Who can help? Do you think it needs a top end rebuilt. Im guessing head khullay ga. I will be really fu*ked up if it goes to the workshop in week days. I need a quick fix. Who can help? I'm desperate!

    I was thinking agar oil level kam ker doon engine ka to shayad temporarily issue resolve hojaye and weekend per rebuilt kerwa loon. Will it work?? Koi jugaar batao bhai!

    Bikes don't leak oil, they mark their territory.

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    ist he oily smell like petrol ?
    it happens when the mixture is rich.
    open carb and adjust it .. may be some jets are loose..

    try another plug as well..

    and make sure that valve clearance and timing is ok ..

    agar koi afaqa na ho ..
    then its good to go for tope end rebuild sooner .. other wies a lot will be damaged .
    but if engine oil is not reduced then i am sure its just mixture setting problem .and will be solved by simple carb tuning.

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    I had same issues with my CD 100 which needs overhauling.
    .. the jugaar for the time being i did is that i installed a plug adapter which prevents oil from coming over the plug.... do install that and see if it makes ant difference! it costs around 50 rupees.
    Keep ur Friends close ... And Enemies more Closer !!
    Honda CD-100 ==> Honda CG 125 Deluxe ==> Ravi Piaggio Storm 125 !

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    Default

    Quote Originally Posted by asjdsm View Post
    ist he oily smell like petrol ?
    it happens when the mixture is rich.
    open carb and adjust it .. may be some jets are loose..

    try another plug as well..

    and make sure that valve clearance and timing is ok ..

    agar koi afaqa na ho ..
    then its good to go for tope end rebuild sooner .. other wies a lot will be damaged .
    but if engine oil is not reduced then i am sure its just mixture setting problem .and will be solved by simple carb tuning.
    I was fiddling with the plug last night when I noticed the carb choke was loose, and the carb seems cleaner than the rest of the bike. I called the rider and he confirmed the first time the bike stopped he took it to a road side mechanic and he opened up the carb to clean it.

    I opened the carb.......the choke was loose and so was the center needle in the carb........choke tow tight hogaye sahi say but center needle it too loose. Maybe thats the issue why bike wasnt starting. I did what I could at night and luckily till yet the problem hasnt occured.

    What beats me though is what the oil was doing on the plug, and if the plug is covered with oil why isnt it burning it. I'm really confused. I changed the spark plug too.

    Timing check kerwani paray gee....but I checked the air fuel mixture......it was fine......not rich......the spark plug tip is chocolate brown.
    Bikes don't leak oil, they mark their territory.

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    Quote Originally Posted by venom View Post
    I had same issues with my CD 100 which needs overhauling.
    .. the jugaar for the time being i did is that i installed a plug adapter which prevents oil from coming over the plug.... do install that and see if it makes ant difference! it costs around 50 rupees.
    Thats a quick fix.....thanks man...will do that if the problem appears again.....filhaal tow sahi chal rahi hai.
    Bikes don't leak oil, they mark their territory.

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    It'll surely work .... i had exactly the same issues which u mentioned !
    After installing the plug adapter the bike never stopped again.
    Do give it a try ...
    Keep ur Friends close ... And Enemies more Closer !!
    Honda CD-100 ==> Honda CG 125 Deluxe ==> Ravi Piaggio Storm 125 !

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    Quote Originally Posted by venom View Post
    It'll surely work .... i had exactly the same issues which u mentioned !
    After installing the plug adapter the bike never stopped again.
    Do give it a try ...
    Will do that! Thanks again!
    Bikes don't leak oil, they mark their territory.

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    Default

    The loose needle (into needle Jet) could lead to intermittent flooding of fuel whcih seems the issue with ur bike. Get it fixed as well on priority.
    Exploring Machines is my Passion...

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    Quote Originally Posted by imranbhatti View Post
    The loose needle (into needle Jet) could lead to intermittent flooding of fuel whcih seems the issue with ur bike. Get it fixed as well on priority.
    Yep! It needs to be replaced. Will do that ASAP
    Bikes don't leak oil, they mark their territory.

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