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General Category => General Discussion => Topic started by: zari on June 08, 2018, 01:57:24 PM

Title: fouled spark plag left side
Post by: zari on June 08, 2018, 01:57:24 PM

hello
navada 750   model  94   after  carb cleaning ,  Compression  left  189   right  192  ,  not perform  leak down  test, valve adj  o.k
but  got   fouled spark plag dirty dark  after  cleaning  got  some good  ride  but  for  short  time 

please   HELP !!! :copcar: :gotpics:
(https://thumb.ibb.co/bN15Ho/plug.jpg) (https://ibb.co/bN15Ho)

Title: Re: fouled spark plag left side
Post by: guzzisteve on June 08, 2018, 03:06:05 PM

Stock carbs?  Could be float level, worn jet, oring sealing choke. Could also be a worn valve guide giving it a bit of oil.

Title: Re: fouled spark plag left side
Post by: Kiwi Dave on June 08, 2018, 03:54:34 PM

Try swapping over the spark plugs, leads and then coils one at a time to see whether the fault shifts to the other side.  If it does, you have your suspect.

Title: Re: fouled spark plag left side
Post by: Chuck in Indiana on June 08, 2018, 04:20:58 PM

Looks fuel fouled, so..  :smiley:
I'm betting ignition on this one. Bad plug/loose or corroded plug cap/ bad connection at the cap or coil.
Edit: forgot you said you cleaned the plug. In my experience, once a plug is fouled, just throw it away. They're cheap..

Title: Re: fouled spark plag left side
Post by: pete roper on June 08, 2018, 06:14:43 PM

Is the choke plunger seating correctly on that side? Have you got free play in the cable? See if the cable has allowed the outer to drop out of the splitter and hang up.