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2007 SX210 Spark plug issues

jgn1013

Member
Messages
14
Reaction score
7
Points
22
Boat Make
Yamaha
Year
2007
Boat Model
SX
Boat Length
21
My port engine spark plugs look like this after only 20-25 hours of use. The ECU has been replace with an used one, but I'm still seeing the same issues, anyone have suggestions on how to fix this problem? I even switched the ECU out with the starboard engine and still same problem.
IMG_0352.jpg
 
I would recommend checking the fuel injectors.
 
I do not see the problem. Please, explain!
 
check the fuel injectors for what?
Sticking injector - the plug indicates it's running a bit too rich. Are all your plugs too dark, or just one? If just one, a sticky injector is pumping too much fuel into the port.
 
Possibly a bad stick coil(s). Move the stick coil(s) to the other motor and see if it follows it.
 
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