Bicycle Engine Spark Plug Lean Rich

Tan spark plug here s a pic of a tan spark plug as a guide.

Bicycle engine spark plug lean rich. Do we have an issue with the ignition timing or the oil ring. The rest of the spark plug innards typically will be black or dark grey. Running lean means that engine is not receiving enough gas and there is too much air. Sep 25 2017 image result for bicycle engine spark plug lean rich.

The rich one is right but the lean and optimal should be swapped round a lean mixture increases the heat of combustion and tends to glaze the ceramic of the spark plug and burn off any deposits that may have accumulated leading to the very white clean insulator on the right of the picture. Motorized bicycle engine kit forum. Yeah there s fuel but o2 sensor doesn t detect fuel. I m with you though i don t know if a spark plug occasionally not firing would effect anything enough to cause the pcm to make a.

Running 15 1 fuel oil ratio still while running in i was too slow to edit the original post to. The whitish color on the rear of the insulator is the original ceramic color showing through because the plug hasn t done many km about 10 20 minutes not a sign of a lean mixture. Thats right with about any 2 stroke cycle motor leaner will make it run hotter and ritcher should make it run cooler easy principal to figure out 2 strokes use the oil in the gas to lubricate the lower end of the motor as well as the cylinder walls and rings. So it would tell the pcm it s lean pcm would add fuel to compensate creating a rich running car.

This leads to poor gas mileage spark plug fouling and loss of engine power. You are currently running too lean. Pretty sure your plug labels are incorrect. Oct 21 2016 running rich vs running lean running rich means the engine is receiving too much gas.

Are we running lean or too rich. Gasoline engines rely on the spark plug to deliver the spark that will ignite the air fuel mixture in the combustion chamber. Please practice hand washing and social distancing and check out our resources for adapting to these times. This leads to high rpms and lack of engine power and response.

Sep 25 2017 image result for bicycle engine spark plug lean rich. Discussion in norm s 2 stroke repair center started by xnicklopezx aug 12 2011. What some of us don t understand is that the spark plug can tell us a lot of things about our engine.