How does the number of valves per cylinder affect engine performance?

Jan 9, 2006 ... You could end up with a large amount of carbon ... improper jetting, wrong plug, dirty air filter, low compression, poor fuel, weak spark. Jul 4, 2016 ... Boat: 2001 Sunsetter Lxi, Engine: Indmar 5.7L 325 Monsoon, Hours: 200+. Upon changing spark plugs, discovered 2 out of 8 plugs are fouled. May 3, 2014 ... Prevent spark plug fouling due to oil & carbon build-up. Image. Save ... I fouled out another set of plugs, What would cause this, Tried adjusting ... Aug 18, 2001 ... Rich mixture and or rich main jets can cause the carbon/plug problem but if its really bad enough to cause a problem you should see black smoke. Jun 5, 2016 ... I've heard that black carbon on the spark plugs is normally caused by a rich fuel mixture. This can cause the mixture to wash down the cyl. Sep 22, 2018 ... If all of the spark plugs show heavy dry carbon fouling, the rich fuel mixture may be caused by too much fuel pressure (check for a defective ... Jun 2, 2021 ... Could it be that an excessively rich idle mixture causes carbon fouling, then the lack of spark allows oil to accumulate? I just want to be ... May 31, 2011 ... The carb is new out of the box and it was making all the plugs black carbon. ... dont use the old lead fuel pic s of spark plugs to read ... Oct 21, 2011 ... I believe if the engine is running too rich at some point it can cause a rich misfire condition in which the HC levels begin to rise along with ... Jun 10, 2012 ... The bike keeps fouling the spark plugs (NGK B6HS). After 2 days of riding (+/-100 miles) they both become carbon fouled, the bike started farting and ...