Sparkplug colour

[Speedloader]

Hi,

So im done with my first tank with new engine. Carburator settings on WT-771:
L: 1+1/8 out
H: 2 out

Engine: TS Reed case, ESP 30.5 reed ported cylinder.

I think its too rich but with the 3 first tanks it better be too rich.

What do you think of the sparkplug colour?

 

[FedsRevenge]

I use this image as a reference when comparing spark plugs.

 

[Speedloader]

View attachment 52499

I use this image as a reference when comparing spark plugs.

Thanks, i would say it looks like pic 6 or 7.

 

[Seandonato73]

It looks a tad ritch but it's hard to read a plug with oit cutting it in half to look at the whole insulator.

 

[DougStar]

It looks a tad ritch but it's hard to read a plug with oit cutting it in half to look at the whole insulator.

??

 

[Seandonato73]

I'm being serious to read a plug you need to look at the whole insulator to get your low and high rpm read. Not the article I was looking for as it doesn't pertain specifically to 2 strokes.
https://www.dragstuff.com/techarticles/reading-spark-plugs.html

 

[Polar_Bus]

Don't waste time accessing spark plug color during break-in. It's in NO way going to give you a true readout of your overall tune. That engine needs a few "cleanout" high speed runs, then a fresh plug with some time on it to be able to accurately read color.

 

[Speedloader]

Will change the plug after a couple of tanks and lean it.

 

[Z.hb71]

I'm being serious to read a plug you need to look at the whole insulator to get your low and high rpm read. Not the article I was looking for as it doesn't pertain specifically to 2 strokes.
https://www.dragstuff.com/techarticles/reading-spark-plugs.html

This ^^^^

 

[Polar_Bus]

Reading plugs is a real hardcore science and you need a light magnifier to do this correctly. Reading just the insulator color is not telling you the whole story. All's a dark tan insulator color is telling you is that the plug's heat range is correct. Observing the very tip of the electrode is a better way to get some type of idea how your jetting is. I like to see a slight white ring around the outside perimeter of the electrode tip , if your electrode is black and sooty all the way to the tip that's rich. I also look at the soot around the outer metal body of the threads. When I see black soot that's also rich. I like to see minimal soot. These are just my opinions on how I try to read plugs. I'm NO expert, I jet (or tune) according to plug color, piston wash, and "listening" to the engine tone at WOT. Tuning an RC is tough as you can't "feel" performance losses or gains, you have to more rely on engine rpm sound.

 

[Chillin4life187]

This was from a recent final break-in run on a new CY29cc (stock). This was on a 90 degree day in arizona after approx an hour of runtime. Engine tune was spot on. This is what your plug should look like and get slightly darker (just not like soot) as run time increases.
Sorry for the difficult to see pic. The camera on my phone sucks close up. doesn't zoom in very well.

 

[Speedloader]

This was from a recent final break-in run on a new CY29cc (stock). This was on a 90 degree day in arizona after approx an hour of runtime. Engine tune was spot on. This is what your plug should look like and get slightly darker (just not like soot) as run time increases.
Sorry for the difficult to see pic. The camera on my phone sucks close up. doesn't zoom in very well.

Today mine looked like this, still in breakin. 2nd tank.

 

[Chillin4life187]

Looks much better. Your still running a little on the rich side but for the first few tanks while you break her in, thats reccomended. Once you break the motor in you can lean out a little bit and get that perfect tune. Just don't lean it out too far otherwise your gonna damage the engine. I generally run two full tanks of fuel (motorsport ms100 race fuel from VP) through the engine and thats usually enough for break in. I can generally get a feel for the engine and tune. Anything more then that I think is just a waste of time and excessive in my opinion. Rings and the motor will settle by then and find its groove, trust me. Luckily, I was also blessed with the natural ability to tune & tinker engines. I know it can be a challange for many or the inexperienced. luckily you have this site aa a good refrence with many on here that have experience with tuning and small engines. Ive always run the hell out of every engine, dirtbike, streetbike, rc car and all the other toys in the garage and haven't had an engine problem yet. In case you have any dounbts in the info Im sharing. Just my 2 cents. Best of luck to you and have fun..