Let's quit bashing this guys maxx, it's not very nice....really...
If you've only owned a maxx then it IS the greatest thing because that's all you know.

This is what the piston on my OS.18TM looks like after 1.5 gallons of Byrons 30% through it. Not bad at all, never ran above 240, never ran below 210. Sorry the pics are blurry, bad lighting

-Pete

oh and about the piston color, that was running lean aka too hot. dark brown (or better yet, light brown) is the color a piston should be after running at a good temp. (the piston will be green if you run Blue Thunder)

Black piston means= too hot. A grey, dry glow plug= too hot.

If it walks like a duck..............

What about my piston lol? its gold!
-Pete

Then you have been running E85 (corn based) fuel!

lol! Well atleast i'm not paying 26 bucks a gallon lol.
-Pete

LMAO!! Allright, sorry tex.

And I was right about too lean!! Wahoo! LoL That last piston looks good.

my pistons always look black like that and i never run my stuff too hot

if the color bothers you breaker....then take some wd-40 and a paper towel and rub the piston....thatll get some black off.

it works...I have done it before

Thanks bro! I love the OS.18TM, its a great motor and its really easy to tune. The piston was silver like it was out of the box until i hit 1 gallon. I guess just how it was ran affected it.
-Pete

Me too mike.... ( only my 528 gets hot and its still brown)

I had a modded Nova bs21sb and i ran it lean and the head was clean and pitted... OSrocket said it had be run lean thats what caused the head to pit... Because the engine was shimmed correctly

sounds right roc, nice new avatar

yeah his avatar's jugs just keep getting bigger and bigger....lol

I know isnt she sweet!!!!! Daphne Rosen..

I should take a pic of my 3.3 piston after 2+ gallons, it has a nice brown C on it and is not black whatsoever.

Get more opinions Mikey, trust me...ask on the grid.