Enough oil or not?

hereismylife

hereismylife

Active member
Joined
Dec 27, 2005
Messages
1,174
Location
Pa
Website
www.hereismylife.com
I was reading this post on wash and learning here.

http://www.totallyamaha.net/forums/s...ht=piston+wash

My question is. Pic 1 and 2 look about the same. I am worried about the very outer edge. What does it mean if you only see aluminum whole way around piston about 1/4 inch from outer edge in. Also did not really see pick marks or wash at all. Looks like it should go between pic 1 and 2.

Also how can you tell if you have enough of oil by looking at piston top?

Thanks Joe
 

joe pretty simple. when the top of your piston looks shinny and new, your machine is too rich. when the top of your piston has carbon in center and filters out to coffee brown at edge thats good safe jetting or burn. if your piston top is white/ grey thats showing a lean condition. pretty much three reading. 3:16 (yammie tony)
 
hereismylife said:
I was reading this post on wash and learning here.

http://www.totallyamaha.net/forums/s...ht=piston+wash

My question is. Pic 1 and 2 look about the same. I am worried about the very outer edge. What does it mean if you only see aluminum whole way around piston about 1/4 inch from outer edge in. Also did not really see pick marks or wash at all. Looks like it should go between pic 1 and 2.

Also how can you tell if you have enough of oil by looking at piston top?

Thanks Joe
Click to expand...

You say pic 1 and 2 look about the same. The pattern so to speak maybe similar but the pics are very different. Pic 1 shows a dark brown center with shiney newish look all the way around. Pic 2 has the similar center shape but is a chalky/ashey grey as well as the outer edge has the chalky/ashey look, especially the horse shoe shape around the front of piston show detonation. The chalky/ashey look is BAD.....anywhere in combustion chamber.

Something else you may not have noticed, Pic 2 is upside down compared to number 1 and 3. Wash marks should be found on carb side of piston and lean detonation starts showing up on exhaust side.
 
Last edited:
Devilin AblueDress! said:
You say pic 1 and 2 look about the same. The pattern so to speak maybe similar but the pics are very different. Pic 1 shows a dark brown center with shiney newish look all the way around. Pic 2 has the similar center shape but is a chalky/ashey grey as well as the outer edge has the chalky/ashey look, especially the horse shoe shape around the front of piston show detonation. The chalky/ashey look is BAD.....anywhere in combustion chamber.

Something else you may not have noticed, Pic 2 is upside down compared to number 1 and 3. Wash marks should be found on carb side of piston and lean detonation starts showing up on exhaust side.
Click to expand...

Thank you for the info. It does help. I am looking at all my sleds looking at the difference. What is the black from oil or gas?
 
Both, typically when using rich/lean its in reference to fuel. Which is both, color will change based on oil used, from a black to chocolate brown/tan.
 
Devilin AblueDress! said:
Both, typically when using rich/lean its in reference to fuel. Which is both, color will change based on oil used, from a black to chocolate brown/tan.
Click to expand...

We only run Amsoil. so with no oil it will not have any black or carbon. it will look like new. so lets say you run lean on oil and rich on fuel? What will it look like?
 
You must log in or register to reply here.


Back
Top