50:1
What would cause this?
- Thread starter blsnelling
- Start date
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50:1
I'm super impressed with the WoodlandPro oil here. I've sold some of it to the tree service guys I'm doing work for. I've considered using it myself. Now I'm really intrigued.
I'd say between 40:1 and 50:1. Absolutely nothing over 50:1.
Dan - I apologize for answering for you, but I'm jut trying to help you out since you aren't here right now. Any wrong answers and PLEASE correct them!
BTW, I want to say it was a pleasure meeting Dan today. He's another super nice guy to have amongst us.
I don't run anything that isn't R50.
So Brad, should I wonder about this being a problem with the 79er??
So Brad, should I wonder about this being a problem with the 79er??
Saw Dr.
Junk Collector
If the saw was running right, why is it apart?
Yeah I'll have to say that Dan is one cool cat. He's a great neighbor too.
Dan be the man.
Metals406
Granfodder Runningsaw
For porting I'd imagine. . .
Not as long as you're not running it too lean. I would never mill with 50:1 either. I'd say 40:1 would be a minimum, and would probably go 32:1 myself. I'm running 32:1 with R50 already, but am not saying that's necessary. I recommend 40:1 in any modded saw, just for extra insurance. I always advise a fully synthetic oil.
Yes.
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Metals406
Granfodder Runningsaw
I switched to 40:1 this fall, and I ain't looking back.
If I was goign to mill, I would run 40:1 or 32:1, richen it up a bit, get a foam filter and keep it clean and oiled.
From the dealer saw's aren't ready to mill...
You did say the limiters were still stock? That tells a lot of the story.
almost 30 viewing! You know how to reel em in Brad!
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rbmopar
ArboristSite Operative
It could be from heat, I don't know. What I do know, is that is exactly what a piston looks like when it has been run on old crappy varnished gas. Good oil in bad gas won't make it varnish the piston any less.
sefh3
Addicted to ArboristSite
What would cause that much carbon build up? I understand the saw is running hotter than it should so the carbon shouldn't build up, right?
neutral4x4
ArboristSite Operative
That piston had a combination of 3 things wrong with it.
1) The large burned mark on the underside of the piston shows that the saw was running too hot (Check your spark plug, it might be the wrong one).
2) The saw isn't broken in. If the rings still have the lines on them from when they were made, they aren't broken in. The cylinder doesn't have hone marks, so the rings never wore into the bore. Have the rings been replaced before? It sounds like they have been and nobody de-glazed the cylinder wall.
3) I'm not positive that it was your problem, but bad gas will leave dark marks like that. Bad gas however, is NOT a reason for the whole piston to be covered in carbon, just a reason to have an excess of carbon near the combustion chamber.
1) The large burned mark on the underside of the piston shows that the saw was running too hot (Check your spark plug, it might be the wrong one).
2) The saw isn't broken in. If the rings still have the lines on them from when they were made, they aren't broken in. The cylinder doesn't have hone marks, so the rings never wore into the bore. Have the rings been replaced before? It sounds like they have been and nobody de-glazed the cylinder wall.
3) I'm not positive that it was your problem, but bad gas will leave dark marks like that. Bad gas however, is NOT a reason for the whole piston to be covered in carbon, just a reason to have an excess of carbon near the combustion chamber.
I don't think this saw's ever been apart before.
What is this guy storing his gas in? Is he buying his gas at a mini-mart?
Dan, aka "the westspartan", is at his families home in KY for the holidays. Hopefully he can pop on here and give us some more info.
As far as I know it hasn't.
He bought the saw brand new in (September??) of 2008. He's been running it for nearly a year and a half.
