CS-8000 wrong mixture Help ?

[ecodao]

Hi there folks ,

 

had problems with log in so have only now been able to post ,

 

Recently acquired a Echo CS-8000 saw from a good friend, it had been running sweet until the wrong mixture fuel was added and it was run for a short while.

 

it ran on pure petrol only for a short while but now it wont run , on removal of the exhaust i found that the piston was slightly `streaked` due to lack of lubrication, and therefore now resulting in little or no compression.

 

does anyone have any tips on what i should be replacing with new parts ?? new rings ? piston ?

 

i am sure that a few folks on here must have made this mistake with fuel themselves and have then fixed their saws.

 

many thanks

 

Steve

[littlerob]

think by the sounds of it new piston kit is what you need mite need the pot to

[ecodao]

Thanks Rob,

 

I was hoping that it would not be so drastic... :-(

 

steve

[spudulike]

Go to my "Whats on your bench today" thread, lots of good advice on there - if the piston isn't bad, you will need to remove the cylinder, clean of the aluminium transfer and probably fit a new piston.

 

Don't run a new piston without removing the aluminium transfer

[swinny]

you'll have to take it apart to access the damage, look on ebay for parts

[ecodao]

Thank-you for the responses, i will check out that thread.

i only really know Stihls , so this saw is a challenge,

 

i have found some good cheap parts on the web , so i am hoping i can get it up and running cheaply.

 

Just to add : it never seized, it just lost power then wouldn't start,

 

steve

[spudulike]

Thank-you for the responses, i will check out that thread.

i only really know Stihls , so this saw is a challenge,

 

i have found some good cheap parts on the web , so i am hoping i can get it up and running cheaply.

 

Just to add : it never seized, it just lost power then wouldn't start,

 

steve

 

The loss of power is the aluminium on the front of the piston becoming molten through overheating and stopping the ring from making good contact with the cylinder by holding it in.

 

The saw doesnt need to seize solid, just get hot enough for the piston to melt - it is all the same:thumbdown:

[ecodao]

The loss of power is the aluminium on the front of the piston becoming molten through overheating and stopping the ring from making good contact with the cylinder by holding it in.

 

The saw doesnt need to seize solid, just get hot enough for the piston to melt - it is all the same:thumbdown:

 

Thanks for the info , just reading your thread now.... amazing thread, well done its certainly educating !

 

thanks

 

steve

Edited December 6, 2011 by ecodao
sp

[Cut4fun]

You can do as spud says. But I also found after cleaning up ring grooves and a set of new rings and cleaning up a slightly scored piston you can put it back to work for the cost of rings. Many of them out there with years of cutting on them that way now I have did in the past on the cheap for people.

 

Also the 8000 has a new updated cylinder with quad transfers closed port and piston with domed piston. Lot more psi stock.

There is a thread about it with new oem part numbers for the new topend on chainsawrepair with pics.

 

My JD 800 yellow colored 8000

 

Edited December 6, 2011 by Cut4fun

[GardenKit]

You must be a very skilled or a very lucky man (or both). If I were to carry out a cheap repair like that, I bet it would be back in within a few days even more damaged than before.

I would then be expected to pick up the whole cost of a proper repair.

Still, I suppose if you are doing it yourself, for yourself, its worth a try.