ms260 not pulling fuel through

[spudulike]

... managed to take a look in better light today and the piston is pretty badly damaged upto the ring on the exhaust side and there are some vertical marks. The back is clean, smooth and shiny metal grey.

 

The inside of the cylinder looks undamaged to the untrained eye.

 

I'm trying to find the camera cable to stick some pics on but do the descriptions point to a possible cause?

 

The fuel that I took out smelled pretty stale and very red - i'm thnking he had his mix pretty wrong...

 

The vertical lines are signs of seizure, this generally leaves a residue of aluminium on the bore of the cylinder just above and below the exhaust port -this MUST be removed if it is present.

 

Get us some photos of the exhaust port and the piston - if the bore is clean, it is possible the damage has been caused by carbon falling in to the cylinder from the exhaust port.

 

Has anyone tried to lock the piston in place by inserting something like a screwdriver in to the exhaust port:001_rolleyes:

[Old WoodChip]

:blush:There is an old saying, never lend your tools because no-one looks after them like you do!

[GardenKit]

:blush:There is an old saying, never lend your tools because no-one looks after them like you do!

I get a lot of saws in, usually from the domestic market, that dont go after they have been lent to friends. They are usually siezed due to running on neat petrol.

People will lend these things without checking that the friend knows how to use it and what fuels, oils etc to use.

I also get a lot of people in saying " I borrowed this and now it doesnt go, can you just fix it before I return it?.....

These are normally domestic saws which of course are not economic to repair.

Old saying "never a lender or a borrower be",.... very true.

[Andrew Cork]

cheers spud, I'll try and get the camera sorted for some pics this weekend.

 

The only significant work that's been carried out on the saw is a new coil a year or so ago, so no one's had any reason to jam the piston. It's spent quite a bit of time of the shelf the last few years but occasionally it is "just the right tool" so it'd be handy to get it running again.

 

Hindsight is a wonderful thing, but it was just an old mate that wanted to borrow and old saw to cut a few logs, told me he had 2 stroke that he used for his hedge cutter. Guess I'm just too nice...

[spudulike]

Sometimes doing the job for someone is the easier option - got to think about PPE and the friends abillity as well as their mechanical knowledge!

[Andrew Cork]

thanks guys, just for the record he had just moved back from the states where he used a domestic saw for logs etc and the saw was lent with full ppe and a quick re-cap of safe saw use.

 

reckon i'll get the cylinder cleaned up and inspect for damage, if it looks clean It's got to be worth getting hold of a 3rd party piston and see what happens... Failing that I reckon it's heading under the bench to the spares pile.

[spudulike]

thanks guys, just for the record he had just moved back from the states where he used a domestic saw for logs etc and the saw was lent with full ppe and a quick re-cap of safe saw use.

 

reckon i'll get the cylinder cleaned up and inspect for damage, if it looks clean It's got to be worth getting hold of a 3rd party piston and see what happens... Failing that I reckon it's heading under the bench to the spares pile.

 

Good lad - there are many that wouldn't have shown your diligence - sorry if I offended, didn't mean to!

 

If you need the cylinder cleaned - PM me, I have a high rate of success:thumbup:

[Andrew Cork]

hi spud, just a quick update...

 

Finally got round to giving everything a good clean and sticking in a new piston. I've had it out on a few jobs this week and it seems to be running in nicely so fingers crossed I'll get a

bit more use out of the old thing yet!

 

Thanks for the advice, the cylinder didn't appear to have any scoring but there was a tiny (<1mm) chip on the bottom edge of the exhaust outlet??

 

No offence was taken and sorry if I sounded a bit arsey, just didn't need to here any more advice on the marvels of hindsight!

 

Thanks again, Andrew.

[Stereo]

I lent a brand new 345 to a 'tree surgeon' once. Found out later he had been mixing fuel in the saw itself.

 

Never again.

[Daniël Bos]

Had it the other way around recently. One of my saws broke so I borrowed an ms180 from my neighbour who is a sheep farmer. Took it to work without looking at it first.

 

It had one of those oregon chains with the added bumper plates, horrible chain and horribly blunt.

The airfilter was dirtier than my doormat (foam/fibre pad filter) it was also not in properly, leaking air past it.

The fuel was nice and brown-ish.

The sealing ring on the fuel-cap was split so it dribbled fuel.

There was only one bar nut.

 

I sorted through the thing, put a new filter, nut and chain on, and gave it a quick clean before I took it back, he hardly believed it was the same saw. :biggrin:Now I have a neighbour who is happy to lend me his stuff when needed and has a saw worth borrowing.