What's on your bench?

[Partner]

the biggest stihl?

 

[Mack 880]

the biggest stihl?

Yes sir.

 

[Sierra_rider]

Not really "on the bench," but it was my shop project today...added a couple of canless LED lights above the lathe and mill. I like the results:

At night:

 

[Kiwioilboiler]

Not a bench of any sort. Gave my push mower a 200/50 hr service.

 

[Sawyer94]

any ideas what caused this?

 

[jacob j.]

Not really "on the bench," but it was my shop project today...added a couple of canless LED lights above the lathe and mill. I like the results:

At night:

That's a nice set up...

any ideas what caused this?

There was a lot of heat on that piston. I'm thinking straight gas or a serious air leak. What does the intake side look like?

 

[Ketchup]

any ideas what caused this?

My guess is bad gas. Air leak is definitely a strong contender.

 

[nbbt]

My checklist would start with, check timing, is gas good and IMO ethanol free, proper heat range plug from reputable manufacturer. Was the saw/ dirty fins getting proper air flow to cool. And then air leaks.

 

[Mack 880]

Maybe pre-igniton? It looks peppered on the top?

 

[farminkarman]

My guess is bad gas. Air leak is definitely a strong contender.

I would also place a heavy bet on bad fuel...it is amazing how quick bad gas can burn down a 2-stroke

 

[Gullet]

I generally use PIG mat when working on/splitting a saw. This one had an unseen hole punched through the case from some jagoff using a long screw in the front handle. (I should have checked not the first time I've found this on a eBay saw) Not a big deal I can repair it easy enough...

Working on a axe handle & close to staining it & BLO.
Messy stuff.
I've done A LOT of gun Blueing & mixing Cerakote/Duracoat & it's just excellent for messy liquid stuff (lotso saw work also).
Just clean it off (or drain it lol), set it on a wall & you have your wood bench back.
Had to cover my stereo cause of the dust (sanding).

 

[Matt Ellerbee]

I would also place a heavy bet on bad fuel...it is amazing how quick bad gas can burn down a 2-stroke

I was thinking water in fuel. Doesn’t it crater piston tops like that?

 

[farminkarman]

I was thinking water in fuel. Doesn’t it crater piston tops like that?

when I have had water in the fuel, I can’t get the engine to run

 

[Ketchup]

I was thinking water in fuel. Doesn’t it crater piston tops like that?

That’s exactly what I was thinking. Good fuel will separate from the water but rotting ethanol will hold a lot more in suspension. At that point it’s not really gasoline anymore. It’s a bunch of different chemicals. Some react with the aluminum. The piston swells and little bits tear off. Smearo destructo, adios bearings.

Pre-ignition/detonation looks slightly different. The whole crown is deeply jagged and cratered. Top of the chamber looks hammered to death as well.

 

[Gullet]

when I have had water in the fuel, I can’t get the engine to run

Always heard water in mix will kill the carb first.

 

[Gullet]

I rebuilt a couple of 272s one with a meteor piston kit one with a hyway popup kit
New carb kits,seals fuel lines etc.View attachment 365220View attachment 365221View attachment 365222View attachment 365223View attachment 365224
The meteor saw turned out great
Started and tuned easy
I cut with it all day
The hyway saws coil took a *s-word
I need to replace it before I cut with it.

Prolly my favorite saw, Meteor piston also...

 

[Maintenance Chief]

Trying to help an old duffer out at work get his saw running.


Yeah! Went for 6 cuts and the flywheel side bearing locked.....
Now I'm going deep into it.
Fortunately I got a hankering for these now so called a friend who I've dealt with in the past and am probably going to pick up a few for myself.

 

[Canadian farm boy]

Ms462 Arctic. These saws have been out for like 4 years now roughly and I finally have one on the bench for some love.

 

[bulletpruf]

On the bench today - 7.3 International diesel cylinder heads - valve guides reamed out, honed, fresh 3 angle on the seats with some Neway cutters.

 

[huskihl]

Pre-ignition/detonation looks slightly different. The whole crown is deeply jagged and cratered.

If you used the same gradually worsening fuel every couple days or so, then after a few days or weeks, yes. But put a saw away with fuel in it and then use it a year or 2? 3? years later with that old fuel and it’ll eat the top off the exhaust side of the piston within a few minutes of hard run time.