Chashowlett
ArboristSite Operative
Here is a better picture . The only opening to the crankcase is the impulse hole. And here is a picture of the piston at the top of the stroke, skirt is covering the intake completely.
Cooked Crank
- Thread starter Chashowlett
- Start date
Help Support Arborist Forum:
- Joined
- Dec 4, 2016
- Messages
- 1,815
- Reaction score
- 2,780
Are you trying to tell us that the hole the piston goes into isn't open to the crankcase???
Chashowlett
ArboristSite Operative
Ok, the gasket does look right
Chashowlett
ArboristSite Operative
I never said that, I said that it's not oiling the basement
cus_deluxe
Commie Satan turd
The oil is in the gas bro. And that saw could not possibly run if thats the position of the piston at tdc.
cus_deluxe
Commie Satan turd
Just put two spark plugs in it lol.
rayjay257
ArboristSite Operative
The second one down in the crankcase.
Chashowlett
ArboristSite Operative
Actually it was brought to me by a customer and handed me at carb kit and said all this just needs a carb kit. Of course I checked the compression first. So I can't say that I have seen it run ,. And don't you just love it when they diagnose it for you
astnmacgto
Carnac The Magnificent
I'm confused at your confusion.
Bro, seriously though go back through this thread very carefully and read what you have been told, then apply it to the saw, then please oh please only respond with an apology for those who were trying to help you.
A lot of smart guys in this thread. I promise none of them are magically wrong but all have the same exact story about how it works.
Bro, seriously though go back through this thread very carefully and read what you have been told, then apply it to the saw, then please oh please only respond with an apology for those who were trying to help you.
A lot of smart guys in this thread. I promise none of them are magically wrong but all have the same exact story about how it works.
Someone lets you work on their saws? And you nothing about two strokes? And you use expensive gas pre-mixed from a can?
Question: Besides working on a customers saws, someone trusts you using their tools too?
On second thought, I've got this green Wild Thingy I found in the metal pile at the landfill, I think it needs a carb kit...........
Jimmy in NC
Addicted to ArboristSite
Were there open port and closed port TS350/08S saws like Husky 55s, 365s, 268s, etc?
I bet the same bottom end and gasket was used for multiple jugs... I think the bottom feed for an open port jug in the cases is what is throwing the OP.
I bet the same bottom end and gasket was used for multiple jugs... I think the bottom feed for an open port jug in the cases is what is throwing the OP.
That's a very well matched expansion chamber!!! Completely blows back all the blow-by charge from the resonance before it fires.
Do a search on piston ported two-stroke engines.
BTW, there are also reed-valve and rotary valve. But they all get the oil mixed with the fuel to the crank, before it goes to the combustion chamber.
P.S. Here is a tip before you pick up a wrench next time, clean it up first.
It looks like someone has put the wrong piston in it. The only intake charge is coming in on the sides of the piston which would restrict the flow a lot. I think a windowed piston would work much better.
It may very well have the wrong piston. The intake should be open with piston sitting against the head.
Picture posted above piston is not close to TDC. Bore is 49mm stroke is 34mm. So the bottom of the skirt should be up a little higher than 70% bore diameter from bottom of bore. Maybe piston is hung up on a chunk of bearing material?
Some closed port pistons have windows around the pin to help feed the lower transfers, some like the TS400 just have big cutouts on the sides of the piston below the rings.
I hope this thread provides some more entertainment when I get up in the morning.......
I was thinking it was hung up as well. I prefer non windowed pistons personally, side feed transfers or not, as long as the bridge has clearance.
Definitely an odd thread, but good for a laugh or two at least.
Little Al
Addicted to ArboristSite
If as you say there is no way the fuel charge can enter the crankcase my question is How did the motor run to "cook" the big end? no mix in the cranckcase =no go, i would guess a straight gassing at some point & may be the cyl was changed without the bottom end being fixed. Could I add that the way you come across in some of your posts you are less likely to receive help if that is what you are requiring or do you know & are trying to catch other posters out
I'm not sure helping you with such a bad know-it-all 2stoke trophy winning attitude is a good idea at all. It will encourage you to work on other 'paying customers' saws which I don't think we should support at all. If you wonder why small engine techs are tarnished with a black eye, perhaps a mirror is what you really need. Your frustrated because you don't know what your doing. People round here are nicer with more patience than me to keep offering you help with such attitude.
