Author Topic: Cylinder scoring, sanding, 254SE  (Read 546 times)

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Offline KilliansRedLeo

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Re: Cylinder scoring, sanding, 254SE
« Reply #20 on: March 01, 2014, 09:04:33 am »
Gregg, you can use air on fuel lines but, given the age of the saw it is probably better to just replace them. Most often they go to chit right where they exit the fuel tank. Everything that Nikko suggested checking is also a very good idea to do on all saws no matter if you suspect a problem or not. The 254 is one of Nikko's favorite saws, so on this particular model of Husqvarna (or any other for that matter) he would not steer you wrong.

So after the firewood posse, are you fellows headed off for a pub crawl?
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

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Offline SawTroll

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Re: Cylinder scoring, sanding, 254SE
« Reply #21 on: March 01, 2014, 11:20:11 am »
......

So after the firewood posse, are you fellows headed off for a pub crawl?

Of course they are, but hopefully not before they do the cutting.....  :-\

Yes Gregg, I know very well what "chaps" means in OZ, and I suspect most others do as well.  ;D

Online 3000 FPS

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Re: Cylinder scoring, sanding, 254SE
« Reply #22 on: March 01, 2014, 11:47:13 am »
Well here in Wyoming chaps is what we wear while riding our horses.     ;D ;D

But if I recall correctly I saw a movie once where one guy called another,   Hey ole chap.
PP 505, 475, 445.

Offline Gregg MacPherson

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Re: Cylinder scoring, sanding, 254SE
« Reply #23 on: March 01, 2014, 04:22:47 pm »
Pub crawl?  Nah,  we'll probably settle down for a quiet meditation,   then some nice vegetarian food.   Two saws will be cutting for five fires.  It'll take two or three days before it's all extracted, cut,  split and shifted.  The 154 will get a lot more work than it normally would. 

OZ vs New Zealand.  That's a bit like mistaking Canadians vs Americans.   It's always been a joke down here that Americans think NZ is attached to Australia.  There is a friendly but fierce rivalry between Kiwis and Aussis.  The word "Chap" in NZ is sometimes used straight,  but often with some mild humour,  a comment on Englishness.

Back to saws.   
I did look in the 254 exhaust port first.  Seeing the scratches on the piston,  I went ahead a pulled the cylinder.  I hadn't heard or thought of pressure testing for leaks at that stage.   On that point,  what's the easiest way to set up that pressure test?  The input and the plugs.

How does one assess the bearings without splitting the crank case?  The gudgen pin rollers I haven't got super clean yet for a look,  but my finger nail may feel some pits.  The big end bearings I can see the ends of the rollers and they are rolling in their cages OK and look clean.  I don't know if this usefully tells anything about big end wear,  but the side to side play at the top of the con rod is about 1.5mm.

Cheers,
Gregg.

Offline KilliansRedLeo

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Re: Cylinder scoring, sanding, 254SE
« Reply #24 on: March 01, 2014, 05:36:45 pm »
OK, the easiest way to block off the engine for pressure testing is a bicycle inner tube. You cut two strips off the tube just wide enough to fit between the exhaust and intake bolts. You then tighten up the bolts just enough to compress the rubber and create a seal. You can buy or make from an old spark plug something to seal off the cylinder and leave a nipple for the pump hose. You get a pump connect it to a hose connect the hose to a pressure meter and then run a piece of rubber tubing from the meter to your spark plug device. Pump 80kPa into the motor, if at the end of 30 seconds the pressure is above 60kPa you are good to go!
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
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Offline Gregg MacPherson

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Re: Cylinder scoring, sanding, 254SE
« Reply #25 on: March 01, 2014, 05:54:45 pm »
OK, the easiest way to block off the engine for pressure testing is a bicycle inner tube........

Ta mate (translates as "thanks man")

Offline KilliansRedLeo

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Re: Cylinder scoring, sanding, 254SE
« Reply #26 on: March 01, 2014, 06:23:26 pm »
Nada, translates to 'it was nothing' in Portuguese.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline Gregg MacPherson

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Re: Cylinder scoring, sanding, 254SE
« Reply #27 on: March 01, 2014, 06:38:29 pm »
Nada, translates to 'it was nothing' in Portuguese.

Try this one...
http://www.translatebritish.com/index.php

Means the same in NZ slang.

Offline Gregg MacPherson

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Re: Cylinder scoring, sanding, 254SE
« Reply #28 on: March 01, 2014, 11:25:03 pm »
On the issue of how this happened to the saw.  I was randomly looking around the forum and found thois by KRL.."..If there is no mix oil left in the can after the gas evaporates off then chances are that the saw was fed improper fuel..".  I then realized that this was one thing I could have done.  Not to assume that the gas in the tank was the same gas as when it was damaged,  but if the gas was low on oil or without oil then that is a probable cause.

Without thinking through any such things,  on buying the saw I washed the gas tank and tried to start it with good fresh fuel.  I think I will never buy another saw without pulling the mufler first.   

Offline 660magnum

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Re: Cylinder scoring, sanding, 254SE
« Reply #29 on: March 01, 2014, 11:39:45 pm »
Axiom #1

"I will never buy another saw without pulling the muffler first."
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

 

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