Author Topic: 026  (Read 441 times)

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Offline jarbabe

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026
« on: November 15, 2012, 07:29:50 pm »
Hi all, new to this site.  I have an older model 026 that has cut many cords, I have always taken great care of it.
I haven't used it in a few years and this summer I dusted it off, and couldn't start it.  I found a rotted gas line and changed it and the filter, cleaned then rebuilt the carb and changed the air filter and plug.  It starts with ease now, idles fine , has good top rpm but when I put it to wood it has no b@lls,  I have to kind of pump the throttle and it will cut but no where near it's old self,  I pulled the muffler and the piston / sleeve looked fine.  I'm in Long island N.Y. and there are tons and tons of trees down and I could be helping a bunch of folks in my area if I could just get this thing running strong again. any suggestions ? Jim

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Offline Old Iron Logging

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Re: 026
« Reply #1 on: November 15, 2012, 07:51:18 pm »
Check the impulse line for rot.

Offline jarbabe

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Re: 026
« Reply #2 on: November 15, 2012, 08:45:53 pm »
I replaced the in the tank fuel line and filter and I think I replaced the impulse line too.  I just checked and the line looks new, but there is about a full 1/2 inch of carb nipple showing before going into the line,  is that nipple that long ???  I seem to remember a coworker telling me to check crank case pressure to check seals ??

Offline Al Smith

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Re: 026
« Reply #3 on: November 15, 2012, 09:24:34 pm »
It's entirely possible the seals might have gone bad .Usually the clutch side goes first which is not too hard to change .Try opening the high speed jet about a half turn first and see if that might help .Fact give both screws a little more open .

Sometimes after they sat a long time the passage ways get a little plugged .If you run them rich often they clean themslves out .Once it starts running extremely rich just lean it back down .

Offline jarbabe

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Re: 026
« Reply #4 on: November 15, 2012, 09:43:41 pm »
I just watched a video on changing the seals and it showed a vaccum pump attached to the impulse line holding vacum when they are good.  I think I will try that tommorrow,  it should tell me if the impulse line and seals are good.

Offline Al Smith

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Re: 026
« Reply #5 on: November 16, 2012, 06:32:34 am »
That's one method but you can pretty much tell by running it .Typically unless the seal is real far gone they start out okay but the longer you run it the worse they get .You keep richening up the high speed to keep it running .Once you shut it down and it cools off on a restart if puffs like the choke is set .

Another method you can use on the clutch side is to spin off the clutch so you can get to the seal .Fire the saw up at idle and either use the propane from a torch or a tiny shot of starter fluid shot at the seal .Tiny now not like drowning a frog .If the seal is leaking the R's will climb on the engine .

Offline jarbabe

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Re: 026
« Reply #6 on: November 20, 2012, 09:07:29 pm »
Thanks for all the advice !   I did a vacuum test by sealing up the exaust port with gasket material and corking the carb boot.  I then put a hose over the impulse line and it held pressure and held a vacuum while turning it over.  The seals along with the impulse line, carb  boot and gaskets were all fine.   The culprit was the gas,  I used regular 87 octane NG...... I went to to hess and got the highest octane I could and WAHAM'O It ran like the first year I had it...............Thanks again all,  My saw and I were out helping the neighbors  clean up after sandy.

Offline Al Smith

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Re: 026
« Reply #7 on: November 22, 2012, 03:39:48 pm »
You just had some funky gas because it should have putted on 87octane .

If it's in the path of that storm they might have just sent in some old funky stuff to be rid of it and probabley that saw is not the only thing that didn't run right .