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  #1  
Old 06-04-2011, 09:04 PM
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Default Stihl chainsaw runs like crap

someone is paying me 10 bucks if i can figure out whats wrong

the spring in the recoil was broke, sort of fixed that, and got it to run, but it runs terrible........

here is the video first with exhaust on, next one without an exhaust. it has a reed-induction so that i dont need backpressure to run it (is this correct?) the only port on the cylinder is the exhaust.

carbeurator looks clean as can be, fuel lines OK, piston looks brand new, rings great, cylinder nice and smooth, spark plug sparking HOT, brand new gas...

so maybe its an exhaust blockage?



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Old 06-04-2011, 09:08 PM
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have u tryied simple ****

clean carb

check for air leaks
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Old 06-04-2011, 09:12 PM
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yeah, well by running like crap, i mean it wont even throttle up.....

seems to rev up alot higher with no exhaust.

carb is really clean like i said, i cant make it any cleaner... needle moves freely.


also tried tuning it a bunch of times. WOT and turning it in a little at a time, but it never even reached like 3000 RPM
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Old 06-04-2011, 09:21 PM
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getting plenty of fuel to the carb?

what is the compression like

u say it runs better with no exhuast
it isnt rusted out and colapsed inside has it
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Old 06-04-2011, 09:29 PM
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how olds the fuel?
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Old 06-04-2011, 09:33 PM
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not sure about the compression as for a PSI but it seems normal or even more... its hard to turn over......

and B-man, read the first post lol.


it has no fuel primer... i think thats odd, but when it runs i can see fuel moving in through the lines and also see some of it spraying up out..... muffler looks brand new from the outside.

also it makes ALOT of white smoke sometimes. oh and it backfired and caught on fire too.
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Old 06-04-2011, 09:45 PM
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oh i just re read the first post and realized i have asked only question of with are answered in the first post

my bad

the muffler hasnt just been repainted

i dont know how to check or exhaust blocks
but get a clean rag and wrap it around the muffler then blow though it

it u shake it is there any rattleing

wheres russ gone
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  #8  
Old 06-04-2011, 09:46 PM
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is it two stroke. make sure you have oil mixed with gas. LOL i hope you know this already
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Old 06-04-2011, 09:48 PM
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blue is one of the most knowlegeable people on this site
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  #10  
Old 06-04-2011, 09:50 PM
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Quote:
Originally Posted by fowler View Post
oh i just re read the first post and realized i have asked only question of with are answered in the first post

my bad

the muffler hasnt just been repainted

i dont know how to check or exhaust blocks
but get a clean rag and wrap it around the muffler then blow though it

it u shake it is there any rattleing

wheres russ gone
no rattling, its deffinately not repainted, ill blow through it without a rag, haha!



Quote:
Originally Posted by gokart14 View Post
is it two stroke. make sure you have oil mixed with gas. LOL i hope you know this already
its unleaded with 40:1 poulan oil..... yeah probably oil but shouldnt really affect it....


when i got it was sucked dry.... also i dont think he ever put in bar and chain oil

one thing i am impressed with is usually chainsaws have plastic bodies, this one is aluminum!!!!
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Old 06-04-2011, 09:50 PM
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ya thats what i was thuinken just wanted to make sure lOL
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Old 06-04-2011, 09:55 PM
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Id say the timing is out, or the cdi is shot.

Check your Ignition system, air gap, flywheel key.

Hope you get it running, and charge at least 20 for your time
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  #13  
Old 06-04-2011, 10:05 PM
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Quote:
Originally Posted by Cam View Post
Id say the timing is out, or the cdi is shot.

Check your Ignition system, air gap, flywheel key.

Hope you get it running, and charge at least 20 for your time
cool! well there is this weird chip thing attached next to the coil.... wonder what it does?
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Old 06-04-2011, 10:07 PM
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I would check the adjustments on the side of the carb. Normally there is 2 screws (Sometimes only the one.) for High revs and one for Low down revs, it will normally state where to start. One is normally 3/4's of a turn out and the other is 1 full turn. As the machines get older these figures normally change.

Taking the muffler off made a significant difference, yes? Would likely indicate a blocked muffler. If you can heat it up and then tap it with a hammer. This will loosen all the carbon build up. Then it should just fall out the holes.

Thats where I would start.

Jeremy.
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Old 06-04-2011, 10:10 PM
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Quote:
cool! well there is this weird chip thing attached next to the coil.... wonder what it does?
Depends, what flavour is it?
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Old 06-04-2011, 10:11 PM
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heres how i fixed the recoil. bent a new hook......



wound it up



pressed it in



TA-DA! (greased it right after)



also he gave me a old fire siren, its LOUD.



yup, hes the same guy i got the tractor from. dont give me ideas lol...

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Old 06-04-2011, 10:12 PM
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Quote:
Originally Posted by Rustydog2010 View Post
I would check the adjustments on the side of the carb. Normally there is 2 screws (Sometimes only the one.) for High revs and one for Low down revs, it will normally state where to start. One is normally 3/4's of a turn out and the other is 1 full turn. As the machines get older these figures normally change.

Taking the muffler off made a significant difference, yes? Would likely indicate a blocked muffler. If you can heat it up and then tap it with a hammer. This will loosen all the carbon build up. Then it should just fall out the holes.

Thats where I would start.

Jeremy.
good idea!!! will do that. i had no idea how to clean it....

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Depends, what flavour is it?
probably wood chip
  #18  
Old 06-04-2011, 10:18 PM
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Quote:
probably wood chip
Haha kettle's wood- fried

Id start with the simple stuff as well, is the carb clean?
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Old 06-04-2011, 10:34 PM
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Make sure the chain is rolling nicely with little resistance.
  #20  
Old 06-04-2011, 10:43 PM
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Quote:
Originally Posted by Cam View Post
Haha kettle's wood- fried

Id start with the simple stuff as well, is the carb clean?
roasted too since it had a backfire and blew flames out....lol

sure is.

Quote:
Originally Posted by HellSpawn View Post
Make sure the chain is rolling nicely with little resistance.
when i got it was terrible, now that i put bar and chain oil in it its working much better.... no more tight links....

still doesnt rev up with no load.
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