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#Post#: 15560--------------------------------------------------
CS 40 Issues
DIR By: martyinmi
Date: January 19, 2013, 10:16 am
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My CS 40 has been acting up more and more lately. So much so
that I haven't been using it for fear of damaging it. When it is
cold, I prime it a few times and it starts right up, but it
idles real high(4-6000 rpm's) and runs lean. I have to piddle
around with it to get it to eventually idle properly, usually
turning the L screw out an eighth or so, and then it is fine
until I make a few cuts. At that point, it runs rich and will
not idle unless I turn the L screw back in where it was. If I
leave it set running for a few minutes to cool down, it will
eventually start to rev up and run lean again.
These little saws don't have an intake boot, and the pump gets
it's pulses from a small hole on the end of the carb that lines
up with another hole in the cylinder. I had the carb cleaned and
rebuilt, and that made no difference.
My thought process tells me that it is a crank seal, and I've
ordered one.
Anyone else have any other ideas before I tear into it?
#Post#: 15703--------------------------------------------------
Re: CS 40 Issues
DIR By: martyinmi
Date: January 22, 2013, 11:15 am
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Not even my favorite uncle Al_Smith has any advise? ???
I tracked my new seal. It should be here tomorrow.
I might need some help getting the clutch off, as I've never
messed with one of these things before, so I'm sure ya'll
haven't heard the last from me on this saw! ;D
#Post#: 15713--------------------------------------------------
Re: CS 40 Issues
DIR By: Cut4fun
Date: January 22, 2013, 2:53 pm
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I dont reply if I dont know squat about the saw. I looked it up
when you first posted thread. It was in green JD and Homelite
made. All I know.
#Post#: 15720--------------------------------------------------
Re: CS 40 Issues
DIR By: 660magnum
Date: January 22, 2013, 4:05 pm
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I looked up John Deere CS40 . . . .
This one looks more like it might be a EFCO? If it is a Homie,
it is older?
Then I looked up Homelite CS40 and only picture I saw was of
Mitch blowing one up on You Tube. It was red with a black top.
HTML http://www.youtube.com/watch?v=gA9dfGN-YJs
#Post#: 15723--------------------------------------------------
Re: CS 40 Issues
DIR By: martyinmi
Date: January 22, 2013, 5:02 pm
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I THINK the CS 40 is just a re badged 250, or maybe visa-versa.
??? ???
Thanks for the efforts!
#Post#: 15756--------------------------------------------------
Re: CS 40 Issues
DIR By: Al Smith
Date: January 23, 2013, 8:19 am
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Well nephew Marty you know more about them than do because I've
never even seen one .I would concure on the suspect of a
crankcase seal leak though as most likely the culprit .
You find most used saws on the cheap there is normally a reason
they got shelved .
A thought occured to me though .If that little rascal uses a
pressuzed oil tank it might be a fact that might have a leak too
but I know nothing about the saw so that's just a WAG on my part
.
Let me go through my Homelite IPL's and see if I have a break
down or if I even have a listing on that model .
#Post#: 15757--------------------------------------------------
Re: CS 40 Issues
DIR By: Al Smith
Date: January 23, 2013, 9:08 am
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It appears I have IPl's for chainsaws ,weed wackers ,a compactor
,a bunch of geardrives ,generaters ,cut off saws ,a water pump
with an X -12 engine and a bunch of stuff like a spot light of
all things .Nary even the mention of a CS 40 or a kitchen sink
for that matter .
#Post#: 15759--------------------------------------------------
Re: CS 40 Issues
DIR By: Al Smith
Date: January 23, 2013, 11:09 am
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Aha it has a crankshaft driven oil pump ,disregard my former
idea of an impulse pump
.
HTML http://s30387.gridserver.com/partsDiagrams/Homelite%20CS%2040%20and%20CS%2050.pdf
#Post#: 15788--------------------------------------------------
Re: CS 40 Issues
DIR By: martyinmi
Date: January 23, 2013, 10:08 pm
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Hey, thanks a bunch Al. My crank seal was supposed to be here
today, but it didn't show.
I got some experience replacing the intake boot on one of my
360's today. They sure are easy little buggers to work on.
I think that the best running one of the three 360's will out
run my muffler modded MS 310. In fact, I think it will quite
handily hand it it's own butt! ;)
I'll give ya'll my report on Saturday.
Thanks again everyone!
#Post#: 16245--------------------------------------------------
Re: CS 40 Issues **UPDATE**
DIR By: martyinmi
Date: February 3, 2013, 5:23 pm
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Well, I replaced the crank seal today. The old one looked like
new, and I shoulda just put it back in, but the new one was only
6 bucks shipping and all, so it's in there. I put a new piston
ring in it while I had it apart(11 bucks with shipping). It runs
about the same, maybe a touch more grunt. ???
I had our local Stihl dealer put a new kit in the carb a month
or so ago. He charged me 13 bucks, and the kit came from ebay
for 8 bucks. He also checked the compression for me and it was
140 psi. It feels a bit stronger now with the new ring.
I noticed today that after a few cuts it would idle rich, I'd
piddle with the throttle to keep it running until I found a
screwdriver, and all I'd have to do is just tap the "L" screw
and the idle would change. Can the needles in the carbs just
plain get worn out from too much adjustment? Or would that
signify some crap in the carb?
Of all my working saws, this one is my favorite one. It's light,
starts good, and cuts with an attitude like it thinks it's
bigger than it really is(it's 40.2cc's)! I've got close to a
hundred and fifty bucks into it now between the initial purchase
price, new bar and chain, plus the parts I've thrown at it.
Do I try to find a new carb for it, or just run it till it
blows? Or have someone with a sonic cleaner clean this one and
put it back together? Or maybe just admit defeat and mail it to
uncle Al and have him look at it...for a nominal fee, of
course!(I hear he works for beer ;D ;))
And... Is it common for these saws to NOT have a crankcase
gasket? In the parts breakdown they show one, but this one
didn't have one there. I just used a little bit of the
transmission sealant that Case/IH recommends when I put it back
together. :-\
Thanks for your patience gentlemen! :)
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