Cold saw won't start unless filter is taken off
- Thread starter rb_in_va
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begleytree
H. sapiens moderatus
All I can think of is the air filter is stopping the choke lever from closing off the choke fully, but I don't see how, really.
Possibly a cracked or unseated carburator boot. The filter is providing enough restriction that the majority of the intake is not being pulled from the carburator without the filter off.
Just a guess. But, it would fit the symptoms. I would check to see if the if the filter is restricting the choke butterfly first, then check out the boot.
Just a guess. But, it would fit the symptoms. I would check to see if the if the filter is restricting the choke butterfly first, then check out the boot.
gumneck said:Roger,
When we do that mill race, make sure your 066 is cold when you bring it over!!
Yeah, you'd win for sure then.
Dirttroll,
Wouldn't a cracked boot affect starting when it is warm too? It starts fine with the filter on when it's warm.
Al Smith
Addicted to ArboristSite
You know,these danged things have a mind of their own,sometimes.Maybe it doesn't like the non official Stihl part? That nonsense aside,I haven't a clue.Unless,perhaps the choke is not closing entirely.I've had this happen.Perhaps,if this is the case,the less restrictive filter allows more air,less enriched fuel.That,of course,was a rather wild stab in the dark.
That nonsense aside,I haven't a clue.Unless,perhaps the choke is not closing entirely.I've had this happen.Perhaps,if this is the case,the less restrictive filter allows more air,less enriched fuel.That,of course,was a rather wild stab in the dark.Just concerned that the aftermarket filter system may somehow be alterring something which is rendering the difficult cold starts. Perhaps it has absolutely nothing to do with it, but its an easy enough test to perform to ensure it is not the case.
Ax-man
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Just my opinion here, but a 66 has always been just a plain cold blooded saw to get started, it is one of the worst when it comes to starting one of Sthil's modern day saws, in talking to some of the local tree services and one logger all say the same thing. It also seems to be prone to flooding. Another trick I have had luck with is to set the choke between open (run)and the factory setting of a half choke, there is no setting there it is something you have to feel for to get it work and start.
I haven't done any changes to our 66 since the day one, it is still a stock saw, that is going to change one of these years. I have gotten better results starting by turning the low speed screw all the way in, with the limiter caps on the carb I'm sure it is pushed to the limit for a lean running condition, it hasn't blown up yet and has been set this way for over a year, if it does go over the edge it will give me a good excuse to rebuild it.
Sthil 066 also seems to be touchy to start becuse of a dirty air filter compared to other saws. I have to keep after this one more so than other saws.
Other than these little Mickey Mouse problems, a 66 is a good running, cutting saw after it gets warmed up, you can't go to step two without going through step one.
Larry
I haven't done any changes to our 66 since the day one, it is still a stock saw, that is going to change one of these years. I have gotten better results starting by turning the low speed screw all the way in, with the limiter caps on the carb I'm sure it is pushed to the limit for a lean running condition, it hasn't blown up yet and has been set this way for over a year, if it does go over the edge it will give me a good excuse to rebuild it.
Sthil 066 also seems to be touchy to start becuse of a dirty air filter compared to other saws. I have to keep after this one more so than other saws.
Other than these little Mickey Mouse problems, a 66 is a good running, cutting saw after it gets warmed up, you can't go to step two without going through step one.
Larry
JimL
Addicted to ArboristSite
Ax-man said:
my old one starts in 2 pulls if i used it the day before. if not its 3or4 pulls.
after 2 pulls it needs to sit and idle for a minute and get warmed up but i have always thought it has started easy.
my newest one likes to start on the 5th or 6th pull after its set for a day or 2.
066
I must be doing something wrong.
An 066 that won't start cold in 2 to 3 pulls has a problem.
If you take the filter off and it starts ok, something has to be keeping the choke from closing. Is it opening the the throttle when the choke is on and when on fast idle? Without that, any saw will be hard to start.
I must be doing something wrong.
An 066 that won't start cold in 2 to 3 pulls has a problem.
If you take the filter off and it starts ok, something has to be keeping the choke from closing. Is it opening the the throttle when the choke is on and when on fast idle? Without that, any saw will be hard to start.
Kneejerk Bombas
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Maybe the filter is so clogged it floods it. I doubt it, but it's fun to see ST miss something.
I figured out the problem. I was taking the filter off to clean it, and noticed that I could install the filter cage without the cover (I uploaded the pic with the cover circled), and it started just fine. Anyone have any experience with these filters?
rb, glad to see you located the source of your problem.
It just did'nt make sense to me that a good saw which started fine previously with the regular Stihl filter arrangement, would become difficult to start unless something was hindering it with the new filter system.
It just did'nt make sense to me that a good saw which started fine previously with the regular Stihl filter arrangement, would become difficult to start unless something was hindering it with the new filter system.
