good day guys and girls I already have a couple videos on my channel on how to
adjust the carburetor on a chainsaw how to adjust the carburetor on a grass trimmer
strimmer weed eater whatever you want to call it got a couple quick links up there and the
information button again for you to get back to those real quick I thought I would do a
video real quick here for you specifically on how to adjust the carburetor on a leaf blower
welcome back to Steve's Small Engine Saloon everybody we're gonna adjust the carburetor
on a leaf blower today this is how I adjust the carburetor on a leaf blower I know there's
other ways that other mechanics might do it I've been doing this method several times a day for
years now this works for me so I'm gonna share that with you today I also have a apparently a
gigantic bottle of Corona to accomplish this job today it's not going to take you anywhere near
that bottle oh damn that's good it's not going to take you a whole one of those to get do this it's
not that hard guys first thing that I want you to do is make sure that your blower tube is installed
on the unit and also your air filter make sure that you have a nice clean air filter that's
on the unit those two things will affect how it runs have those two things on there when you're
doing what I'm about to show you now this video is assuming that your blower already runs if it
starts and runs but just runs terrible and it just needs some fine-tuning on the carburetor that's
what we're showing you today there could be other things wrong with your blower we're just showing
you the fine tuning on the carburetor today first thing I want you to do especially on this model
right here it's a BG55 Stihl blower the newer models of these are a BG50 we got to get the
limiter caps off the limiter of caps are these little plastic caps that stop you from turning
the high speed in the low speed too far in or too far out so you can destroy your engine you
could turn it about a half a turn not enough for what we're gonna do right now I'm gonna show you
how to get those limiter caps off on a carburetor that's off of the unit just for clarity purposes
when I switch to the close-up you don't need to take your limiter cap you don't need to take
your carburetor off to get these limiter caps off this is how you get those limiter caps off
put a big flat screwdriver in there like that get it underneath that limiter cap and all you
got to do is twist the screwdriver and it pops that limiter cap off just like that now that's
for a Stihl brand leaf blowers you're gonna find that on some Echos you're not gonna see
those screws on some of them out there it's gonna either look like this here's a Zama carburetor
with no noticeable adjusting screws on it here's a Walbro with no noticeable screws on it I have a
video also on my channel I'll put a quick link for you up there and that I button again it's
called hidden screws that's what you guys want to look at go back to that one hidden screws
it'll show you where those are you adjust these exactly the same but on that video I show you
where the low-speed screw is and the high-speed screw is on those now if you're real lucky you
got a Husqvarna or a Poulan or something like that where you can see those screws but they're
not limiter caps you pop off what they do is they make you go and buy a specialty screwdriver
specialty adjusting screwdriver to turn those I got a link on my description of this video that
takes you back to my website stevesmallenginesaloon.com if you go to my website there's a tab
at the top that says tools and parts you click on that it'll take you back to a site where I
actually have those specialty screwdrivers that you might need for doing that we're gonna warm
this thing up start it up like normal rev it up warm it up obviously we're gonna take it outside
when I switch through the close-ups of doing this I'm taking it outside carbon monoxide kills high
speed screw first warmed up we're gonna pin that throttle all the way as fast as the thing can run
now we're gonna start turning that high-speed screw the one that's closest to the air filter
we start turning that all the way not all the way in we start slowly turning it in don't let
go of that trigger keep it at running at high RPM start turning in slowly and you're gonna
notice a point where the RPMs start to come down now start turning it out counterclockwise it's
gonna come back up to high RPM and then you keep turning it out and it is gonna start dropping off
again there's two points there you turn it in it's drops off you turn it out it drops off find that
sweet spot I call it the sweet spot where it's running at the fastest RPM possible once you
find that point right there turn it out again full throttle turn it out until you just hear
those RPMs coming down now turn it back in until it just reaches that point until you get that nice
humming sound again just that beautiful humming sound I love that sound you'll hear it when I
do it for you on the close-up that's where you want to leave that right there it's favoring the
high speed screw a little bit on the rich side you screw I'm gonna take it outside right now
and do a close-up for you so you can see and hear how I do that high speed screw let's go
okay so now you got that high-speed screw is probably exactly perfect we're gonna switch to
the low-speed screw now which is the one that's closest to your engine the one that's farthest
away from your air filter we're not pulling the trigger now it's just sitting there idling similar
to what we did with the high speed screw you're gonna find a sweet spot in there you're going
to turn that in until the RPMs drop and then you're going to start turning it out and the
idle is gonna come up too high and the fastest is idling and you're gonna keep turning it out
until the RPMs drop again find that sweet spot in there again where it's idling the highest
as it can now what you want to do is turn it out again really slow just let it sit there and idle
and just listen turn it out really slow and you're gonna all off a sudden hear where those RPMs just start to
come down you're gonna go oh that just started to slow down a little bit there that's where
you want to leave it again favoring it on the rich side a little bit on that low speed screw
if you do what I just told you right there you should have excellent acceleration when
you punch that trigger it should come up almost instantaneously to the high speed where it's
humming is as good as it can sometimes on a finicky carburetor I got to go you know
back and forth a couple times and just redo what I did until it's perfect the last thing
we need to adjust is the idle screw it's not the low speed and the high speed screw that
we just played with the idle screw just simply turns the RPMs of your engine up or down when
your units just sitting there idling in or out until it's running comfortably for you and it's
not running too slow where it's gonna stall on you on this particular model the idle screw is
right down that hole right there now I do got to bring up one more thing especially on this
model right here if it doesn't ever come up to high RPM where you know it just not revving up
high enough it's not something to do with your carburetor I have another video on my channel
again it's up there in your information button it's called how to repair a Stihl that doesn't
rev up completely different problem than a carburetor adjustment check that one out
if you're running into that problem I think that's it guys I think that's all I can do
what can I say I hope you liked that give me that thumbs up button if you liked it I hope
I saved you some money that's always what I'm trying to do you didn't have to take it into a
shop and get them to fix it I hope that's the case subscribe to my channel if you already
haven't and share it with your friends if you want now I can go finish my beer Steve out