How to Adjust the Carburetor on your snowblower with a Tecumseh engine. Visit my channel for more repair videos.

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Author joe18370 ( ago)
my sow blower will only run with the chock closed help

Author joe18370 ( ago)
where it will only run with the chock closed even after the engine has been
running for half an hour.

Author John M ( ago)
Hi Dony,
i have the same carburetor on my mtd snowblower. when it runs the muffler
glows cherry red but it doesn't sound like it's idling too fast. what could
be causing this? the carburetor I have has a fixed jet on the bowl with an
air idle mixture screw (like a hybrid of the two you showed in your video)

Thank you!

Author anniversary4 ( ago)
Thanks for yet another great video. I was working on my neighbors Toro
snoblower with Tecumseh HMSK80 engine. OIt is just a few years old and does
not have adjustable mixture screws..Seems to high speed rev a bit slow and
the end of this video clearly explains how to adjust this. I want to speed
it up a bit but don't want to risk going too far and damaging the engine.
(per other videos you have). What is the nominal high speed RPM for that
series of engines or where can I find it?

Thanks Don

Author Twodose ( ago)
What should the idol and full throttle rpm be on a tucumseh ohsk70?

Author M Gomez ( ago)
Donny, installed new carb with adj. screw like this one but leaks from it.
will new oring fix it?

Author StChinook ( ago)
@donyboy73, at 1:05 you mention that the second carburetor has no idle
mixture screw. There is one, it's behind the grey plastic cap.
Snowblower Craftsman # 536.886260 (9hp, 26")
Engine # 143.019003 (Tecumseh)
idle mixture screw, diagram key:#20 part number: # 640016, Craftsman
manual, pages 50,51
The grey plastic locking cap is a piece of junk, use blue tread-locker

Engine Low RPM 2,000
Engine full throttle RPM 3,700 - 3,850
Without a (proper) timing light, you can check the RPM with a Smartphone
and a stroboscopic LED app. most of them are free. They are not ultra
precise, but it's free. ; )

Thanks for posting the video.

Author Robert Waid ( ago)
nice detailed video don. pretty soon we ll be working on those carbs.

Author CB Tech ( ago)
Hey. I have a question for you. I have a Craftsman 7.5hp OHV Snowblower.
It had a bent push rod. I put a push rod in it and it fired right up.
Then i shut it down, and it will not restart. When I go to adjust the
valves, it seems like the valve timing is off. Have you seen that. The
intake valve opens when the piston is coming up. Can the cam gear jump.

Author ron martin Mhg ( ago)
Nice one Donny. On my weed eater TD 40 The carb seems not to have a mixture
adjustment screw. Is the mixture controlled by the throttle needle? If so,
what notch should it be held in? The machine is running rich and just to
keep it running the throttle slide is way above the idling adjustment
screw. Thanks again for your videos.

Author John Nelson ( ago)
This was awesome! Just what I was looking for.

Author tony nourbusiness ( ago)
thk u i got it running i just got to play with it..

Author Joseph Anderson ( ago)
Thank you for your Videos on various small engine problems. I'm so glad
that I'm a subscriber to your channel !!!

Author M Morrissey ( ago)
Donyboy73 - thanks for the instructions. I followed these last fall and my
Toro ran better than it has ever run, and ran well through the record
setting Boston winter. Thanks for taking the time to make this video.

Author Pete Massey ( ago)
Very clear instructional video. Definitely removes the uncertainty I had
when approaching this carbs adjustment. Nicely done. Thank you!

Author John Sin ( ago)
Good job.

Author goodfly1 ( ago)
love all the tips ,i have a 8hp snow king with a tecumseh that in dark you
can see fire out exhaust and truns muffler red hot what could cause this ?

Author John Tumolo ( ago)
Excellent job. Easy to follow. 

Author rojasj10 ( ago)
My Ariens 932 % + 2 Sno Thro with a Techmuse HS50 engine has had a problem
from day one where it will only run with the chock closed even after the
engine has been running for half an hour. As a result I have not used it
much even though it is twenty years old. This evening I removed the bowl
and main jet and everything looks new and clean. Just in case I cleaned the
main jet. Of course the spark plug gets fouled up do to the way I have to
leave the choke. Where would I start to fix this problem?

Author Kevin Logozzo ( ago)
Hi, thanks for posting these, they are very helpful. I have ~2003 Tecumseh
without the adjustable fuel mixture screw under the bowl. Is there a way to
adjust the fuel/air mixture on this carb? I've noticed just this year a
reduction in power where the engine struggles with even 5" of light snow. I
have to go very slow. Now it's really starting to struggle and I noticed a
blue flame coming from the exhaust when under load. Might have been doing
this before but it's usually not too dark out and it wasn't noticed.
Cleaned the bowl and jet although they looked very clean. I always use
fuel with stabilizer. I am replacing the spark plug tonight too. Any

Author Bertminator ( ago)
I have a similar snowblower (as the older style), and wonder if you have an
answer for me. Yy starter spins nice & smooth (no rough sound at all),
however in -40° C weather, the starter gear won't engage the engine, but
will still be spinning nicely. Basically the gear doesn't come out enough
to engage the engine gear (flywheel or whatever you want to call it). I
already lubricated the starter gear with silicone spray as well as
penetrating oil (NOT WD-40), and still on cold days it won't engage. It
engages fine if the snowblower is in my shop and warmed up. Any ideas or
tips would be great. Thanks.

Author bilibob rut ( ago)
My 8hp keeps backfiring like crazy on full throttle, what should I do?

Author Brian Marzan ( ago)
Hi Donyboy73,
First, thank you for taking the time to film these videos. All the shops
here in New England are backed-up for three weeks or more, with more snow
on the way, so I’m trying to maintain my Toro snowblower with a Tecumseh
HMSK80 the best I can. I just installed one of those $18 replacement
carburetors from China. The blower is running better with the new
adjustable carb, however it is leaking gas from the fuel adjustment screw.
I’m having to use my fuel shut-off and then dump the bowl as a work around
for the problem. Ideas on how I could fix the leak would be appreciate.
Thank you.

Author aaron schoessow (1700 years ago)
Hello I have watched your video on how to adjust the carburetor on my Toro
it is a 8 horse. Tecumseh engine. Still seems to backfire out of the
exhaust quite a bit... I pulled the air mixture needle. Also have turned
out the needle at the bottom of the float bowl. Turned it all the way in.
Then out one and one quarter turns. I also did this with the air mixture
needle so it is at one and one quarter turns out. The cover on this, I have
removed, for easier access... Will that cover make that much difference???
Also I just bought a new fuel cap. Any suggestions you may have or
questions please feel free to ask. Thanks for the help...

Author INTERNA9 ( ago)

Author Joe W ( ago)
I've got an older Tecumseh 5hp snowblower. I bought a brand new carb off
Ebay (Tecumseh branded). It runs great for 2 minutes and as it gets warmer
runs poorer and poorer as it gets hot. I'm stumped. Any ideas? Points?
Coil? Spark seems fine. 

Author d barboza ( ago)
Thank`s for the help!

Author Frank Rivera ( ago)
Great video! Thank you for all of that useful information.It wad just what
I needed to learn. Thanks again!!!!

Author 78726222 ( ago)
got it. just needed to remove the cover...

Author 78726222 ( ago)
thanks I will try wiping it. I pulled the plug wire but didn't see it was
wet. Where is the intake to spay into?

Author 97197mech ( ago)
Donyboy, I'm trying to fix my neighbor's Toro snowblower with Tecumseh
HSK60-76008B (H) DOM 6853D Engine. The problem was it wouldn't run without
the chock on fully and even then it cut out every minute or so. I removed
the carb and found the float was not adjusted properly and the needle valve
seemed to be sticking. I soaked the carb overnight in carb cleaner then put
a wire through all visible passages, installed a carb kit, adjusted the
float, set the idle mixture screw to 1¼, set the bottom mixture screw to
1½, drained the fuel and refueled with fresh fuel. Now with everything
reinstalled I can only get it to run for a few seconds with the choke full
on. I've attempted to adjust the bottom mixture screw out but still can't
get it to run more than a few seconds. I'm thinking there are other carb
passages that may need to be cleaned behind the blanking plugs. Should I
remove them and clean the passages? What is the best way to remove/install
them? Thanks for your help.
Did I do a thorough enough cleaning?

Author 78726222 ( ago)
Donyboy...I have an MTD with the carb with a fixed jet. When snow would
dump onto the carb side if I his a drift it would run rough then be ok. I
imagine from aspirating snow into the intake. This time it stalled and
now wont start even using electric start. I drained some of the bowl with
the drain valve but not all of it thinking if there was water it would
drain out.

Author bmbell1919 ( ago)
Hi Donyboy. I have a 1994 Toro 38180 snow thrower. By design, there is no
low/high speed setting. I am confident that the carburetor is clean, the
spark plug is new, and the oil/gas is fresh. It starts after a pull or
two, and sits idle at about 4,000 RPM. However, when I engage the augers,
that drops to about 3,500 RPM. The issue that I have is that the machine
is unable to handle anything greater than a few inches of snow before
near-stalling. There are three screws that can be adjusted on the carb
itself, and then the governor arm. Forgive my amateur take, but I know one
screw adjusts the idle speed, the second may be the fuel/air mixture, and I
don't know what the third does. I need help understanding where to start
making tweaks to the carb and governor arm. My method (trial-and-error) is
frustrating at times. I am sure there must be an order to the steps, and
if they are done out of order, you end up in circles like I am now. If you
or anyone are able to assist I would be most appreciated. In the right
hands, I know this machine would be amazing.

Author Katherine Niebla ( ago)
Donyboy you speak clearly and slow enough for me to understand how to fix
my snowblower while working on it as well. As a female just learning how
to fix things myself, I want to thank you for a great training you gave me
on the belt tension as well as carburetor.

Author Ian Gans ( ago)
Thanks, dude. Super helpful. I have an old Ariens, but the carb is

Author The89stang1 ( ago)
Donyboy I have a early 70s Ariens snow thro snowblower, when i run blower i
have to keep it one setting away from full choke to keep running properly.
I have the second style carb in this video which i never took apart before.
When i take out screw on bottom of bowl does it have jet attached, i have
cleaned that style jet before just wondering if old style has jet. This is
my guess for needing choke jet needs cleaning. Any help appeciated.

Author brysonz ( ago)
Great video explanation! My craftsmen 9 HP is surging and the muffler has
flames inside. This should so the trick.

Author Darryl Voight (128 years ago)
Thanks a lot Donyboy! I just got an old used Snapper 10HP, 30" the other
day before the "big" storm hit NJ. It ran very rough and only with the
choke on at first. But after watching your video, I was able to get the
idle and full power operation to work just great. 

Author bobriguez1 ( ago)
Thank you, thank you, thank you!!!! My Tecumseh Snow King decided to run
like crap today(during a blizzard)... these adjustments made all the

Author Theo Macris ( ago)
Bummer, just used your settings on my toro 824. The engine idled up too
fast and promptly blew the engine, I assume a rod since there is no
compression. So much for that.

Author TheGurtsmen ( ago)
Thanks a bunch. My dads snowblower ran like crap for years. Cleaned the
carb and tweaked the screws as you did... Good as new. Great video. 

Author Carl Zorro ( ago)
what can it be when you go toward the snow but it turns off as it's going
to intake the snow to blow it out?

Author Robert Jackson ( ago)
First, thanks for taking your time to make these good videos. I have an
Ariens snow blower w/ Tecumseh engine from 1992. For the first time ever,
I have to run with the engine fully choked in order to use the snow blower.
I am no longer able to back off the choke and keep the engine running as
in all previous years of use. Do you think I have debris in the carburetor
or do i just need to adjust the main jet by turning the adjustment screw as
indicated in your video? Should I remove the bowl and clean it out first?
The bowl has never been removed. Thanks, Robert

Author Clare Dejong (223 years ago)
I like that you kept it simply.

Thanks for the information.

Author Bob Berg ( ago)
Hey Dony I have a 1980 model Toro 7/24 and after a motor swap with same
year and model the blower does not run. I may have hooked up the linkage
wrong or set the carburator up wrong. It ran for a littl;e bit and then I
was not able to start it. I did a minor rebuild to the carb and still no

Author sammy 9000 ( ago)
Hi donyboy. I have Stiga snowblower with 8hp Tecumseh and i have a red
glowing exhaust mufler when running full gas. Engine works fairly good maby
litle misfire and some blue flame comes out to mufler, you can see flame
and red glow clearly when you run it evening when its dark outside. Reason
why i ask should i do something to fix it cause i dont want to burn exhaust
valve or something else. What you think is this problem fuel mixture issue
engine running lean or is exhaust valve clearence too small and valve
doesnt close full? Carburetor is that newer model, nozzles cant be
adjusted. I measured engine compression cold motor and it showed 55psi is
that good or bad to that engine? Maby i should measure it again when
engine is hot... cause if valve clearance is too small valve won't close
fully when engine is hot i think? If this problem turns out to be too
small valve clearance, is the job to fix it pain in the butt and do you
have a video where you do a similar job. If i find there allready burned
exhaust valve can i find somewhere a new valve to this motor? I live in
Finnland and i'm pretty sure that i need to order it from USA cause this
blower is probably around year 2000 model and the spareparts this old model
is hard to find our retailers. Sorry my bad english and thanks if you
bother to answer. :)

Author Bruce Albarado ( ago)
hi donyboy73..I have a 8 hp techumseh snow blower I just replaced the
throttle control arm.Put my linkages back where they were.If I throttle up
it wont throttle down..not sure what is happening any ideas would be
helpful..not a small eng guy but have learned a lot from watching your
vids.need help here I'm lost on what to do...please help

Author aWoodchuckTunaMelt ( ago)
I recently acquired a snowblower with a Tecumseh HMSK80 engine from my
grandfather, and long story short i dont have nor can get the original
carb. According to the owners manual it had the non adjustable carb on it,
I, not realizing it at the time, purchased an adjustable model. After
installation and despite my best efforts to tune it it just wants to surge.
Are the jets on the non adjustable model carbs bigger/smaller? Iv spent
hours fiddling with the mixture screws to relatively no change. Any help
would be greatly appreciated, im at my wits end with this thing!

Author pei bossman ( ago)
very good, thank you...

Author Jim Bigger ( ago)
It has the fuel mixture idle screw and the float adjustmen screw on the

Author Jim Bigger ( ago)
I recently put a carb kit in My Tecumseh 10hp and adjusted it to your
recommendations. I found it wouldn't stay running but I moved the engine
speed governor Linkage and it stayed running and ran perfect. I havent used
it since until today and it will not stay running. It's like once the fuel
from priming is used it dies. I played with the linkage a little bit and it
would stay running but at a very low rev. As soon as it tried to rev up -
it would bog out and die.
Any suggestions?

Author tellebracht ( ago)
Awesome! Runs like a champ now!

Author shizermuffin ( ago)
Excellent video. Thank you

Author Verne Potvin ( ago)
Have a Tecumseh 10hp with fuel dump at bottom of bowl and adjusting screw.
Question....I have set up the governor etc and adjusted the fuel mix and
idle. But as oon as I put it under load, the unit bogs down and quits. Any
suggestions ????

Author Raman B. Chauhan ( ago)
Million Thanks. I followed your precise instructions and my 27 year old
Sears Snowblower is still chugging along without ever visiting a shop.
Thanks so much for posting your videos. You are doing us a big favour.
Seasons Greetings to you and your family. 

Author Cheryl Everett ( ago)
My husband bought an old tecumseh snow blower last year. It wasn't running
that well this year. After watching your carb cleaning and adjusting videos
- it now runs fine. He says 'thanks for the great videos!'

Author Jim ( ago)
So my blower would not stay going when i closed the choke - only stayed
going with choke on. I adjusted the engine speed governor and it stayed
going when I closed the choke. Was that the best adjustment/ solution for
my problem?

Author george flanagan ( ago)
Thanks donyboy73 folloe your 3videos on 8 hp carburetor and works fine on
my snowking snow blower thanks again 

Author Tim Miller ( ago)
Hello don I have a 17" snapper le and it doesn't throw snow well even after
replacing padles and scraper. Any ideas. Thanks tim

Author Wayne Perkins ( ago)
Thanks donyboy73, Without your video I'd have been lost. Followed your
suggestions and darn if the John Deere 828d snow blower seems to be
running and idling the best it has in a long while. Thanks so much for
posting your videos.

Author Vin Bellissimo ( ago)
you and I must have learned the same hard way... I drilled out the cover on
my old Simplicity so i could get to the high speed screw. I find your
videos very helpful 

Author Susan A. Enns ( ago)
Thank you very much for an easy to follow video. You made it simple for
someone who knows nothing about carburetors. Much appreciated!

Author Craig Arndt ( ago)
Very helpful Dony. 

Author Andrew D ( ago)
My old Simplicity 8hp snowblower was surging at high rpm's. Your advice for
adjusting the screw under the bowl was perfect. I did take the carb apart
and gave it a good cleaning just so I could feel like I contributed
something. Thanks x 10 to the 6th.

Author Jason1Pa ( ago)
So how do you adjust the newer style carbs? I've messed around with two
other ones that have the old style and I got them to run good with no
surge. Now I have one that someone gave me and it has the new style. It
surges as well,but was shocked to see no adjustment screws

Author donyboy73 ( ago)
the one under the carb bowl

Author Dave L ( ago)
If mine is running rich do I adjust the idle mixture screw?

Author Bolt Speedman ( ago)
it's not a mystery

Author donyboy73 ( ago)
you're welcome

Author SmokinTyres26 ( ago)
I would like to give you a huge THANK YOU for taking the time to post this
video. I just moved from 4000 feet to 7200 feet in altitude and there is a
big snow storm set to hit tomorrow night and thanks to you my snowblower is
running again. THANKS!

Author donyboy73 ( ago)
from it being tightened

Author NotAMystery ( ago)
At 2:26 you say you have the idle mixture screw at 1 and 1/4 turns. Is that
loosened from tight, or 1 1/4 from when it catches? I'm thinking from tight.

Author 10sunden ( ago)
hey dony... i got a 3hp techumseh engine for a old snowblower... it was my
dads and it had broken exaust bolts in it... so i sent it down to a small
engine shop to drill them out and tap the holes... when they gave me it
back a cople days later i noticed that both holes where messed up non
threaded and cracked the outer side of the block not hiting the inside part
of the exaust tho... just where the cooling opens are... could you comment
saying what i should do to fix this??? if its posible

Author FCM ( ago)
Great instructions. Thanks.

Author MrZanadoo ( ago)
Hi Donny, I cant get my blower to idle slow enough it runs perfect but has
just started to idle high after I have used it, the buterfly closes
tight,any ideas.

Author Tony Wesley ( ago)
Very clear video, thank you. I have Tecumseh engines on my snowblower and
my chipper/shredder. Your video provides a great deal of information, I now
feel confident that I can properly adjust the carburetors on my equipment.

Author mike ducker ( ago)
Hi Dony, I can't adjust the carb with your settings of 11/2 and 11/4 it
will only run at 3/4 of a turn and 1/2 on the idle mix. Is there something
else I need to adjust. Thanks

Author Bruce Jennings ( ago)
Hi> thanks for your reply re leaking exhaust valve > I tried looking for
your video posted yesterday but could not locate it. Hopefully you can
provide a link. thanks again.

Author donyboy73 ( ago)
your blower may have a leaking exhaust valve, try using the electric
starter, i am posting a vid monday that you should watch, it will be about
a leaking exhaust valve

Author Bruce Jennings ( ago)
hi donnie> I have a toro 824> It was working perfectly and then ran out of
fuel. I filled the tank again and now it wont start. I have replaced the
plug and fuel filter and put in high octane fuel. All I seem to get is a
blue flame coming from muffler every fifth pull. I will adjust the screws
tonight as per video and give it another try. I also cleaned the bowl and
jets but they looked clean. Any other suggestions. Thank you. Your videos
are awesome

Author James Hedges ( ago)
My 2005 8.5 hp Troy-Bilt Storm 8526 Tecumseh Snow Blower LF318SA has
started to backfire out through the exhaust. It Is is a fixed jet. I
replaced the gas, replaced the spark plug, took the bowl off and sprayed
the carb and cleaned the bowl, and cleaned the fixed jet (the bowl and jet
do not appear dirty). The engine starts on the first pull but then starts
to back fire when running. Any suggestions?

Author Per Inge Lund (823 years ago)
Hello. I have the same problem as you after i clean the carburettor. I have
replace the trottle mecanism upside down if you see what i mean. The blower
start and run good, but nothing happend when i try to give it more trottle.
Loock carefully at the arm coming from the governour and goes to the
throttle controller. Because when you take the carburettor off the motor,
the spring on the throttle arm will "fell down" and it is possible to mount
it in wrong way. Hope this will help you.

Author Alan Schrram ( ago)
I only see how to take off, i see that mine did have one but when i bought
the old owner took it off. Do you know where i can order the parts from.
Thanks on this vid my blower rocks now!

Author donyboy73 ( ago)
do a search on my channel, i have some vids on that subject

Author Alan Schrram ( ago)
How did you put the electric start on your blower?

Author donyboy73 ( ago)
try turning out the bottom screw just a bit, if it doesn't idle well then
unscrew the idle air screw on the side a bit

Author pairdoc ( ago)
Hi, Dony. Great videos! I replaced the carburetor on my snowblower with the
adjustable type you demonstrate in this video. I made the adjustments you
recommended with the throttle in idle position. However, when I increase
the throttle too much (or too fast), the unit sputters and some smoke comes
out of the muffler then stalls. It takes a bit to get it started again
(?flooded). What should I adjust to get this working properly? Too rich or
too lean? Adjust fuel or idle mixture screw? Thanks!!

Author Al Vino ( ago)
Thanks so much for posting this video as it gave me the courage to fix my
25 year old snow blower myself. I bought a new carburetor online for $40,
the original one was pretty much a goner. Did the carb adjustment using
this video and runs like new.

Author MrBikercat ( ago)
Hi, I have a mtd two stage snowblower that was given to me which sat unused
for a couple of years. initially when ever I pressed the primer button fuel
would leak out of carb. after rebuilding carb it still did it. replaced
with new carb and it still does it. do you have any ideas for the cause of
this? thanks.

Author Jon Foster ( ago)
I have a OHSK 120, 8HP and have had running issues. I did the quick clean
of the carb bowl and the nut with holes. Got everything squeekie clean. New
spark plug and gaped properly and new oil. Issue is the engine starts and
runs low, but smooth. Both the throttle AND the choke do not work. Can turn
the choke from open to close and no difference. Also, when I move the
throttle up and down, no difference, though when I push the throttle down,
the engine does quit. What is my issue(s)???

Author Davegobble82 ( ago)
will do, thank you . I really appreciate the help

Author donyboy73 ( ago)
i would also install part number 631021b kit, go to my channel and click
the link to buy small engine parts

Author donyboy73 ( ago)
631867 is the part number for a new bowl

Author Davegobble82 ( ago)
I have the same snow blower that you are showing at the 3 minute mark. The
thing worked great until i tried to use it this year when gas started to
start coming out of where you were pointing to at the 1 minute 18 second
point of your video. Any suggestions on how I would go about fixing this
problem? You seem like you know you stuff pretty well and i would really
appreciate it if you could maybe point me in the right direction.

Author Thomas King ( ago)
Thanks, My snowblower didn't run this good when it was new 18 years ago!

Author Tommyr ( ago)
I have the same issue. Move off choke, it dies on me. I have to leave mine
on choke to use the blower.

Author Tommyr ( ago)
Very well done video! Clear closeups and explainations! Thanks for that! I
have to adjust my choke control, when I move it off choke the snow blower
shuts down. So you have a vid on that?

Author Karen C ( ago)
is the choke ALL the way to the left (off) when you are doing these

Author awakes182 ( ago)
ive cleaned the carb and new spark plug. i can adjust the carb to have it
run somewhat well on half choke. But as soon as i flip the choke off, it

Author donyboy73 ( ago)
you probably need to clean and rebuild the carb, look through my videos

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