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Homelite Blower HB180V carb adjustments.

Can you tell me the initial carb mixture screw adjustments and which screw is the Hi or Lo, left or right? Have been looking for an online operators manual with no success yet. Thanks.

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high speed H=2 turns ,lowspeed L=2 1/2 turns
they are inscripted near the adjusting screws.

regards savumihai71

Posted on Dec 05, 2008


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Model 3200. How should 3 adjustment screws be set(T,low and high for carb)?

Depressing the throttle slightly we listen to the engine. If the engine hesitates to accelerate, the LO screw should be opened 1/8 of a turn. If we open the screw too much, the engine will not accelerate smoothly and start shaking (too rich of a mixture). In this case we should close the LO screw slightly. We repeat this procedure until the engine reacts smoothly when adding power. Meanwhile, a readjustment of the idle speed may be needed.

After the LO mixture has been adjusted, we proceed with the HI screw adjustment. After securing the paramotor, we open the throttle to full power. We turn the HI screw to the left or right until the maximum RPM is reached. From this position just a slight turn to the right should cause a significant RPM drop. This means the lean side of the mixture has been achieved. Immediately we OPEN the screw to the left to prevent the engine from overheating!

Let us repeat once again this critical step:

At full power we tune for maximum RPM, then we close the HI screw more, until a drop in RPMs is noticed. When the drop in RPMs occurs we open the HI screw again until we reach maximum RPMs once again, and then we open the screw more until we have a drop of 20 to 60 RPMs. In this position the carburetor will be perfectly tuned slightly on the rich (safe) side.

Next, we should close the throttle and recheck the idle and the LO screw adjustment. If the carburetor was tuned properly, the idle will return to the normal setting described above.

To put it in a nutshell, if the engine idles and accelerates smoothly, does not smoke heavily and achieves 20- 60 RPM below maximum RPM, the carburetor is tuned correctly.

Nov 22, 2015 | McCulloch Garden

1 Answer

Carb ajustment

Only Info I see is "Homelite Chain Saws" - not much to go on.
Most saws have two carb adjustment screws, Hi, and Lo.
Assuming the saw will start and run enough to warm up, then
adjust the Lo screw in, clockwise, until the motor starts to slow down,
turn only about 1/8 turn at a time. From the point where it starts to slow down, turn it out about 1/4 turn. This should give you a decent idle. Now pull the throttle, and see what happens.
A - Saw runs up to speed, but dies off, or starts to slow on it's own.
turn Hi idle screw out about 1/4 turn.
B - Saw speeds up, but runs sluggish, fat - not real hi end.
Turn Hi screw IN, about 1/8 or so, and try again, or adjust
while running at full throttle. (best way)
IF it won't run well, try turning both screws all the way in to seat them, then come back out about 1-1/2 to 2 turns. this should get you in the ballpark to set things up as above.

Once the saw is running well, adjust the idle screw to a smooth idle but slow enough that the chain stops moving.

Stay safe

Jul 01, 2012 | Homelite Garden

1 Answer

XL 2 auto carb adjustment, idles far too fast


On the left side of the saw, opposite bar and chain, are 3 adjustment screws. The top two are the H, high, and L, low mixture screws. Under those is a screw marked T. This is the idle speed adjuster. Turn counterclockwise to bring down the idle speed. Adjust only when saw is warm and just until the chain stops turning.

Hope this helps. If it does, I'd appreciate your vote. Thanks,

Handie Andie

Apr 14, 2011 | Homelite Garden

2 Answers

I have a hb180 homelite leaf blower and want to know how to adjust the 'two' little screws on the side and what they do

if its the carb screws your talking about
one it for fule mixture the other is for air,,,
air for tickover fule mixture for rev's
if its running well leave them be?

Oct 30, 2009 | Garden

4 Answers

BLOWER only operates at half choke....then shuts off and can;t start again

your mixture screws probibly have to be adjusted.i have a homelite weed whacker and homelite leaf blower.
both had to be adjusted after i used them 6 or 7 times.theres a tool you can buy to move the screws.or you can be cheap like me and use a dremal tool with a cutting wheel on it and cut slots in to be able to adjust with a flat head.
turn the screws clockwise til there just seated,not too tight.then turn each one out counter clockwise to 2.5 turns and start adjusting from there.the first screw is the low setting and the second is the highs. i usally start with the highs.but u can do what you want. u can also youtube on how to adjust.

Oct 23, 2009 | Homelite Consumer Products MightyLite...

1 Answer

Rebuilt carb need air and idel mixture screw settings. Blower runs but only a few seconds and then will not restart.

air fuel mixture screw shoould have initial setting of two turns out from lightly seated,check unit make sure cylinder is tight to base they only have two screws holding them down,if 2 cycle motor has a vaccum leak they will not run properly,also check compression if you have gauge should have a least 100 psi to run properly.

Oct 01, 2009 | Homelite 'Yard Broom' Leaf Blower

1 Answer

What is my lo hi carb adjustment for a Homelite Super XL ? with Homelite/Textron Div. Carb.

Start with 1 turn out from bottom on both and adjust from there as needed. The screw closest the engine is low speed mixture adjustment and the outer is high speed mix. adj. Hope that helps. Dwain

Jul 01, 2009 | Homelite Garden

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