I would check the fuel tank next. The fuel filter might be blocked or the vent line or fuel lines might be kinked.

@HomeGaragechannel

Жыл бұрын

You're headed in the right direction !

@TheGhostzZ

Жыл бұрын

@@HomeGaragechannel honestly from the way it ran i would have thought of a crank seal leaking air into the crank case

As I was at a pawn shop today, I ran into an older fellow that has this same exact chainsaw, and, brought it in to put a new carb on it. He was unsure of what to do and I told him I do small engine repair and he sent me to work. The carb kit came with an intake boot, and, little did I know what I was getting into with that. He wanted the new lines and intake boot and all installed, so I took it home and will take it to my shop tomorrow. I would suggest inspecting that intake boot, but (spoiler alert) you will need to remove the entire engine to do so from the main plastics. I got down to the clutch assembly, which, once removed, you can then remove the engine. Hope this helps!! Love your videos!!

@HomeGaragechannel

Жыл бұрын

thank you for the information Flaming Fox Productions

Because you know what your doing an you respect everyone's equipment that's why I like 👍 you so much

@HomeGaragechannel

Жыл бұрын

I appreciate the Kenneth Drown, I try my best.

Man I wish I could give you advice but I’m here to learn 😂. Can’t wait to till the next video

@HomeGaragechannel

Жыл бұрын

lol.. I appreciate it man, don't worry, I typically get them fixed either way.

As always another excellent very detailed video! Thank you home garage you’ve helped me a lot! But honestly I would probably start with a cheap aftermarket carb then see what happens..

@HomeGaragechannel

Жыл бұрын

thank you Chris's garage and that's a very good idea.

@christopherchang115

Жыл бұрын

@@HomeGaragechannel thank you home garage!

@erniemoore2365

Жыл бұрын

Diaphragm

@erniemoore2365

Жыл бұрын

Sounds like it's not getting fuel

@erniemoore2365

Жыл бұрын

Try another carb and check fuel line

try adjusting the rocker arm height, it worked for me in a brand new ms170 that was bogging down when squeezing the throttle, moving the rocker arm up it will deliver more fuel to the engine, it may work for you too

@HomeGaragechannel

Жыл бұрын

ah, you make good point.

You can remove the periscope from the original carb and put it on the new carb. I have done it lots of times. My guess is tank vent. However you can adjust the Stihl carb, but you will need a very small torx bit or jewelers screwdriver. There are very small torx bit holes in the adjustment holes, which you can adjust like most other saws. I have a brand new ms 170that I found to me turning over 14,000 RPMs. I backed out the high jet a quarter of a turn and dropped it down to a respectable and safe 13,030 RPMs. I had to use the smallest jewelers screwdriver that I have. It must be a #1 or #2 torx bit slot in the adjustment hole.

I guess I would keep digging os i Could Look for otherproblems Thank you for the video

@HomeGaragechannel

Жыл бұрын

no problem

The stihl ms 170 has adjustments scruws but the are hidden very well

I had a similar problem with my chainsaw. It turnout that the fuel line had a crack but it was in in tank just below the grommet. The carb was sucking in air and fuel

@HomeGaragechannel

Жыл бұрын

I wish this was the situation but the fuel line was already replaced before I got it.

@brucecoleman7412

Жыл бұрын

@@HomeGaragechannel Rule #1 is always start at the beginning. Never assume that someone else’s previous repair was done correctly. That can have you chasing your tail for quite some time. A tiny nick, split, or a loose fuel line can give you fits. Replace the fuel filter and lines and don’t look back. Just because a part is new doesn’t mean it’s good.

Looking forward to your follow-up video. I won't spoil the ending.

@HomeGaragechannel

Жыл бұрын

thank you for that, the answer is just weird but it might make since to those that know.

check the intake boot, impulse, and fuel line.

@williambray4134

Жыл бұрын

This

@HomeGaragechannel

Жыл бұрын

thank you Matt Fleming

Hey mate, Great vid. Yeah if they wern't waing on it and i wasn't too busy, i would dig further you never know what you may learn. Cheers

@HomeGaragechannel

Жыл бұрын

that's the plan thank you Aussie nebula

Considering all the junk in the carb I'd be looking for a clogged or broken fuel line and filter. Also check the tank for crud and the vent tube.

@HomeGaragechannel

Жыл бұрын

that's very possible

Good videos 👍🏼👍🏼👍🏼👍🏼

@HomeGaragechannel

Жыл бұрын

Glad you like them!

i would take off the muffler and check the exhaust port if its blocked it can cause these kinds of problems and can also give an artificially high compression reading

@HomeGaragechannel

Жыл бұрын

good idea!

What liquid do you have in your rejuvenation bath for the diaphragms?

@igsbs9075

Жыл бұрын

that's brake fluid

@word1901

Жыл бұрын

AT-205 would be my bet

Seems to me like if the fuel filter is clean and line is good, it's getting unmetered air from somewhere. Crankshaft seals, case seals or intake maby? After saying that, is the metering lever set too low? Also worth trying it with the fuel cap loose to eliminate the possibility of a bad vent. Thanks for sharing👍🏻 look forward to hearing what the issue ended up being!

@HomeGaragechannel

Жыл бұрын

ah, you're definitely going in the right direction

My next thing to change would be the spark plug, i’ve had the same symptoms on a Honda mower engine & i was sure it was fuel related but instead it was a faulty spark plug.

@HomeGaragechannel

Жыл бұрын

that's very interesting

As others have said, check the rest of the fuel system, if that’s not the problem, it could be an air leak somewhere

@HomeGaragechannel

Жыл бұрын

that's good advice, thank you Hester's Workshop

I'd change the plug to what it calls for, NGK BPMR7A, not use HIPA plugs. Change the fuel line and filter. Get an OEM carburetor as THAT model uses a cheap carburetor. Stihl sells them for around $20. But, honestly, I think it's the plug being bad. I've run into that quite a bit honestly. If changing everything doesn't work, then it needs a new coil which isn't cheap for the OEM Walbro coil it needs. The MS170-180 use duckbills as vents in the oil and fuel tanks FYI.

@HomeGaragechannel

Жыл бұрын

thank you for the information

Yeah i know the feeling i get seconds, thirds, sometimes fourths, sometimes i will assess the unit and turn it away because of the hack job's that have been done to it. I have learned no to be worried about being direct with a customer as my excellent work always keeps the bill's paid.

@HomeGaragechannel

Жыл бұрын

I like that a lot, your directness is very refreshing

Always replace the fuel filter, there cheap. Check for leaks from the carb. Never buy a cheap aftermarket, unless you have to of course. You can also pull the fuel filter and check for leaks that way also.

@HomeGaragechannel

Жыл бұрын

ah,, you're headed in the right direction!

I would check for an air leak. The crank seals on the 180 are not the best and l would assume the 170s are the same sadly. Good luck!

@HomeGaragechannel

Жыл бұрын

that would be a good idea.

I have a stihl trimmer doing the same think and even when I just the carb it still dose the same sort of thing

@HomeGaragechannel

Жыл бұрын

unfortunately you and I are in the same boat.

Ive had this happen on a customers saw, unscrew the idle speed screw, i dont know why, but it worked.

@HomeGaragechannel

Жыл бұрын

really? that's an interesting idea. thanks

Sounds like lean running so either carb or a vacuum leak. Non-adjustable carbs are a BIG no no to me but that's what we have to put up with a lot. I'll get an adjustable if I can find one if I'm keeping the machine. If not, it might go on down the road. I don't have enough hair left to leave it on a rock because of banging my head on it trying to figure something out that can't be manipulated. The 261 has instructions on how to readjust the carb if it gets off kilter BUT it's commercial grade and not entry level. Battery stuff would be their way to go. BLESSINGS

@HomeGaragechannel

Жыл бұрын

this one is going to be tricky for sure.

I like a challenge. I would keep digging for the problem.

@HomeGaragechannel

Жыл бұрын

me too!

Could there be a crack on the intake boot?

@HomeGaragechannel

Жыл бұрын

it's possible, but this saw has not been ran, all that much.

how much fuel is in the tank? Maybe there isnt oxygen flow in the tank , mine got the same or very similar behaviour , definitely lack of fuel .

@HomeGaragechannel

Жыл бұрын

thank you Czecher86

Whew. After reading all the suggestions and your replies I am left with a bad Goer. Lets see. It does not appear to be fuel blockage, air leaks, muffler blockage and not the coil. I wonder if it could be a grounding issue with the kill wire is all I am left with.

@HomeGaragechannel

Жыл бұрын

that's a good idea, and I appreciate you going thru the information that's available before coming up with an idea. You're efforts are very welcome D Butler

Its sucking air. Either the intake boot, cylinder gasket, or crankshaft seals might be letting air in. Take the top cover off, have some carb cleaner or WD40 or whatever, start it and spray around the intake boot. If it doesn't change the way it runs, it'll probably die out. Start it again and spray around the intake gasket. The seals don't really go bad unless its old. I want to say its the carb because I saw a small brass jet in there. I'd hate it to be rubbish under those oblong welch plugs. If it's not sucking air, I'd go straight for the jet. Make sure your rocker arm is flush with the carb body (diaphragm mount).

@HomeGaragechannel

Жыл бұрын

that's a pretty good possibility

I recently found out that the fuel injected V twin Kawasaki engine being sold on commercial grade equipment is currently being recalled because they’re catching on fire. Something to do with the high pressure fuel line rubbing against moving parts and starting leaks that can lead to a fire.

@HomeGaragechannel

Жыл бұрын

I'll have to look that up, but yes that's big issue if it's true.

Iv seen this problem in saws with a blocked tank vent or impulse line.

@HomeGaragechannel

Жыл бұрын

both good idea.

I'd keep digging into the fuel system.

@HomeGaragechannel

Жыл бұрын

thank you TK Mad.

What chemical is in the rejuvination bath?

@HomeGaragechannel

Жыл бұрын

it's brake fluid

Hey bro what's up? I would personally keep checking the fuel system to see if I can figure out the problem.

@HomeGaragechannel

Жыл бұрын

yep that's the plan, thank you Ramadin Sookhoo.

One thing I have learned with Stihl products they like NGK spark plugs you can’t really use any other spark plug don’t know why but that’s one thing I would replace on that saw

@HomeGaragechannel

10 ай бұрын

yes agreed

I would get an adjustable carburetor for it. If it continues to run lean then a pressure test is in order..

@HomeGaragechannel

Жыл бұрын

good idea, thank you Joe W.

I am wondering if it isn't the spark plug or the coil

@HomeGaragechannel

Жыл бұрын

it's possible

If it is not the carb it is maybe a leak in the crank case i had this problem on a stiehl Av024 and i seached for hours There are two sealing rings on each side of the crank case. To test it block the intake the exaust and putt 0,5 to 0,8 bars of ptressure throug the spark plug opening

@HomeGaragechannel

Жыл бұрын

that's a lot pressure for testing for a leak on a seal that typically only see vacuum.

@aloda23

Жыл бұрын

@@HomeGaragechannel yes but it is easy to test with pressure That seal has not to bee that thight You can although apply pressure and vacuum just with your mouth. That would be enough.

Did you hear it idle up before it shut down. This tells me it is a cue delivery problem. Tank vent,fuel line, etc.

@HomeGaragechannel

Жыл бұрын

yep you are correct, as it runs out of fuel, It will idle open right before stopping

9:03 why there a needle bearing on the back of the carburetor

@HomeGaragechannel

Жыл бұрын

that's how they close passages

Sounds like you have an intake leak by chance on the Kranks side or something

@HomeGaragechannel

Жыл бұрын

it's always possible

i,d check out the fuel tank and fuel lines as they might be clogged and kinked etc.

@HomeGaragechannel

Жыл бұрын

you're headed to the right direction!

@Patrick4959

Жыл бұрын

@@HomeGaragechannel for sure mate and never hard to look into etc.

I would keep digging. Mick's mowers uses wd40 to clean carbs and he says it works great.

@HomeGaragechannel

Жыл бұрын

really I never asked what he used, thanks.

I think it gets some extra air from somewhere.

@HomeGaragechannel

Жыл бұрын

that's a good possibility

I wouldnt soak the diaphragm in brake fluid because it could expand.

@HomeGaragechannel

Жыл бұрын

thank John Evans

my guy, at this point you should open a small engine repair shop

@HomeGaragechannel

Жыл бұрын

I know right!

I wood do à pressure test on the carb and the chainsaw to see if there is a leaking gasket somewhere

@HomeGaragechannel

Жыл бұрын

that's a good idea.

Ok, not always, but it sure feels like it sometimes. 🙂

@HomeGaragechannel

Жыл бұрын

this one is going to be a strange repair.

I can say from experience the MS170 is definitely one of my least favorite chainsaw that Stihl makes. For the power and reliability it's might be better to buy a different brand if you buy a new chainsaw like a Poulan, craftsman or even a Ryobi. But i guess you get what you pay for.

@HomeGaragechannel

Жыл бұрын

I appreciate the insight

@markvincent5241

Жыл бұрын

I bought a ms251 a few years ago. Brand new from authorised dealer. The bar got badly scorched on first use as the oil wasn't getting through to the chain. Took it back and rectified. But still have a badly scorched bar.

You’re the one expected to fix it because when it’s owner asked you, you said yes! 😁 In my experience, if you do a good job at a fair price, you’ll be getting the broken equipment first instead of ‘Mr. Can’t Fix It’ from thereafter, so you probably won’t have to clean up someone else’s mess anymore!

@HomeGaragechannel

6 ай бұрын

you make a great point

Non adjustable jets are a requirement of EPA. Since this is not a Strato saw EPA requires non-adjustable carbs to pass their emissions tests.

@HomeGaragechannel

Жыл бұрын

I see

Second my guy!

Tank vent? Also I wouldn't trust that spark plug, Hipa makes ok replacement carbs but spark plugs, probably not so much.

@HomeGaragechannel

Жыл бұрын

Yes the tank vent might be an issue. Not sure about the spark plug

I will take the muffler off and check to see if the port is partially plugged. 🤔🤔

@HomeGaragechannel

Жыл бұрын

good idea, thank you RayFpv!

0:32 Mines the opposite can’t stop from flooding

@HomeGaragechannel

Жыл бұрын

have you considered replacing the carb?

@wymonwilson6274

Жыл бұрын

@@HomeGaragechannel next step

@wymonwilson6274

Жыл бұрын

I rebuilt it. new diaphragm ,needle , and gaskets still flooding

@HomeGaragechannel

Жыл бұрын

carb is it then

Check for air leaks and impulse.

@HomeGaragechannel

Жыл бұрын

thanks

Run a pressure test on the cylinder

@HomeGaragechannel

Жыл бұрын

thanks

Impulse line maybe

@HomeGaragechannel

Жыл бұрын

it's possible

After that I would do a leekdown test

@HomeGaragechannel

Жыл бұрын

the following video shows what happened to it

Change the spark plug put an NGK in instead of the Chinese one that's in it.

@HomeGaragechannel

Жыл бұрын

good possibility but stopping after less than a minute of running, and being able to start again, only to have it again, would make it a very special spark plug indeed

My guy, people remove it cause of blockages, like a generator. And most people don't know how to clean it

@HomeGaragechannel

Жыл бұрын

thanks

That hipa plug isnt THE problem but it will be a problem

@HomeGaragechannel

Жыл бұрын

not sure why It was in there but must have been from the last guy that worked on it.

The chainsaw might have an air leak

I'd send it to a mechanic.

@HomeGaragechannel

Жыл бұрын

nothing wrong with that, just the bill

Keep digging. Try running it of a test fuel tank

@HomeGaragechannel

Жыл бұрын

thank you Russell Houghton and that's a great idea.

That idle seems way too high. Probably an air leak.

@HomeGaragechannel

Жыл бұрын

yes it's hard to tell since the bar and chain is not on there.

I hate 2 cycle… I would look further… On those cheap kits I never trust the spark plug and have mixed results with fuel filters. I hate 2 cycle You also had someone else work on the machine could have messed up fuel line and filter during install. I hate 2 cycle

@HomeGaragechannel

Жыл бұрын

thank you Pattay's Performance, it's always nice to see you in the comments.

Nothing to do with the carb it’s sommet in the tank not getting enough fuel the carbs working running fine just might be blocked in the air filter or fuel filter or lines I’d strip it all down start again new everything in

@HomeGaragechannel

Жыл бұрын

LOL.. you are very close to the answer!

@alexfarnell3275

Жыл бұрын

@@HomeGaragechannel mention me in the next vid on this saw just so Ik how close I was

Air leak.

@HomeGaragechannel

Жыл бұрын

If it is, then it would be the most interesting air leak I've seen.

Throw that Hipa trash out, I used their stuff as a brand ambassador, what a mistake

@HomeGaragechannel

Жыл бұрын

thanks

First

@HomeGaragechannel

Жыл бұрын

thank you Warrens Outdoors