Hi guys I just wanted to Introduce to you my other Channel "Kirkman's Academy" - which i'm just getting started. It's a go-to channel for simple explanations for hard to grasp subjects such as physics, maths and chemistry etc. Here is the link: www.youtube.com/@kirkmansacademy/videos . Thank you so much for looking, and if these topics interest you then I hope to see you the there. Many thanks indeed. Craig 😊👍
Not for nothing from the US of A, I own a fairly large tree service and have been round chainsaws since Homelite xls and super 2s were state of the art but in all my years I have never seen a better teaching tool for this issue than this. Simple, concise, and correct. The animation, narration, and audio are perfect for teaching the point at hand. Thanks for posting, this is going to be put on my list of teaching tools for my team. Very nice bit of work. Cheers and thanks again.
Hi Craig. I absolutely love your channel. I cannot find your contact information anywhere. If you ever want to do a collaboration with Steve’s Small Engine Saloon, reach out to me….
Very good video, clear and easily understood visual aids. One point you might mike to cover is this: your saw was running great and you store it for a few months. When you start it, it bogs (not enough fuel). You adjust the H screw and it runs fine for a few days then bogs again (too much fuel). What has happened? Well the carb diaphragm(s) have hardened in storage (restricting fuel delivery)...but softened up after a bit of use (now too much fuel due to your adjustment)!
This is a great video. I'm currently having issues with my Polan Saw it bog's way down when tilting on side to cut small trees. It's not even a year old. And It's also barely running right upright. I'll check what was mentioned in the video. I've already replaced the spark plug, air filter, and cleaned the carburetor.
Thank you for your king words. There are many reasons why a chainsaw might not run correctly like this but lets look at something I have come across in the past. Try this as a guide: As for your chainsaw issue: Inside your fuel tank, your fuel filter is dangling on the end of the fuel pipe into the fuel. The fuel filter is usually weighted. That allows the fuel filter to follow the fuel, to keep picking it up, when you tilt the saw. If the fuel pipe is too short of the filter has come off or something like that, it does not have the weight to follow the fuel in a tilted position and sucks in air rather than fuel, causing bog. So take a look inside your fuel tank, with an LED flashlight for safety around gasoline fumes, and see if there is something wrong filter wise, or that part of the fuel pipe is split just above the filter. I would try this first and go from there. Thanks Craig
@@TheRepairSpecialist Thank you that's is something I haven't checked yet is the fuel filter and fuel line, I'll look at that asap. I'll let you know one way or the other if that solves my issue. I appreciate the info.
A very good explanation but the problem is many carburetors these day have little or no adjustment. My brand new Honda EU22i generator bogs under a sudden load change and dealer tells me there is nothing he can do.
@@Johnsmith-zi9pu I should have figured. What a load of senseless HS! They'll have to build that many more and send more garbage to the landfills while using more energy to ramp up production. Everything is a scam these days.
Hi there, I love your vids. Can I ask a question pls? I bought an old seized partner saw and have given it the once over. When I give it the full throttle it revs up fine and sounds good but it then starts to run lumpy. The revs dip and go back up and this continues all while holding the trigger in. I have replaced the piston and cylinder, carb kit, gaskets and spark plug. Tuning has never been my strong point but the symptoms don't quite fit the bogging down description. My next step is the fuel line and tank breather vent. Any ideas would be great. Many thanks
Hi Craig. Done all the Tunning as described but when I try cutting wood my saw just stalls out is there something else I need to do to sort it out Dave
I was only thinking about this the other day, and I was thinking of making a video about this topic. I do think the a state of being too Rich on a two stroke engine could cause 4 stroking. I have said before I’m some of my other videos that when the mix is too rich, the engine finds it difficult to combust the rich mix, so 4 stroking could be quite possible. However, the with the general concept of 4 stroking being because exhaust gases can’t escape quick enough from the cylinder and so being a case where their is little or no combustible fuel and air available, then I can’t be 100% sure that a cylinder full of a heavy fuel/air mix will do the same. But some experimentation might just help answer this. Watch this space 👍👍👍
@@TheRepairSpecialist Thank you for your reply. The 4 stroking was brought up in a comment on one of my videos. I listened to other videos on this topic, even though I could hear the difference in before & after, I have some difficulty picking off the 4 stroking sound. Looking forward for your video. Stay well, Joe Z
@@TheRepairSpecialist I'm bogging down in the wood so assumed I need more fuel, but it's smoking ... so that would mean I have to screw down, i.e.the opposite!! Help please!
And the main point there is when it's in to far , not all the way but still run , it sounds like more power but it isn't. The main thing to remember is , that the fuel going in also carries the only oil the engine gets !!! So you can't run it to lean or , Boom , no engine. You have to find that " sweet " spot !
Husqvarna 450 has a high and low port adjustment and an extra one with T on it, i presume that means throttle adjustment, I have bog down when I am attemting to go full revs but does clear. I tried altering the high adjuster screw but it appears to be stuck, i dont want to mess up the screw so left it. Any ideas how to free up?
It sounds like you're dealing with a common issue with the carburetor settings on your Husqvarna 450 chainsaw. The "H" and "L" screws are indeed for high and low speed adjustments, while the one marked with a "T" is for idle speed adjustment. Here's a step-by-step guide to help you: Understand the Adjustments: The "H" screw adjusts the saw’s high-speed performance, while the "L" screw controls low-speed operation. The "T" screw adjusts the idle speed. It's crucial to get these settings right for optimal performance. Addressing the Stuck High Adjuster Screw: If it is truly stuck rather than being screwed too far and tight, then apply Penetrating Oil: Apply a penetrating oil like WD-40 to the stuck screw. Let it sit for a few minutes to loosen any corrosion or debris. Gentle Pressure: Use the correct screwdriver and apply gentle, but firm pressure. Avoid using excessive force to prevent stripping the screw head. Heat Application: Sometimes, applying a bit of heat can help. Use a heat gun or a hairdryer to warm up the screw area, which can expand the metal slightly and help in loosening the screw. Cleaning the Carburetor: Sometimes, a bogging issue is due to a dirty carburetor. Consider cleaning the carburetor or having it professionally serviced. Adjusting the Screws: Idle Speed Adjustment (T Screw): Adjust this screw so that the chain stops moving at idle, but the engine remains running. High and Low-Speed Adjustments: Once you manage to loosen the high-speed screw, make small adjustments. A quarter turn can make a significant difference. Adjust the low-speed screw similarly for better performance at lower speeds. Check the Air Filter: A dirty air filter can affect performance. Clean or replace it if necessary. Consult the Manual: Always refer to your chainsaw's manual for specific instructions and safety precautions. Professional Help: If you're unsure or the issue persists, it might be best to seek professional help. Remember, safety is paramount when dealing with chainsaws. Ensure you're taking all necessary precautions and understand the adjustments before attempting them. If in doubt, professional servicing is always a safe option. I hope this helps. Craig
@@TheRepairSpecialist Thanks for the detailed reply Craig, I will start with a little WD40, both the high a low are stuck firm. The idle speed seems ok as the chain is not creeping, strangely I'm able to turn this screw ok. I keep the air filter cleaned regularly, it's the minute plastic mesh type so I do wash it out and dry it. I will give your guidance a try out today to see if I can fix the annoying bog down. Thanks
Hi guys I just wanted to Introduce to you my other Channel "Kirkman's Academy" - which i'm just getting started. It's a go-to channel for simple explanations for hard to grasp subjects such as physics, maths and chemistry etc. Here is the link: www.youtube.com/@kirkmansacademy/videos . Thank you so much for looking, and if these topics interest you then I hope to see you the there. Many thanks indeed. Craig 😊👍
P.S. Subscription earned!
Not for nothing from the US of A, I own a fairly large tree service and have been round chainsaws since Homelite xls and super 2s were state of the art but in all my years I have never seen a better teaching tool for this issue than this. Simple, concise, and correct. The animation, narration, and audio are perfect for teaching the point at hand. Thanks for posting, this is going to be put on my list of teaching tools for my team. Very nice bit of work. Cheers and thanks again.
I’ve said it before, you really do a fantastic job at explaining things👍
Great videos from someone who obviously knows two-strokes. Thank you👍
Hi Craig, Your videos are always so informative. With your diagrams and description, I've always been able to get it fixed. Thanks so much 👍.
HI. Thank you for your great feedback and for being a valued subscriber for the last 5 years. Craig 👍👍👍
Hi Craig. I absolutely love your channel. I cannot find your contact information anywhere. If you ever want to do a collaboration with Steve’s Small Engine Saloon, reach out to me….
That would be great Steve. Thank you for reaching out to me. I will contact you in the near future if that's ok? Craig 👍👍👍
Very good video, clear and easily understood visual aids. One point you might mike to cover is this: your saw was running great and you store it for a few months. When you start it, it bogs (not enough fuel). You adjust the H screw and it runs fine for a few days then bogs again (too much fuel). What has happened? Well the carb diaphragm(s) have hardened in storage (restricting fuel delivery)...but softened up after a bit of use (now too much fuel due to your adjustment)!
All Episodes -for 2-Stroke Carburetors Here. Thanks. Craig:
th-cam.com/play/PLrlXp3PlwgRI5OLvm3P91LJr1CYnO5TRD.html
I’m a newb and have watched a lot of videos on the subject .. and this video is on the spot..well done man!
Thank you. I really appreciate it. Craig 👍
This is a great video. I'm currently having issues with my Polan Saw it bog's way down when tilting on side to cut small trees. It's not even a year old. And It's also barely running right upright. I'll check what was mentioned in the video. I've already replaced the spark plug, air filter, and cleaned the carburetor.
Thank you for your king words.
There are many reasons why a chainsaw might not run correctly like this but lets look at something I have come across in the past. Try this as a guide:
As for your chainsaw issue: Inside your fuel tank, your fuel filter is dangling on the end of the fuel pipe into the fuel. The fuel filter is usually weighted. That allows the fuel filter to follow the fuel, to keep picking it up, when you tilt the saw. If the fuel pipe is too short of the filter has come off or something like that, it does not have the weight to follow the fuel in a tilted position and sucks in air rather than fuel, causing bog.
So take a look inside your fuel tank, with an LED flashlight for safety around gasoline fumes, and see if there is something wrong filter wise, or that part of the fuel pipe is split just above the filter.
I would try this first and go from there.
Thanks
Craig
@@TheRepairSpecialist Thank you that's is something I haven't checked yet is the fuel filter and fuel line, I'll look at that asap. I'll let you know one way or the other if that solves my issue. I appreciate the info.
@@TheRepairSpecialist I also liked and subscribed 👍
@@jonathan3982having the same issue. Did you get yours fixed?
Saya mengikuti konten pak Craig & menjadikan reperensi untuk chainsaw china.sangat sangat membantu.terimahkasih pak Craig, Alhamdulillah.
Good video mate .. as always some great information..
Thanks mate
Very helpful. Thank you 🙏🏼
You're so welcome!
Thanks,,, love from Nagaland..
Thank you 👍
A very good explanation but the problem is many carburetors these day have little or no adjustment.
My brand new Honda EU22i generator bogs under a sudden load change and dealer tells me there is nothing he can do.
Will changing the carb fix it?
@@nedcramdon1306 Dealer tells me to suck it up, there's nothing I can do.
These things are tuned lean to please the climate crackpots.
@@Johnsmith-zi9pu I should have figured. What a load of senseless HS! They'll have to build that many more and send more garbage to the landfills while using more energy to ramp up production. Everything is a scam these days.
Hi there, I love your vids. Can I ask a question pls? I bought an old seized partner saw and have given it the once over. When I give it the full throttle it revs up fine and sounds good but it then starts to run lumpy. The revs dip and go back up and this continues all while holding the trigger in. I have replaced the piston and cylinder, carb kit, gaskets and spark plug. Tuning has never been my strong point but the symptoms don't quite fit the bogging down description. My next step is the fuel line and tank breather vent. Any ideas would be great. Many thanks
Hi Craig. Done all the
Tunning as described but when I try cutting wood my saw just stalls out is there something else I need to do to sort it out
Dave
what type of wrench do I use to adjust fuel coming to carburetor?
What am i missing on the tune if my saw only bogs down for a split second and then revs fine both in and out of wood…only does it on the start up…
What are the signs....that we must change carburetors ❤
Why does my chainsaw changes its own rpm and sometimes dies when fliped on its side?
Your videos are the best.
Hi Craig, could too much fuel on the H cause 4 stroking on the 2 cycle engine?
I was only thinking about this the other day, and I was thinking of making a video about this topic. I do think the a state of being too Rich on a two stroke engine could cause 4 stroking. I have said before I’m some of my other videos that when the mix is too rich, the engine finds it difficult to combust the rich mix, so 4 stroking could be quite possible. However, the with the general concept of 4 stroking being because exhaust gases can’t escape quick enough from the cylinder and so being a case where their is little or no combustible fuel and air available, then I can’t be 100% sure that a cylinder full of a heavy fuel/air mix will do the same. But some experimentation might just help answer this. Watch this space 👍👍👍
@@TheRepairSpecialist Thank you for your reply. The 4 stroking was brought up in a comment on one of my videos. I listened to other videos on this topic, even though I could hear the difference in before & after, I have some difficulty picking off the 4 stroking sound. Looking forward for your video.
Stay well, Joe Z
@@TheRepairSpecialist I'm bogging down in the wood so assumed I need more fuel, but it's smoking ... so that would mean I have to screw down, i.e.the opposite!! Help please!
@@JOEZEP54 You usually want a chainsaw to 4 stroke when not under load, but to lean out in the cut, just not lean out too much.
@@ChrisRJ Thank you.
What if it bogs only when you start to pull the trigger, then it goes away?
Great video. What program did you use for the diagrams?
Thank you for your kind feedback. I used photoshop premier elements package. 👍👍
What causes it to change in the first place I wonder.
Hi my saw start boging when I’m cutting with it
And the main point there is when it's in to far , not all the way but still run , it sounds like more power but it isn't. The main thing to remember is , that the fuel going in also carries the only oil the engine gets !!! So you can't run it to lean or , Boom , no engine. You have to find that " sweet " spot !
Absolutely
Husqvarna 450 has a high and low port adjustment and an extra one with T on it, i presume that means throttle adjustment, I have bog down when I am attemting to go full revs but does clear. I tried altering the high adjuster screw but it appears to be stuck, i dont want to mess up the screw so left it. Any ideas how to free up?
It sounds like you're dealing with a common issue with the carburetor settings on your Husqvarna 450 chainsaw. The "H" and "L" screws are indeed for high and low speed adjustments, while the one marked with a "T" is for idle speed adjustment. Here's a step-by-step guide to help you:
Understand the Adjustments: The "H" screw adjusts the saw’s high-speed performance, while the "L" screw controls low-speed operation. The "T" screw adjusts the idle speed. It's crucial to get these settings right for optimal performance.
Addressing the Stuck High Adjuster Screw:
If it is truly stuck rather than being screwed too far and tight, then apply Penetrating Oil: Apply a penetrating oil like WD-40 to the stuck screw. Let it sit for a few minutes to loosen any corrosion or debris.
Gentle Pressure: Use the correct screwdriver and apply gentle, but firm pressure. Avoid using excessive force to prevent stripping the screw head.
Heat Application: Sometimes, applying a bit of heat can help. Use a heat gun or a hairdryer to warm up the screw area, which can expand the metal slightly and help in loosening the screw.
Cleaning the Carburetor: Sometimes, a bogging issue is due to a dirty carburetor. Consider cleaning the carburetor or having it professionally serviced.
Adjusting the Screws:
Idle Speed Adjustment (T Screw): Adjust this screw so that the chain stops moving at idle, but the engine remains running.
High and Low-Speed Adjustments: Once you manage to loosen the high-speed screw, make small adjustments. A quarter turn can make a significant difference. Adjust the low-speed screw similarly for better performance at lower speeds.
Check the Air Filter: A dirty air filter can affect performance. Clean or replace it if necessary.
Consult the Manual: Always refer to your chainsaw's manual for specific instructions and safety precautions.
Professional Help: If you're unsure or the issue persists, it might be best to seek professional help.
Remember, safety is paramount when dealing with chainsaws. Ensure you're taking all necessary precautions and understand the adjustments before attempting them. If in doubt, professional servicing is always a safe option.
I hope this helps.
Craig
@@TheRepairSpecialist Thanks for the detailed reply Craig, I will start with a little WD40, both the high a low are stuck firm. The idle speed seems ok as the chain is not creeping, strangely I'm able to turn this screw ok. I keep the air filter cleaned regularly, it's the minute plastic mesh type so I do wash it out and dry it.
I will give your guidance a try out today to see if I can fix the annoying bog down. Thanks
@@TheRepairSpecialistthe high and low screws are a specialist tool, they are definitely not slotted screw heads.
Gold
Thank you 👍👍👍
This is good
Thank you 👍
Sumtine you cant tune it bog stay
Im not sure what you are saying.