At this point In the gas RC boating world we would also try going back to the stock exhaust to see if it resolves this issue. If the exhaust flow is too free flowing or the exhaust expansion is timed wrong, the engine will bog and not create enough back pressure to keep in the fuel to be combusted. This series has been my favorite and I bought a CS590 to play with because of it!

Ironhorse, you and your porting friends should wright a book on Analytical Troubleshooting for Power Saws!!! This calls for a Troubleshooting Flowchart for Power Saws!!!

Your personality is infectious! New CS590 owner here. Thanks for the videos and life lessons. Wise for under 40.

Tinman!!! Thanks for making yourself available to Buckin' so he can find his way learning to port powersaws hands on. Good luck Tinman, we both know that Buckin' really appreciates your help.

Hello from Manitoba!!! Keep us updated on the build. Awesome video! This series keeps reminding me i should beef my cs590 up lol

A rich man is definitely not always a happy man. Words to live by. Money most certainly cannot buy happiness. I gave up a lucrative management position and a large cut in pay for happiness and more time with my family. I am now a forklift technician that enjoys operating and tinkering with saws. Buckin's channel is how I found yours and I am very close to porting my 1st saw now. Thank you for what you do and all your advice!!!

These are the ones that learn ya. Great series Tinman!

that saw sounds so nice! not to loud just a perfect ring to it!

Another great video to have breakfast with. Cheers from NZ

Always good to watch and learn from a fellow Manitoban! Cheers

Thank you I increase power to my 590 and made a sleeper 620. I appreciate it

Love the shirt! Nice bogging sounds!!!❤️

Love the echo vids! I've been super pleased with my cs590. Watching your vids makes me want to port it! Muffler mod and a retune, it likes an 8 pin and a 24" skip chain pretty good but im sure it has more in it!

You'll get it figured out man, good luck!

Thank you Tinman for showing problems with saws and that stuff happens. Love this stuff and appreciate all of it. Thanks for helping us backyard saw folks. Love ya brother. 🌲❤🌲✊🪓

Tinman, when I have had this run condition issue in the past on a couple on my saws, it has been the carb. I think you are on the right track in trying a different carb.

I have been battling a Husky 345 for a while now, wasn't running right, I pulled it down, new bearings/seals, carried out vacuum/pressure test, stihl not running right, pulled it down again, resealed the cyl, made sure the intake boot was good, sealed it to the cyl, cleaned carb many times, new bits in the carb, tried different spark plugs, fuel filters, tuned carb many times etc. Finally found the problem...... fuel line had cracks in it.....

Cool channel man, I like your style. I’ve heard your name mentioned on other saw channels but some how KZfaq served up this 590 series and I clicked because I’m a shindaiwa fanboy and maybe I’m looking for clues to porting my 488… anywho, I like your honest style and the cutaway u did explaining the 590 issues was super helpful - cheers from JimBob

I had a similar problem and finally traced it to a impulse leak. Can’t wait to see where you end up.

You got everyone thinking on this one. Good work!

Sometimes a sparkplug can be defective right out of the box. I had one that was cracked inside allowing the insulator to move up and down and no, I hadn't dropped it.

L.O.L. I thought it was the coil...it was the plug! Nice job Tinman! ALOHA!🤙🏻🤙🏾😎

Check the plug boot. The spring inside can come loose. My saw is having the same issues. It will make this particular saw run all over the place. When its right its great. When its not it wont...it acts lean n wont idle. It might idle but wont take fuel n bogs out. Its now having a delayed start. You pull to start n a second or two later it fires n starts. Hope this helps.

Good video Tinman. Sometimes you get the bear, sometimes the bear gets you. Pretty frustrating sometimes but we all play withese things because we enjoy it. Thanks for your help on the MS660. It's early but seems to be a tiger so far. You will whip that Echo sooner or later.

Good info buddy! Have a great weekend! 👍👍👍👍🇺🇸🇺🇸🇺🇸🇺🇸🙏🙏🙏🙏

Great video! Thanks for sharing

Timing I have new 2013 homelite 4218c..don't laugh was my grandfather saw, that little thing rips. It's crazy muffler is mod carb tuned it's 42cc but thinking about doing some porting nothing major but your videos are great great information seriously now I understand the degree wheel and why so important when building a saw or any motor...keep it up brother..

Thanks Bro👍 I have a echo cs 590 and want to know more about it and you are awesome Dude😎

Sometimes the simplest things create the most problems. Have a good weekend buddy.

God Bless and Protect you Ironhorse!!! God Bless and Protect you Tinman!!!

I was an auto mechanic for 20 years my friend! I went almost the same path.

I can recommend Kevin aka Huskihl over on OPE and AS, and Rattler Worksaws if you're looking for saw porters to get saws from. I have a ported 254 from each of them and both are awesome. Kevin's is a bit hotter, but both rip good. Both are good people also, can't ask for better guys to deal with. I know there are a lot of good saw porters out there, those are just two I've dealt with. Keep up the great work, absolutely love your channel. Blessings brother!

Great upload, could be a classic, not what you know, but who you know. To get this sorted 👍👏👏

Hi Tinman, glad you found the first issue and hoping you can fix the current issue quickly. Good luck. I'm very curious what it is! I had a similar behaviour on a FS80 brushcutter. But there it was guiet easy: the thread of the sparkplugbore was wrecked and the plug got loose while running. But took me also a lot of time to figure that out because the plug felt right. Thanks for sharing.

Carbs can be the most frustrating part of any engine. Lots of tiny holes to catch crap in

I'm sure there are others that will work too but those to I know for sure work perfect.

IRONHORSE YOUR A WEALTH OF KNOWLEDGE MY FRIEND

TINMAN YOUR ONE HECK OF A MAN FOR HELPING OUT BUCKIN ,KUDOS TO YOU MY FRIEND HAVE A GREAT WEEKEND BUDDY BE SAFE AND TAKE ER EASY,,,, FRIDAYNIGHT SHOP TALK😁😁😁😁😁✊✊✊✊✊✊🇨🇦🇨🇦🇨🇦

Hi tinman watching your videos are like watching one of my favorite TV shows! I'm a mechanic too I work on engines small and big just a thought maybe put a tachometer on the saw see how many RPMS it is running now maybe it is bouncing off the rev limiter. But maybe it needs a different carb now. Would be interesting to see the fix for this.

I ha a strato carb do that. Put a different high jet adjusting screw in with a longer taper. It helped a lot.

Hey bud where are you at with this saw. I bought one a couple weeks ago and have bein looking for porting info. So I've bein watching your build. Love you channel BTW your one of the most honest guys I know and I appreciate and respect you for that. Anyway I have some thoughts to share on this saw cause its bein on my mind all night. Shoot me a pm if and when you get a minute. I know you must be super busy so don't sweat getting back to me immediately

I had a similar issue with a stihl 025 older carb rebuilt it with a new meter and Same issue so I pulled the metering pulse valve side back apart and re adjusted the needle and it finally cleared up. Since i did port it and open the muffler it runs dead on now. Took me a few weeks as well to figure out how to work around the issue. You can do so and just richen the low jet up. Even though you already adjusted the meter to factory specs

Great vid again..a rich condition is so rare it can stump us, thinking 🤔...

Glad to be here friend

Thanks I'm having the same problem with a 031av I'll try this

Thank you!!

Stoked to find your channel and this project! I subscribed and cant wait to see the conclusion to this series. I have this exact saw, just got lucky buying it at a good deal from a friend few years ago. As I've recently started to pay more attention to it and actually really need it to clean up our property I have become interested in how to take care of the thing better and even improve it's performance. Im excited to try some of the things you're doing here. All the best 👍🏻

Your a good man tinman.🏴󠁧󠁢󠁳󠁣󠁴󠁿

dont really know about saw's but on my montesa 315 triles bike if i have any problems with it not starting or running funny 99.99% off the time it turns out to be the plug, i've put a new one in it before and 5 minutes later had to change it again for a new one because its blowen again and wont start, i had one bike would only run for 20 odd minutes before having to change the plug then would run fine for another 20 minutes then the same thing would happen, ps you also have at least one subscriber from the scotish highlands!! love your videos Tinman!!

All the like mind individuals seem to be in Canada. I'm much to far south. Thanks friend and more please

I blocked the hole in the bottom of the main jet ( its a bypass to the low side ) with a 2 part cemical resistant stick apoxy so you could lean it out. I found this out over at OPE forums on 590 porting.

HDA191 and 199 main nozzle make it fully adjustable.

New subscriber! So far love the channel. I’ve had my Echo CS590 for a year now and love it. About to put a 24in bar and chain on it. Do you think it’ll handle it with no problems? Would like to eventually get it ported and adjusted so it can take having the bigger bar without bogging down or overheating the saw. What are your thoughts? Also, in my area, I have all hardwoods, red/white oak, walnut, hickory, ash and maple.

I had to shelf a 3120 for 2 months because I couldn’t figure out that bog. Mine was a fuel line. Been there buddy.

I'm going to guess that the coil has a rev-limithing issue, and a new plug will help, for a short time, , , when the coil get hot, the rev-limiter fails. Try using an old coil that you know works for sure, even if it's not the one you want. (Is the coil on backwards), , , spark will still be generated (sometimes), but it's not picking up the polarity from the magnets correct (N and S poles are switched relative to the coils needs), or if it's a coil from a different model saw, maybe the poles on the other saw are not the same, or maybe there is a degree timing difference as compared to the flywheel that you are using. I wish you the best.. thanks for all of your videos.

I pulled the limiter caps off of mine with needle nose pliers. I got some more movement

Had a finicky o28 beautiful little saw old boy said the damn thing never run right from new but yet you can see it had a lot of hours on it found air leak in bolt hole for mounting pulled my hair out put a good used car on it run beautiful very happy customer charged him 10 bucks

My auto shop teacher way back in 1966 told us "Carburetor is a French word that means 'LEAVE ME ALONE' "

Seems like it’s starving for fuel on the top end, then it’s catching up and pulling too much fuel then starving again etc. just my thought. I agree with the carb issue tinman good luck with this issue

Hey Tinman. I love that you show both the ups and downs to doing this stuff. Quick thought, is it possible that with the stock intake timing, the impulse signal is too strong at the diaphragm? Have you tried lowering the metering lever a tad to see if it clears up a bit? Either way, looking forward to seeing you get it dialed.

Tinnman it happens I've got brand new straight out of the box spark plugs that were bad !

Maybe ask Donny walker I'm sure he's ported a few newer echoes buddy? Just a thought

I muffler modded one of the cs590 and was surprised to not need to retune the oem carb At ALL. I muffler modded a cs 370 and it totally needed the carb readjusted but the cs590 did not.

I know my saw sounds exactly the same as that until you put some heat to it... like make 4 or 5 cuts wide open and really lean into it and make it work and she should clean right up and you'll feel the powernband come on but sometimes it takes quite a few cuts to get it to come out of it, especially if your running a little rich or rich on the oil

Just a thought. Maybe a hotter burning plug. Best of luck

After porting what are the numbers like you did when you tested upgrading only the carb and ignition? All that work and we don’t know the results?

It is a good thing you have ported a lot of saws if this was your first saw you would be pulling your hair out about now

I have definitely wrenched til 3 or 4 am before , not on saws but sleds . Lol

Curious on how big a 2 stroke can get? Like what is the "sweet spot"?

Echo saws are tuned ragged edge on a balance btwn carb size and port sizes hence big high intake ports, muffler mods will help make power due to epa reasons that’s the route echo went to appease epa emissions, changing port timing throws everything out of whack when it’s on ragged edge of performance, I recommend getting a way bigger carb hole size wise, sounds like it’s pulling excess fuel due to higher than normal vacuum from the motor, just a guess, if you want to port echos port width by a bit but not much and don’t change timing

I love night sawin

Tinman just tried a different Nozzle in my 590 carburetor and it makes a world of difference Walbro 86-578-1 bet it helps this saw out

Hey Tinman, I'm having the same issue with my 620 I'm really wondering if you can get a longer hijet needle for it? Mine's turned all the way in and still running very rich.. I tell you that thing would scream if it could just gain a few more revs! Can't wait to see what you come up with. Cheers 🍻

My buddy had a frankenstein saw..it was spitting out the exhaust...just to get by and with no idea..we put a little plastic cone from a pen inside the fuel line...instantly ran better...just my $.02

Ive seen some engines have trouble with R plugs, so maybe that had something to do with it?

Hello from Piqua Ohio.

Perhaps the timing is off. Is the woodruff key sitting in place firmly?

Texas night sawing, my biggest activity.

Hi Tinman from here in Virginia, I have a CS590 and interested if you any updates on the CS590 build? Did you find the problem. Thx Todd

HI TINMAN I seen that happen before 2 brand new sparkplug no good still white plugs won't fire at all better off 2 get plugs and throw the others a way thrash OMG 2 19 2022

The Echos are running to damn rich. All 2-strokes spit fuel back, but the echos do this in a extreme way. Fuel clogs the air filter and it drowns after a while.

Hey buddy love yas!

Does the low jet supply 75% of the fuel at WOT

Frequently in my Lil shop at 10 pm, even though I gotta be up at 3:30 am, so I can get ready, and drive 40 mins to work, have to be there @ 5am

Where do I get a 590 carburetor? Factory or do you have aftermarket sources?

Would a 28 in bar work on that saw?

Check your Ignition timing on the fly wheel possibly Advance it. And maybe a carb from a STIHL ms 361 or a ms 390,391

It's a two-stroke chainsaw turn screws on these damn things 17 years in a dealership Steel don't go to the Timber without a spare spark plug fixes countless units

A friend who had an almost new CS590 Echo had the same problamo, changed the Spark Plug, FIXED! 👍8:55 He lives in Texas, what a coinkydink!

Any word yet on what is wrong with the 590 on why it won't clean out in the cut

Now I know what Charlie Browns teachers were always saying.

Try running a husqvarna carb on it if possible. That or everyone keep changing carb. Take echo saw one and clean or open ports in carb. Worse happen it flood or it will run.

I tol you an I tol you, Iffin it ain’t broke don’t fix it! 😊

Could the fuel be a bad mixture??

❤️

A new spark plug !

I don’t like to heat cycle at idle since it fouls the hell out of the plugs, once warm I don’t like to let the saws idle for more than a minute or 2

I don't think it's a fuel delivery problem. I think it's not getting full combustion because it not starting the combustion early enough. If it gets to the point to where you can't figure it out, try cutting the keyway out alil bit to the advance direction or slot the mounting hole in the coil to where you can advance the timing by moving the coil it's self backwards against the spin direction of the motor.

You can keep rambling Tinman. We are listening. I just joined and I've learned a ton. Just got a Timberwolve and I'm somewhat intimidated by it. Can you say finicky??

Never take a hobby that you enjoy and turn it into a career, you’ll lose all the enjoyment.