Blew Up the Neo Tec 843, Husq 543xp clone, One of those days!!!!

[@AndyH-13]

At the end of your videos it’s usually ‘Dubb’s Out’ but today it’s ‘Dubb’s and the Wrist Pin Retainer Spacers Out’. Enjoyed the video.

[@dubbssawshop]

You ain't kidding there, I'm just glad it happened on video luckily. This actually happened 2 times, I think I say it in the video, so I'm going to whip up another video about the first time lol, we will call that one False Hope LOL

[@sunbear1973]

Sorry to see that happen, But on the other side everyone loves to see the carnage. 😉 Thank you for sharing.

[@dubbssawshop]

True that!!!! Good note is now we know ow what the complete inside looks like. 👍🏻

[@darrelljohnson4658]

Good class thanks for your help

[@jamiewykes8585]

Oh man , sorry to see that. Thanks for sharing the good and the bad. Makes me want to find an oem set of thrust washers for mine.

[@dubbssawshop]

Yes no doubt, I think it would be good for the longevity of the saw any, I'm sure someone has them for sale. But crap happens sometimes, gotta take the good with the bad.

[@CharlesBrisco]

Stuff happens ill dig out my oem cases an get them headed yor way

[@dubbssawshop]

Man you are awesome, we will for sure rebuild back stronger than before. 👍🏻 I appreciate it!!!

[@FabAcres-Blackcat]

Pretty much all of them do it eventually. Been through 3. First one was used, second was new, 3rd was warrantied from the second. I think that’s why they were dumping em all for like $140 right now. The last one would squeak like crazy till it finally exploded. If you look at the piston they usually show a shit ton of wear where the washers runs. Like it just mushes the aluminum till it binds up and one of the washers explodes. Both of my oem ones have been good even after porting tho.

[@jamiewykes8585]

Wow, you have lots of first-hand experience with this issue. Is thrust loading like you see in the Neotecs normal in that area? I wonder, are the Neotecs having higher thrust loads or are the washers just poor metal quality? Maybe the surface finishes on the piston/thrust washer interface aren't good? Thanks for sharing

[@FabAcres-Blackcat]

@@jamiewykes8585 the quality/ fit/ function of at least the engine hard parts really don’t look much different from oem. Like every neotec cylinder had the same numbers as the older style 543 (mines a 2016) and the finish/ chamfers looked just as good. Same with the piston minus the clips. The newer version of the 543 (mine is a 2019) had a little lower exhaust but they also have a different carb, filter, random brackets etc. if anything is say the neotec washers are too hard and or not heat treated the same since they literally shatter like glass.

[@jamiewykes8585]

Thanks! I wonder if there is also a clearance issue. Has anyone ever compared the thickness of these washers vs oem?

[@bennyblanko3]

Bummer! That was a fun video though. I think the metal on the china clone saws is a little softer. I mean, echo has those little spacers too, and they never break. Charles real 543 just blew up too, so don't feel too bad. He just got another neo though, to port.

[@IndianaDoug]

I think you’re confused Benny. Brisco blew his 492 up not his 543.

[@CharlesBrisco]

My oem an the neotec are both fine my 492 shindaiwa blew up I have a parts 543xp I bout a wile back that I'm gona hook dubbs up with parts to fix his

[@bennyblanko3]

I'm so sorry everyone! I was wrong. Wrong saw ... Charles 543 is not blown up. Just watched an update, and I mistakenly started something that isn't true. So sorry ... and I stand corrected. Thanks everyone for being understanding of my poor broken brain ... heh heh ...

[@IndianaDoug]

@@bennyblanko3 no worries, it happens lol, there were a couple other thinking this as well.

[@brennancass3747]

That isn't the first one of those that's happened to. Still sucks nonetheless, happened to me twice on a stihl recently. Your cases look good compared to mine😆

[@dubbssawshop]

I guess it happens, we can control what we can and the rest is up to the saw gods!!! But we can rebuild and try it again. 👍🏻 and yea I herd they caused a few failures here and there. I got a hot lead on a set of oem cases tho 😃

[@ArkansasChainsaw]

i have the 846 it is a ms 250 clone has muffler mod last ran and check was 14800 rpm beast of a small size saw

[@lisayoho7690]

Those thrust washers are know for that in the Neo Tec that’s why mr brisco used the OEM ones

[@dubbssawshop]

I wonder what the difference is? If one is harder than the other, or I'm sure it's 2 different grades of steel also.

[@bennyblanko3]

@@dubbssawshop Charls ported 543 just blew up too ... I think I'll just stay with the muffler mod and not port mine, and keep the rpm's down ... heh heh.

[@dubbssawshop]

@bennyblanko3 ohh no!!!!

[@CharlesBrisco]

​@@bennyblanko3my 543xp an Doug's neotec are just fine I blew up the 492 shindaiwa

[@ozdatman]

It sounded like the ignition was breaking down slightly.

[@dubbssawshop]

Yea something is def off with it, idk if it's ignition or carb. Carb tuning is bit wonky too for sure.

[@jamiewykes8585]

@@dubbssawshop mine does that too. I might swap the coil with my Redmax to see if that is the cause. I already tried the easy swap; spark plug wasn't it.

[@dubbssawshop]

@@jamiewykes8585 I think it's the carb. I put a walbro HD carb kit in and tuned the carb and all the crazy popping stopped.

[@jamiewykes8585]

@@dubbssawshop that makes sense! Charles didn't have the popping on Doug's Neotec, but he was running his oem husky carb on it. So you're saying putting a walbro rebuild kit into the Neotec carb was the fix for yours? That is good, those oem husky carbs are big $

[@jamiewykes8585]

@@dubbssawshop which HD carb kit did you end up using? Did you go beyond replacing just gaskets and diaphragms? thanks

[@frankz1125]

Ouch. She was running pretty good. You plan to fix it?

[@dubbssawshop]

Yea. I hope to come up with the parts. If not I'm getting a new one and will throw the cylinder on that.

[@frankz1125]

@@dubbssawshop nice.

[@161Sheriff]

Little JB weld and send it….😂

[@dubbssawshop]

I may try that no doubt. Clean the crap out of it and it may take. Only has hold like 5-7psi if that.

[@161Sheriff]

@@dubbssawshop 👍

[@Hambonebodi]

Are those thrust washers metal ? Did you ever find out why they failed?

[@dubbssawshop]

Yes they are metal, they are spacers, the piston is way wider than the crank end, so these take up the slop. I've herd they were heat treated and got to brittle, I do believe they have fixed the issue with them tho. My new one is still rocking. OEM are also available from Husq for the 543xp.

[@Hambonebodi]

@@dubbssawshop I just bought a 843 , it runs plenty strong for me as a work saw I was just going to leave that one alone, I love the saw , i was thinking about buying another , a 543 XP pop up piston , OEM thrust washers and a OEM wrist pin bearing, port it a little , put on a walbro carb and make a pipe for it just to play around with , i don't know about the pop up piston as the one I have seems to have good compression , I don't want to be stuck to using 120 octane race fuel , I want more power though lol 🤣🤣🤣 , I bought the saw because of your vids even after I saw you blew it up a few times lol , love the vids , keep em making shavings .

[@dubbssawshop]

@@Hambonebodi the pop ups def give it a good little bump in compression. You can still run regular gas too 👍🏻 im running a pop up in one of mine and regular pistons in the others. Neo Tec sells those carbs now and they work very well. The oem cylinder is like $50/$60 ish. There is also a AM P&C kit available.

[@dubbssawshop]

@@Hambonebodi I appreciate you watching a d glad I can offer some advice on these. They are great little and powerful saws for 43cc

[@yungsmile7546]

Look everbuddy, I kinn blow up a ported $160 Chinese chainsaw runnin' at 14,000 rpm. Really???🤣🤣🤣

[@dubbssawshop]

@@yungsmile7546 not sure what your intentions were, but if ya don't like it don't watch it!! I've blew up a few saws in my day, and will blow up more. Heck just a week ago I popped a Jonsered turning about 15.5K rpm. Rebuilt it and keep on getting it. 👍🏻 love ya too buddy.

[@Doc-Cole_Trickle-of-Chainsaws]

👍🆙D

[@dubbssawshop]

She failed me.....NOOOOOOO!!!! Hey chit happens.

[@Doc-Cole_Trickle-of-Chainsaws]

​@@dubbssawshopat least it's fairly easy 2 replace, no major loss!

[@dubbssawshop]

@darinritter8392 you got that right. Whole saw is only like $179.99 on fleabay

[@Doc-Cole_Trickle-of-Chainsaws]

@@dubbssawshop fleabay😁, there's your dinner!

[@dubbssawshop]

@darinritter8392 heck!!!! They are $139.99 on Jungle Zon