Stihl MS290 Big Bore

[user 122190]

I finally ordered the big bore kit (56cc -> 65cc) for the 7yo saw. Which is still running great. I just got this bug to do this.

If the nice weather holds out I might start in on this right away. Otherwise it will wait til spring. Also coming is a new carb, that I guess I will use. Only thing I might want to get is a new Intake Boot, just to be safe.

Doing the Project Husky 350 this past summer, gives me the confidence to do this. With the Husky I took a lot of short cuts (I didn't replace crank bearings, crank seals, left the carb as it was, etc.) to save time and money (it wasn't my saw, and I wasn't being paid). This project is going to be done right; everything is going to get taken apart, cleaned, inspected and if needed repaired or replaced.

 

[jltrent]

If you are using an AM cylinder and carb try to remember how you took it a part as you will be doing this again putting the OEM parts back. I have not had very good luck with AM cylinders and maybe 50% on the carbs. Look for good OEM used if you are buying.

 

[cuinrearview]

If you are using an AM cylinder and carb try to remember how you took it a part as you will be doing this again putting the OEM parts back. I have not had very good luck with AM cylinders and maybe 50% on the carbs. Look for good OEM used if you are buying.

No matter how many times he hears this, deaf ears...

 

[user 122190]

I hear just fine. Don't spaz out, if I don't follow your 'advise' exactly.

No matter how many times he hears this, deaf ears...

 

[cuinrearview]

I hear just fine. Don't spaz out, if I don't follow your 'advise' exactly.

Lol, I didnt offer any. I learned my lesson with you.

 

[user 122190]

Doubtful. You can't help yourself, and have to toss an opinion in to any cooking pot. Mental Defective?

Lol, I didnt offer any. I learned my lesson with you.

 

[cuinrearview]

Doubtful. You can't help yourself, and have to toss an opinion in to any cooking pot. Mental Defective?

Challenge accepted. I'll sit back and watch you build a Chinese special, then watch the new thread a month later when something goes wrong.

 

[user 122190]

See. Can't help yourself. Just got to get your opinion in there. Always Negative too.

I will share a little insight with you, about you -- Nobody Cares.

Challenge accepted. I'll sit back and watch you build a Chinese special, then watch the new thread a month later when something goes wrong.

 

[cuinrearview]

I will share a little insight with you, about you -- Nobody Cares.

I certainly hope you're right.

So is this a build thread or the Tim and Bill slap and tickle thread? I came here for some serious saw tech.

Let's get it ON!

 

[user 122190]

Whatever.... *** Yawn ***

https://www.arboristsite.com/community/threads/chinesium.324619/page-2#post-6673546

I certainly hope you're right.

So is this a build thread or the Tim and Bill slap and tickle thread? I came here for some serious saw tech.

Let's get it ON!

 

[cuinrearview]

So the Chinese "big bore" you ordered isn't going to work?

 

[CentaurG2]

Isn’t ms290 big bore an oxymoron. Sort of like jumbo shrimp, giant dwarf, Great Britain.

 

[Chainsaw Jim]

Here's an oxymoron....

 

[FlyingDutchman]

I'm still waiting on my Chinesium for the 290 since October 3rd. The tracking number hasn't said anything different since I placed the order. A little sad because I finally have time to work on it today.

Sure it's risky but I fleshed out the order with with the needed carb, clutch and sprocket wearables, the needed bar stud to remove the engine and other misc parts to complete a worn saw that probaby should have been parted out. look at it like a cheap fun experiment, that hopefully goes well. If not I can throw the original top end back in and track down an oem carb.

 

[user 122190]

Yeah there are lots of stories out there about the quality and longevity of these aftermarket parts. The other day, I was reading one scathing review of a similar big bore kit. "POS, the camshaft seized up in 5 minutes" LOL, the biggest critics often have limited or zero mechanical knowledge.

I did order a new intake boot for the build, from Amazon for $10 and change. For grins I looked at BaileysOnline.com for a Stihl OEM, and it was over $50. Really? OEM is 5 times more expensive, 5 times better(?), for a piece of rubber tubing.

 

[cuinrearview]

https://www.arboristsite.com/community/threads/farmertec-huztl-ms200t-intake-boot-melted.324660/

 

[K Mueller]

That’s cause baileys is a racket. You can buy new OEM boots for $10.

 

[NCPT]

I did order a new intake boot for the build, from Amazon for $10 and change. For grins I looked at BaileysOnline.com for a Stihl OEM, and it was over $50. Really? OEM is 5 times more expensive, 5 times better(?), for a piece of rubber tubing.

Yes, OEM is much better quality. I bought an aftermarket intake boot for my 025 and this is how it came out of the package. I'm lucky I noticed it. I found an OEM through another source and ordered it.

 

[cuinrearview]

 

[user 122190]

The big bore kit has arrived. Wow! Compared to the Husky 350 Kit this is flawless. Almost like it is ported. Only a little bit of roughness at the intake and the exhaust cylinder edge, which will take about a minute to smooth out. Also a broken fin at the top, but of no real importance to me. I'll dremel that flat and nobody will be wiser to its original condition.

I was out for several hours this morning on 1st day of General Hunting season opening. Looks like this is not going to be a trivial hunt this year. This kit is 2nd to filling the freezer, so it is very likely that this is going to be a spring project.

Looks like @cuinrearview will have to wait a few months before he can nit pick everything I do different then himself. Which will no doubt be everything.