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Author Topic: Adjusting an MS260  (Read 999 times)

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Offline DLMaine01

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Adjusting an MS260
« on: August 27, 2018, 10:38:53 AM »
I am having trouble adjusting the carb on my 260. I replaced the carburetor with an aftermarket one. It starts on choke fine and will idle ok but will not spool up enough to turn the chain much. I put the carb to factory settings but any other adjustments I do does not seem to help much. I replaced the carb due to age and general lower performance issues. It is a cheap aftermarket carb but I know some others that have worked just fine.
Any advice appreciated! 

Offline DelawhereJoe

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Re: Adjusting an MS260
« Reply #1 on: August 27, 2018, 11:22:42 AM »
Did you replace the fuel lines, there could be a crack in it and that crack is sucking in air.
WD-40, DUCT TAPE, 024, 026, 362c-m, 041, homelite xl, JD 2510

Offline DLMaine01

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Re: Adjusting an MS260
« Reply #2 on: August 27, 2018, 12:21:45 PM »
Yes, replaced fuel line with a genuine Stihl one and the impulse line as well.

Offline Woodcutter_Mo

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Re: Adjusting an MS260
« Reply #3 on: August 28, 2018, 03:53:54 PM »
 I used a cheap aftermarket carb on my 024 which worked good for a while then started acting up. I opened up the carb and found some fine metal dust inside, I assume from the manufacturing process, that I believe to be the issue. Maybe open it up and see. 
- WoodMizer LT25, Kohler, all manual, old "drag" style WoodMizer sharpener, cat claw single  setter
- Husqvarna 372XP X-Torque/24" bar, 455 Rancher X-Torque/20" bar, 550XP/20" bar, Stihl 024AV/18" Oregon speedcut
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Offline millwright

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Re: Adjusting an MS260
« Reply #4 on: August 28, 2018, 06:35:46 PM »
Also make sure the muffler screen is open, if it is plugged it will idle but not rev up.

Offline DLMaine01

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Re: Adjusting an MS260
« Reply #5 on: August 31, 2018, 03:20:27 PM »
Thanks for the replies. I did check the muffler screen as I had read that could be a problem in some of my research. 
I was able to find a step by step for adjusting the saw which I will try this weekend. If that is a no go I will open up the carb and clean.
Thanks again.

Offline Pulphook

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Re: Adjusting an MS260
« Reply #6 on: August 31, 2018, 07:34:54 PM »
Worth the extra $$$ to refit with the Stihl carb for the 260. Aftermarket copies don't have the same tolerances; often China.
Not worth the hastle, since most of the effort is the install.
We've all been there.

Offline teakwood

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Re: Adjusting an MS260
« Reply #7 on: September 01, 2018, 08:40:35 AM »
Aftermarket carb works fine. i did two 260s with AM chinese carbs, around 12-15$. they work well.  We have members here that have used dozens of AM carbs on their rebuilds and they haven't complained 
National Stihl Timbersports Champion Costa Rica 2018

Offline Pulphook

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Re: Adjusting an MS260
« Reply #8 on: September 05, 2018, 10:49:17 AM »
I'm complaining.....2X.

Offline Mad Professor

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Re: Adjusting an MS260
« Reply #9 on: September 06, 2018, 04:36:51 PM »
Fatten up low (CCW) a bit

Offline ZeroJunk

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Re: Adjusting an MS260
« Reply #10 on: September 07, 2018, 06:31:13 AM »
Could also be that your lower performance issues weren't the carb to start with.

Offline DLMaine01

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Re: Adjusting an MS260
« Reply #11 on: September 07, 2018, 02:44:11 PM »
Success! Used the instructions I found online and it is running fine now. I bought the saw used so I never had a manual for it. Was able to cut for a bit today and all was good. I also thought the aftermarket carb was a risk, hit or miss, but this one is doing OK at the moment.
I also have a MS290 and these 2 saws make a good team.


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