Stihl ms250 carb limiter cap removal

[SaltyTimber]

I recently had problems with my ms250 bogging down at full throttle. In an effort to diagnose the problem I put a tach on it. At full throttle and no load it was around 14500 rpm. I figured this may be the problem so I tried to make the saw run a bit more rich... turns out the carb screw is turned as far in the counterclockwise direction as it can go. Essentially no way for me to reduce the rpm. So I assume I will need to remove the screw limiting cap or tab... whatever this saw has. Can anyone help walk through this? Thanks!

 

[Efisher26]

Some just use a screw and pull them right off, I used a small flat head. By when u pull them off you may need a special tool to adjust or it may just be a small flathead


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[cus_deluxe]

Yep i usually use a coarse thread drywall screw, i like to grind just a little bit off the end, helps it grab sooner. Just thread it in a bit and use a pair of pliers to pull it off. Beware of usi g the threads of the drywall screw to pull the limiter (ie threading the screw in until the limiter is pulled off, i have broken a carb jet doing it that way)

 

[SaltyTimber]

Thanks for the info. Does anyone have any pics or a video? Don't want to ruin it but obviously the factory setting is no good.

 

[SaltyTimber]

So here's what I'm looking at... not sure what needs to be removed.

 

[Efisher26]

The limiters are in the rubber in the top right corner of pic. Remove carb and see the plastic limiters


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[SaltyTimber]

Oh ok. That's making more sense. So could I just pull that whole rubber component off and adjust the high and then put it back on?

 

[Efisher26]

It should come off


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[HarleyT]

Yeah, just pull them off with pliers, those guys were talking about the limiters on the MS290 series saw.

 

[SaltyTimber]

Alright. So if I'm understanding correctly, the 250 doesn't have the fixed limiters. So with the rubber cap on, I'm limited to the 3/4 turn on the high. But, I can take the rubber covers off, adjust the card more than the 3/4 turn then just put the rubber cap back on?

 

[Khntr85]

These don't have the limiters you use a drywall screw with, get some pliers and pull the plastic piece off....once it's off you have full adjustability....I have pulled many of these off...

 

[Khntr85]

you can pull the black cap off, or grind the "stop" off....either way works...

 

[Khntr85]

Here you go.......

 

[SaltyTimber]

Perfect. Thank you!

 

[Khntr85]

Yes sir, no problem.....you should do a little muffler modification whiles you are messing with her...it will wake her up some....ou will have to open up the H screw just a hair...

 

[SaltyTimber]

Is there any benefit to grinding the stop and replacing the cap vs simply leaving it off?

 

[Khntr85]

Not necessarily, I have never had one come "out" of adjustment by pulling the whole thing off....however if it would give you a piece of mine know it's there, just leave it.....you can easily shave it off with a utility knife, then put it right back on!!!

 

[HarleyT]

These don't have the limiters you use a drywall screw with, get some pliers and pull the plastic piece off....once it's off you have full adjustability....I have pulled many of these off...

I wish I had said that!!

 

[Khntr85]

I wish I had said that!!

Hello Harley, you are usually always first to post good pictures and information!!!!

I just happen to have the ipl saved on my phone because I needed it so much in the past...I have done so many of the ms250 now I know we're every part goes LOL!!!

 

[SaltyTimber]

All makes sense now. Thank you for the help!