Great explanation. Honestly I never realized there was a 2mm allen head in there. I've always drilled them out. Yes, those pins are hardened, and occasionally the bit will drift. Going forward I'll be doing it your way. Much cleaner. Thanks Brennan.
Brennan, Thank you for this valuable information. Your kindness is much appreciated. I aligned each little groove with its corresponding limiting ball as you suggested, marked the center of each ball with an automatic center punch and using a 3/32in drill bit carefully drilled them out. It's difficult to see how the manufacturer gained an advantage by altering the carburetor in this way as the internals were caked with dirt.
Excellent process for making this carb fully adjustable. What would be your suggestion for how many turns out on each adjustment screw to get started with. One turn on each????
Thanks , I was thinking how to remove the limiters without distorying the adjustment mechanism. Just rebuild a 251 , new cylinder and piston and it runs lean on the high side. The original piston had a hole burned in it because of the lean condition. No crankcase leaks.
I think I broke the plastic sleeve in a way that the cap can still stay on but it just spins, doesn't actually turn the screw anymore. I can still use the allen head. may see if I can find a fix so I can use a flat blade screw driver.(cap just spins now) but it gives a guide for the 2mm allen, so its not a terrible issue. so thanks! it came out, and pins knocked out easy.
This video explains the problem, which is not the caps, but the pins. I found any attempts to hold the carb in a vise, were sketchy. Instead of driving that hardened steel pin all the way thru, I used a smal stone on a Dremel, and ground of the tiny tit. The needles with limiters now function fully. Canned air to clean and re-assemble.
This method will still make the cap useless i did this to me ms291 and using the screwdriver it will only adjust it clockwise it skips when you try to turn it counterclockwise
I just drilled my ms271 carb plugs out today with a 5/32" bit, it drills easy its just aluminum, i adjusted it better than when i bought it new, my low idle was too lean ...
This is by far the best method for gaining full adjustability on those carbs. Thanks for the stellar video
Great explanation. Honestly I never realized there was a 2mm allen head in there. I've always drilled them out. Yes, those pins are hardened, and occasionally the bit will drift. Going forward I'll be doing it your way. Much cleaner. Thanks Brennan.
Thank you for that information, it may come in handy, I have the MS271, but I have not found the need to make any adjustments beyond the limits
Great idea. That’s the best way I’ve seen so far.
Again Brennan, you the man!
Thank you for this!
Thank you Brennan. You rock. 🌲❤️🌲👊🪓
Brennan, Thank you for this valuable information. Your kindness is much appreciated. I aligned each little groove with its corresponding limiting ball as you suggested, marked the center of each ball with an automatic center punch and using a 3/32in drill bit carefully drilled them out. It's difficult to see how the manufacturer gained an advantage by altering the carburetor in this way as the internals were caked with dirt.
A wise man, giving away free knowledge.... is a good man!
Just my worthless 2¢
This is the best way to do it. TY
Excellent process for making this carb fully adjustable. What would be your suggestion for how many turns out on each adjustment screw to get started with. One turn on each????
@@cottydry I usually start at 1.5 and adjust from there.
Thanks , I was thinking how to remove the limiters without distorying the adjustment mechanism. Just rebuild a 251 , new cylinder and piston and it runs lean on the high side. The original piston had a hole burned in it because of the lean condition. No crankcase leaks.
Una pregunta por se trava el ahogador de motosierra STIHL ms 291 yno funsiona se aselera todo
Does this also apply for the stihl ms211, if not is there a video on how to do it on that one? Thank you
Got your saw to start smoking. My plug too clean worries me.
Good info Brennan
Thank you for this video
When I tried to back out the adjuster like you showed, it ended up breaking the plastic piece that you showed in the beginning of the video. Any tips?
Good to know even though I don't have any of those models.
I think I broke the plastic sleeve in a way that the cap can still stay on but it just spins, doesn't actually turn the screw anymore. I can still use the allen head. may see if I can find a fix so I can use a flat blade screw driver.(cap just spins now) but it gives a guide for the 2mm allen, so its not a terrible issue. so thanks! it came out, and pins knocked out easy.
I ground a slot through the pin with zip wheel on the one i did. Didnt know about the allen trick.
Great tip. Thanks.
That is ridiculous how they made those so hard to adjust.
This video explains the problem, which is not the caps, but the pins. I found any attempts to hold the carb in a vise, were sketchy. Instead of driving that hardened steel pin all the way thru, I used a smal stone on a Dremel, and ground of the tiny tit. The needles with limiters now function fully. Canned air to clean and re-assemble.
This method will still make the cap useless i did this to me ms291 and using the screwdriver it will only adjust it clockwise it skips when you try to turn it counterclockwise
Tnx man !
I just drilled my ms271 carb plugs out today with a 5/32" bit, it drills easy its just aluminum, i adjusted it better than when i bought it new, my low idle was too lean ...