cutforfun
Addicted to ArboristSite
When you put the wt215 carb on the ms170 I do believe you need to modifiy the impulse port on the carb. Did the dealer get your saw going since the jokers could not.
Need help with MS 170
- Thread starter Quickhorse
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M
moody
Guest
I'm not a big Stihl guy most of what I work on are Husqvarna products. But I did know those impulse lines are different. Easiest thing to do is use the 170 boot in this case. Maybe one of these fellas has a picture they could show you how to fix the issue.
Quickhorse
ArboristSite Lurker
Where do I modify the impulse at? That is actually what they said was wrong . . .
Fish
Tree Freak
The guys that told you that it was an easy swap, need to tell you how to fix this easy, I don't see an easy way out.
Quickhorse
ArboristSite Lurker
Anyone know what this involves or should I just stick the old carb back on? I have a lift in my poll barn so I am not new to working/modifying things if you get my drift. I just don't want to do things twice if I can help it. So if anyone has a video or pictures as to how to make the full carb swap on an MS170 I would appreciate it . . . or if anyone wants to buy this saw from me and fix it to their liking then make me an offer.
Fish
Tree Freak
The impulse port on the ms170/ms180 carb is at 6 o'clock, The MS250 impulse port is at 7 o'clock.
No easy fix.
View attachment 294114
No easy fix.
View attachment 294114
cutforfun
Addicted to ArboristSite
Drill it out at 6 o'clock where there is already a blocked of port .
Fish
Tree Freak
cool, so the passage is right below? Does he need to plug the other one?
cutforfun
Addicted to ArboristSite
It should get sealed up when the carb is installed , look at 08f150 cry baby thread
(something about bringing tears to is eyes) he started yesterday, he just did it and posted good pics
(something about bringing tears to is eyes) he started yesterday, he just did it and posted good pics
TermiteBuffet
ArboristSite Guru
I just did one of these the other week ,tried it on a MS 170 and a MS 180 the part # for the carb I used was 1123-120-0605-A which says WT 215 on the Stihl box , the 6 o'clock port was plugged with a brass plug that came out easily with a sheetrock screw and it lined up fine with the pulse port on the intake block. Sorry about coming in on tail end of this. Termite
Fish
Tree Freak
Just curious, the ms170/180 boot lip is pretty thin
cutforfun
Addicted to ArboristSite
Went back and read a bit more, looks like u need to block or fill the original hole.
TermiteBuffet
ArboristSite Guru
I didn't plug the other one , the rubber intake covered it nicely. But the one at 7 o'clock wasn't oval like his? So it might be worth plugging Termite
Quickhorse
ArboristSite Lurker
It should get sealed up when the carb is installed , look at 08f150 cry baby thread
What do I keep the 170 intake boot on there still? Do I need to use the 250 gasket over top of it? Thanks for clarifying the modification.
TermiteBuffet
ArboristSite Guru
Yes use the 170 intake boot the only thing I changed was the carb , and a slight tweak of the throttle rod . Termite
qbilder
ArboristSite Guru
No biggie. I can see you're frustrated. Hoping you get it all figured out. My 170 is one of my favorite saws, gets used more than any other. Please keep us updated on how the troubleshooting goes and if you can successfully swap those carbs.
Fish
Tree Freak
The choke rod is visually different, and modifying there?
TermiteBuffet
ArboristSite Guru
I don't think their was anything major if any at all , I just went out and took the wt215 off of my 180 just to double check, would a installed pic help? Or a pic of the choke rod?
Fish
Tree Freak
Sure, not for me, but the op.
The one choke rod is visably different, as well as the throttle rod.
The one choke rod is visably different, as well as the throttle rod.
TermiteBuffet
ArboristSite Guru
From which saw to which saw Fish , a 250 to 170 - 180 ?
