Stihl MS170 chainsaw problem

[weirdfish]

Just stripped it again after a light workout and this seems to be the sort of stuff that’s causing the problem, it’s all in the carb as well

 

[Gecko]

Sure looks like the air filter isn't doing its job.
I know the MS170 is built to a price, but the air filter pad really looks like a weak spot.

Apparently the 171 and 181 use a flock filter similar to the bigger saws.

 

[weirdfish]

Sure looks like the air filter isn't doing its job.
I know the MS170 is built to a price, but the air filter pad really looks like a weak spot.

Apparently the 171 and 181 use a flock filter similar to the bigger saws.

Totally agree with regard to the air filter, just not stopping the fine stuff going into the carb.
Might try buying a genuine filter to see if that helps.
Other than that it means a good clean after use to keep it ticking over nicely, and I’m getting pretty good at it now

 

[V8Druid]

Totally agree with regard to the air filter, just not stopping the fine stuff going into the carb.
Might try buying a genuine filter to see if that helps.
Other than that it means a good clean after use to keep it ticking over nicely, and I’m getting pretty good at it now

know that feeling well -- but usually mid use with that bloody gauze that keeps blocking in my 028

 

[Monkeybusiness]

So, it lasted longer than before but ended up full of very fine dust again resulting in bogging down under load.
Stripped cleaned and running as it should.
Surely it shouldn’t block up this quick?
Am I missing something from the air filter area that’s allowing all the dust in?
Should there be 2 parts to the filter?

I think you might have the wrong filter looking at the witness marks on the fabric - LS Engineers show 2 different versions, and they are only very cheap. I’d personally buy both and see which fits best.

 

[weirdfish]

I think you might have the wrong filter looking at the witness marks on the fabric - LS Engineers show 2 different versions, and they are only very cheap. I’d personally buy both and see which fits best.
View attachment 65930

 

[weirdfish]

Just ordered from L&S I’ll let you know the results.

 

[weirdfish]

New genuine filter arrived today and straight away I can see a difference.
Just waiting for the new oil pump and then I can see if it’s a keeper or not.

 

[doobin]

Just waiting for the new oil pump and then I can see if it’s a keeper or not.

Let me help you with that.

It’s a dog of a saw. The vibes are horrible and they eat oil pumps for fun!

You will really notice less vibes on a 135

 

[weirdfish]

Let me help you with that.

It’s a dog of a saw. The vibes are horrible and they eat oil pumps for fun!

You will really notice less vibes on a 135

I actually find it ok when it’s running right, light enough to handle and the chain is big enough for my needs.
Recently though I could launch it down the field
But I’ll try it after I put it back together before deciding whether to get rid.

 

[weirdfish]

Just thought I’d see how much difference there is between a genuine and aftermarket filter.

 

[William127]

Have to say I've always had good experiences with 170s. Had 4 or 5 over the years, still got 2, 1 bought second hand and still going strong. Fine little things for small jobs, chipper saw, hedging, fencing etc.
Been basically retired by my battery makita now, but still take one out as a backup if I know I don't need a big saw.

Small huskys I've had no luck with-
First one seized and dealer claimed it had been run on neat petrol, it really hadn't.
Second one the oil pump packed up, sat on the shelf for 3 years and then got nicked
3rd one is fine but takes an age to start, been the same from new. Not ideal for a chipper/hedging saw.
No wonder I love the battery makita