2015 Ms181 Non Start - at my wits end!

[openspaceman]

On 21/07/2019 at 14:32, Darkslider said:

 

I just got the saw back earlier this week, it went in along with a non starting strimmer (Stihl fs460 - duff coil) so took a while to get it back. thought I'd better update this post even though I was sure it would have sunk to the bottom with nobody interested. How wrong I was! 

 

I didn't collect it so didn't get much info on the diagnosis rundown, but a new carb kit was fitted at the cost of £40 and it now runs as good as it ever did. 

 

Not sure how I would have pinpointed the carb as needing rebuilding myself, it was my next port of call but I'd decided I'd sunk enough time into it already and I could be doing something more worthwhile.

 

Thanks for the help all, and sorry it didn't turn out to be something exotic!

I have just has a ms181c returned to me after I fitted a new remote pump bulb some months back. It actually runs fine with me but I shall have to cut a few logs to see what the problem is after a bit of work.

 

@Darkslider Does the bulb on yours empty itself during or after use?  I just wonder if a non return valve is playing up in the bulb body as this one empties.

 

I would have thought the forward resistance in the pump non return valves should be sufficient to hold fuel in the bulb. As the diaphragm is good and the carburettor inlet valve is good the only way air can get in is from the inlet and back through a jet into the carburettor body. I can see air bubbling into the bulb through the centre as it empties.

[Darkslider]

Not sure this particular saw has a primer bulb, I'll check next time I'm in!

[Stubby]

6 minutes ago, Darkslider said:

Not sure this particular saw has a primer bulb, I'll check next time I'm in!

Mmmm .

If  it has and you have not been using it could be the problem ...?

[openspaceman]

34 minutes ago, Stubby said:

Mmmm .

If  it has and you have not been using it could be the problem ...?

Yeah

 

I'm not convinced of the utility of these bulbs and as this one is remote I shall stick a haemostat on the pipe between the carb and bulb, it should perform just like an old fashioned saw. If that's the case then the only advantage in the bulb would be in cooling the carb??

[jamallio96]

Yeah
 
I'm not convinced of the utility of these bulbs and as this one is remote I shall stick a haemostat on the pipe between the carb and bulb, it should perform just like an old fashioned saw. If that's the case then the only advantage in the bulb would be in cooling the carb??

I've found that the primer bulb is actually the only thing that solves my 560's hot starting problems - a pump or two before starting when I pick it up warm makes it start fine 99% of the time; if it gets really sulky then I've found pumping the bulb as many times as I can be arsed (like at least 30 times) then doing cold start procedure sorts it :-)

[Stubby]

22 hours ago, openspaceman said:

Yeah

 

I'm not convinced of the utility of these bulbs and as this one is remote I shall stick a haemostat on the pipe between the carb and bulb, it should perform just like an old fashioned saw. If that's the case then the only advantage in the bulb would be in cooling the carb??

I have pretty much always had Husqvarnas . When the first  pro saw came with a primer bulb ( think it was the first 50cc 346 but still with the orange side cover )  I was scathing , suggesting punctured bulbs on thorns and the like . Its never happened to me and I would not be without one now . 3 pulls from cold instead of 6 or 7 . I'm a convert ! ?

[openspaceman]

2 hours ago, Stubby said:

3 pulls from cold instead of 6 or 7 . I'm a convert ! ?

Yes there's that to be said for them

[openspaceman]

4 hours ago, jamallio96 said:

On 31/07/2019 at 21:30, openspaceman said:

Yeah
 
I'm not convinced of the utility of these bulbs and as this one is remote I shall stick a haemostat on the pipe between the carb and bulb, it should perform just like an old fashioned saw. If that's the case then the only advantage in the bulb would be in cooling the carb??

I've found that the primer bulb is actually the only thing that solves my 560's hot starting problems - a pump or two before starting when I pick it up warm makes it start fine 99% of the time; if it gets really sulky then I've found pumping the bulb as many times as I can be arsed (like at least 30 times) then doing cold start procedure sorts it ?

Yes cooling the carb should sort out vapour lock

[Darkslider]

Definitely no primer bulb anywhere on this saw!

[spudulike]

Did we ever sort the issue, so much going on and not sure if between insults, hugs, bollox and brexit that we actually got there

If we did, I suggest we talk about toilets....those German inspection ones....what are they about, best thing to do is sit backwards on them