Husky junk

[Stubby]

17 minutes ago, kram said:

 

Huskys are known to use poor quality Orings on the carbs accelerator pump. My cs340 was only a couple months old, only a few tanks through her when the carb failed. Motomix and aspen would have rotted the oring just the same.

 

 

Thats the thing though , Alkylate fuel does not attack rubber components . Pump fuel does take the coating off but keeps the rubber supple because its slowly attacking it , When people switch to an alkylate fuel and the rubber fails they automatically blame the alkylate fuel as the rubber now has no coating on it to keep it supple and has gone brittle . The alkylate fuel is only showing up what the pump fuel has been doing . Use an alkylate fuel from the get go , no problems . If changing to an alkylate fuel after prolonged  pump fuel use , change out rubber components ,

[kram]

15 minutes ago, Stubby said:

Thats the thing though , Alkylate fuel does not attack rubber components . Pump fuel does take the coating off but keeps the rubber supple because its slowly attacking it , When people switch to an alkylate fuel and the rubber fails they automatically blame the alkylate fuel as the rubber now has no coating on it to keep it supple and has gone brittle . The alkylate fuel is only showing up what the pump fuel has been doing . Use an alkylate fuel from the get go , no problems . If changing to an alkylate fuel after prolonged  pump fuel use , change out rubber components ,

I owned the saw from new and have never used alkylate fuel.

You say it does not attack rubber, that is untrue and depends entirely on which grade of rubber.

 

There are many grades of rubber and in this case Husq had used unsuitable rubbish.

Nitrile rubber can be fuel resistant, slightly less so with ethanol fuels (but there are still a great many old cars on the road!). Viton rubber is generally considered best for long term use.

 

One problem I believe to be true, there is so much low quality or fake fuel hose being produced that it can get into genuine supply chains. I assume the same is true for seals etc..

It is difficult to buy decent aftermarket fuel hose for a motorbike for example. It is suprising if a manufacturer is having issues on new kit from the factory, but does seem to be the case.

 

[topchippyles]

27 minutes ago, Stubby said:

change out rubber components ,

I should have taken this advise the night i fathered twins 🤣

[skc101fc]

2 hours ago, topchippyles said:

I should have taken this advise the night i fathered twins 🤣

....with the wife's sister. 🤣🤣

[Guo7]

Seen this happen a few times with saws that have sat a long time. Even if you drain them, the diaphragms in the carbs can dry out and go stiff, and you get lean on first start which is enough to score a cylinder. Husky or Stihl, it can happen either way. I’d be checking the carb and impulse line before writing the brand off completely.

[Stubby]

4 hours ago, kram said:

I owned the saw from new and have never used alkylate fuel.

You say it does not attack rubber, that is untrue and depends entirely on which grade of rubber.

 

There are many grades of rubber and in this case Husq had used unsuitable rubbish.

Nitrile rubber can be fuel resistant, slightly less so with ethanol fuels (but there are still a great many old cars on the road!). Viton rubber is generally considered best for long term use.

 

One problem I believe to be true, there is so much low quality or fake fuel hose being produced that it can get into genuine supply chains. I assume the same is true for seals etc..

It is difficult to buy decent aftermarket fuel hose for a motorbike for example. It is suprising if a manufacturer is having issues on new kit from the factory, but does seem to be the case.

 

The rubber be it nitrile , butile , or whatever has a coating put on it its this that  pump fuel removes , You say you have never used an alkylate fuel but you insist that it attacks rubber . How do you know this ?

[spudulike]

But both Husqvarna and Stihl use Zama and Walbro carbs so how can Husqvarna carbs be shyte and Stihl ones be superior.

In my experience, the Walbro carbs on the 357xps had accelerator pumps that failed but the infamous MS200T had Zama carbs with pump issues....I didn't purchase them 25 pcs at a time for the fun of it. Unfortunately, the 357xp was new carb time.

[Mark_Skyland]

Carb issues that I see everyday are either, pump diaphragm with pinholes, this is the thin black plastic piece under the cover that is usually held in by one large screw in the centre of the cover. Blocked strainers or more often than not dodgy one way valves/valve/check valve.  The accelerator pump is also prone to fail on a lot of the C1Q carbs. If gaskets and diaphragms don't sort it then IMO just replace the carb. Using a cheap Chinese copy can be hit and miss, Ive seen enough of them that I dont bother working on a machine if its had one fitted as you can just waste so much of your time trying to sort it out. If its a pro saw then just pay the money and buy genuine.

 

 

[Dan Maynard]

... or, I guess playing the Sherlock Holmes what if the bores were scored before being put away, but kept running as started up nice and regular? 

 

We don't actually know they were good when put away, a blower a bit down on power still blows for example.