Products running Alkylate based fuel mixes

[lurkalot]

I saw the first manufacturer who started throwing out the warranty if using Alkylate based fuel mixes (e.g. Aspen). Stating their saws need a 40:1 mix.  Just wondering if there's any other manufacturers out there doing the same.  Anyone else experienced this?

[Stubby]

1 minute ago, lurkalot said:

I saw the first manufacturer who started throwing out the warranty if using Alkylate based fuel mixes (e.g. Aspen). Stating their saws need a 40:1 mix.  Just wondering if there's any other manufacturers out there doing the same.  Anyone else experienced this?

Which manufacturer ?

[lurkalot]

Sorry, that was silly of me. 

 

Cobra.   I believe it's only a couple of products in their range, the Cobra CS620-20 chainsaw being one of them.

[Stubby]

4 minutes ago, lurkalot said:

Sorry, that was silly of me. 

 

Cobra.   I believe it's only a couple of products in their range, the Cobra CS620-20 chainsaw being one of them.

Is that Chinese ?

[lurkalot]

Yes.  http://www.cobragarden.co.uk/CS620-20_Chainsaw.html

[Stubby]

2 minutes ago, lurkalot said:

Yes.  http://www.cobragarden.co.uk/CS620-20_Chainsaw.html

Ha , yes . This would be because its an " old tech " type engine . Probably a copy of an engine designed when we used " old tech " oil as well .

[Paul in the woods]

Interesting, from: https://www.gardenlines.co.uk/shop/chainsaws/cobra-cs620-20-20-inch-petrol-chainsaw

 

Cobra Technical Bulletin:

Factory tests have shown the Cobra CS620 Chainsaw's piston and cylinder are overheating and becoming damaged when used with Alkylate based fuel mixes (e.g. Aspen). This can cause the engine to fail.

This model should only be run using a 40:1 petrol/oil mixture.

You will invalidate your warranty if you use Alkylate based fuel mix with the Cobra CS620-20 petrol chainsaw.

[lurkalot]

2 minutes ago, Paul in the woods said:

Interesting, from: https://www.gardenlines.co.uk/shop/chainsaws/cobra-cs620-20-20-inch-petrol-chainsaw

 

 

 

I noticed that as well which is what reminded me to ask the question.  Ironically that site gives away a free 100ml two stroke oil, and a 5ltr can with it.

[lurkalot]

27 minutes ago, lurkalot said:

I noticed that as well which is what reminded me to ask the question.  Ironically that site gives away a free 100ml two stroke oil, and a 5ltr can with it.

Just to correct what I said.  They give away a free 100ml two stoke oil with it.  The five litre can comes included in the starter kit they supply for it, with 100ml oil.  Either way that's 50:1 not the recommended 40:1

[outonalimb]

A very good reason for not buying a Cobra chainsaw I would have thought if build quality will not allow it to run at 50:1,