560XP Hot start.

[spudulike]

Husky have now inspected and returned the saw.

 

Their report says:

 

" We have today inspected and repaired the above chainsaw that you recently sent into our workshop and our findings are as follows.

 

Upon initial inspection we removed the exhaust to find scoring on the exhaust face of the piston. The cylinder has suffered in the same manor, We removed the crank seals to check the saws main engine bearings and these were all OK. We removed the cylinder where the piston ring and circlips were all still in place, we also checked the saws fuel lines and carb and these were Ok also.

 

We drained the tank and noticed the oil in the fuel was not Huskvarna Oil. As we could find no mechanical fault with the saw we strongly suspect that poor quality oil has caused the saw to seize. Poor quality oils such as mineral oils do not meet the specification of these auto-tune machines which then leads to failure. We strongly recommend the use of Huskvarna XP which is a fully synthetic oil and is specially formulated for this range of saws.

 

On this occasion we have repaired the saw as a gesture of goodwill but we do stress the importance of using quality oils. As with other industries the technology and materials used in modern engines changes as does lubricant technology,which is why oils that may have been ok for older saws are not suitable for saws that are now running hotter and revving harder. "

So the blame is placed firmly on the 2 stroke mix used. This was Sthil HP which is a standard mineral oil and was sold to me by the same dealer for sue with the saw.

 

The 560Xp owners manual (P18) says:

 

For best results use Huskvarna two stotke engine oil, which is specially formulated for our air cooled 2 stroke engines.

 

Never use 2 stroke oil intended for use with water cooled engines.

 

Never use oil intended for 4 stroke engines.

 

A poor quality and/or a to high oil fuel ration may jeopardise function and decrease lifetime of catalitic converters.

 

Ratio, 1:50 with Huskvarna 2 stroke oil

 

1:33 with oils class JASO FB or ISO EGB formulated for air cooled 2 stroke petrol engines.

 

Checking the spec of the Sthill oil it is JASO FB. The mix in the tank at the time was around 1.33 maybe a tad higher as I had put a bit more in to see of that aided how in ran when hot. In fairness I had been running it at 1:50 other than that.

 

Nowhere in the Husky manual does it say that using oil to JASO FB will sieze the engine in 20 service hours as has happened.

 

The supplying dealer were also not aware of any requirement for the saw to only be run on fully synthetic 2 stoke mix.

 

So while the job has been sorted I do feel that there is a whitewash going on.

 

Any thoughts.

 

A

 

Sounds very much the same as a report I had in on a saw for repair, this one wasn't repaired on warranty but pointed to the fuel mix.

I have no idea why they pull the seals, they did it on this saw and smacks of "we will pull the seals so we don't have to do a leak down test" to me - I had to spend out on over £20 worth of seals to get it serviceable again:thumbdown:

[mendiplogs]

Sounds very much the same as a report I had in on a saw for repair, this one wasn't repaired on warranty but pointed to the fuel mix.

I have no idea why they pull the seals, they did it on this saw and smacks of "we will pull the seals so we don't have to do a leak down test" to me - I had to spend out on over £20 worth of seals to get it serviceable again:thumbdown:

 

Hi Steve can tell me mate are husky saying then just use there husky 2 stoke oil as I'm running steve just Stihl green stuff mate if 560 I would not like husky to back out of not fixing it so is it best to use husky 2 stoke then if it mixed to there spec then you ok or just use ASPEN IN A 560 thanks Jon