Stihl 025 + Aspen

[dggriff]

Hi folks

 

I thought I'd try some Aspen in my reliable old 025 the last time I used it about a month ago. It worked fine although didn't idle well until it warmed up.

 

Today it started straight away but wouldn't idle and after cutting out a few times it then wouldn't start again. I didn't have time to start looking into it so just finished the job off with a hand saw.

 

I've had the saw from new, must be 25 years, and it's only had non-professional personal use.

 

Any ideas before I start taking it apart or ordering new diaphrams etc?

 

Thanks in advance for any pointers.

 

Dave

[geoff]

Most likely you will need a car rubber kit, but it will be worth it, it's a small inconvenience that would have shown up soon caused by ethanol degrading the parts from pump fuel.

you might try a 1/4 turn richer on the L screw, and raise the tick over setting screw a touch, but if that fails it's new rubbers.

[geoff]

Sorry for my auto correct messing up my words.

[Luckyeleven]

I was under the impression that it wasn't a good Idea to run aspen on older machines, either run aspen from new or start with it and swap for mix after run-in. The reason being all the years of grime built up from lower standard fuel would be cleaned out and pushed through the carb in one big hit.

[spudulike]

You will typically get hardening of the fuel line and leaks around the grommet part where it seals in to the tank. The diaphragms will also harden and is more down to the damage caused by the standard fuel and its absence now you are on Aspen.

 

I have had one or two issues converting older machines and would personally give the carb a good clean out, fit new diaphragms/gaskets, fuel line and filter and that will probably do it.

 

If this fails then either an ultrasonic cleaner on the carb or new one - Do NOT overlook the fact that something else may have failed and is really causing the issue!

[GardenKit]

Good comments from Geoff and Spud, follow their advice. But be reassured that Aspen does not clean out years of crud. It contains no solvents, so will not wash out accumulated crap which will need manually cleaning. What will happen though, is that over time, carbon deposits in the upper cylinder and exhaust will dissapear once they are not being topped up by the carbon in pump fuel, but the rate of cleansing will be slow and cleansed material will pass harmlessly out of the exhaust.

[Luckyeleven]

I stand corrected

[dggriff]

Thanks for the help all. I've had a look today and there's a spark and fuel getting to the pot but it still won't start so the next step will be to get a diaphragm kit.

Cheers

Dave

[Eddie@aspen]

Hi folks

 

I thought I'd try some Aspen in my reliable old 025 the last time I used it about a month ago. It worked fine although didn't idle well until it warmed up.

 

Today it started straight away but wouldn't idle and after cutting out a few times it then wouldn't start again. I didn't have time to start looking into it so just finished the job off with a hand saw.

 

I've had the saw from new, must be 25 years, and it's only had non-professional personal use.

 

Any ideas before I start taking it apart or ordering new diaphrams etc?

 

Thanks in advance for any pointers.

 

Dave

Hi dggriff,

 

The other guys have coved it very well and Barrie is spot on!

 

If you have any questions or need more help please contact me on

 

07568108953 or email [email protected]

 

Please let us know how you get on.

 

Kind regards Eddie.

[kev_s]

if its getting spark and fuel it may be worth checking compression (although the amount of spark and fuel may still be the problem).