Trying to get an old 60's Stihl 08S working

[Huskyswinger]

Hi.

 

I've recently inherited an old Stihl 08S which was a non-runner but has spark, compression but wasnt getting fuel so took carb apart and replaced the diaphragms and gaskets as the old ones were manky and hard but still cant get it to run.

 

It starts and just about idles with the throttle locked to half position but wont rev and just dies when the throttle is taken off lock.

I've tried adjusting the mixture with it ticking over but nothing helps.

 

Just wondering if you had any idea on what might possibly be wrong?

The carb is clean as is the fuel pickup filter and air filter.

 

Any help would be appreciated.

 

Thanks,

Richy.

[Rich2484]

Are you sure the carb is clean?

 

Did you take the meter arm out and give that a blast and is it set correctly?

 

Seems you are lacking fuel. The plug should be nice and wet when trying to start.

[Huskyswinger]

Hi, what exactly is the meter arm?

[Rich2484]

Hi, what exactly is the meter arm?

 

It's on the bench thread.

 

It the meter arm and valve that allows the flow of fuel around the carb. If this becomes blocked it will not allow fuel to flow or if the hieght is wrong it will not allow enough fuel to get through. Or too much fuel.

 

Something like below.

[Huskyswinger]

Aah yeah i took that all out and blasted everything with the airline. I stripped the carb down as far as I could and got in every nook and cranny.

[Rich2484]

Sounds like you need to fault find.

 

Is the fuel line cracked? Is the impulse line ok. Is the spark nice and strong. Is the throttle linkage working right?

[Huskyswinger]

Got a beast of a spark, definitely no worries there, linkages on the carb are all ok.

Fuel line seems to be ok but I guess could be worth replacing as a matter of course?

[mixedangased]

if you need any bits for that saw let me know i have loads

[Huskyswinger]

if you need any bits for that saw let me know i have loads

 

Ok thanks!

Will keep that in mind!

[Eddy_t]

Make sure the L & H are one turn out, the carb is reassembled correctly, ht lead is through the right hole (if it's not, it can strain it and the spark will earth), check the engine timing, as this can be out if it's the earlier electronic ignition and also if it's points!

 

 

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