husqvarna 240e running very high revs

[spudulike]

I have one of the saws all back together but it will not start i have got a good spark and compression is about 150psi after 5 pulls of the pull cord but there is a very strong smell of petrol after the 5 pulls i also have the choke out at the same time but still a non starter ? Confused

 

Sounds like the saw has flooded, take the plug out, turn the ignition off, turn the saw uside down and pull the saw over fast - you should get lots of fuel and heavy vapour out of the plug hole.

 

Let it dry out for an hour, dry the plug - a plumbers torch or gas hob is excellent for this.

 

Reassemble and pull the saw over on fast idle but NO choke. See if the saw coughs. If it doesn't, try choke for 3-5 pulls and see if it fires - don't do it any more as you will only flood it.

 

If the saw continues to flood and not fire, I would think your needle valve is leaking and this is why the saw isn't firing!

[chrisbrooks]

If it still floods will i have to change the needle

[spudulike]

If it still floods will i have to change the needle

 

If the machine is lightly used then probably not, it may just be a bit of dirt in the seat or the metering arm set too high etc Needles have the capacity to last 10-15 years - you can remove the item and check for the wear in the form of a ridge on the rubber tip.

[chrisbrooks]

Should there be alot of air bubbles coming from carb to the purge bulb ?

[adw]

Yes you can sometimes see bubbles,the purge is just pulling fuel from the metering chamber of the carb, as long as the bulb fills at least 3/4 it should be ok, why do you ask? does it run ok?

[chrisbrooks]

after putting the saw all back together i cannot get it to fire it has new carb, bearings ,gaskets and fuel lines ,but it does want to go as it fires but only a couple of cycles of the piston very strange

[spudulike]

after putting the saw all back together i cannot get it to fire it has new carb, bearings ,gaskets and fuel lines ,but it does want to go as it fires but only a couple of cycles of the piston very strange

 

You will need to judge if it is too much or too little fuel and go from there. If it is firing, you must have a spark, I guess compression is 150+ ??? and the rest is down to the fuel system.

 

It may have simply flooded but pulling the plug, turning the ignition off and pulling the machine over upside down should tell if this is the case - fuel runs out = flood!

[Stubby]

after putting the saw all back together i cannot get it to fire it has new carb, bearings ,gaskets and fuel lines ,but it does want to go as it fires but only a couple of cycles of the piston very strange

 

At the risk of stating the obvious you are pushing the choke back in after the first " pop " ? The only other thing I can think of is timing which would mean the fly wheel has shifted . This would mean the key has sheared .