petrol strimmer help

 


Hi.

Im new here and i am in need of some help!!

I come to start my petrol strimmer today and it starts but it struggles
to tick
over. it splutters and coughs trying its hardest to stay alive
but then sadly
dies. I took the spark plug out and noticed some black
grainy residue on the
bottom and it seems to be all over the piston, is
this doomed or can i save it
from the scrap heap its only 14-15 month
old!!

It's my fault i left the petrol in it while storing it maybe thats the
cause i
dont know.

Oh its a 33cc spear and jackson brush cutter from argos.

any help truly appreciated thanks
andy.




--
andy23

 

andy23 wrote:


Sounds like the spark plug is covered in soot and needs cleaning. Just
use a wire brush or bit of emery paper to clean it off between the spark
gap. To get heavily sooted in the first place maybe you put too much oil
in the two stroke mixture?
Another thing that can happen is the spark plug ceramic cracking - that
happened to mine (different make) and gave me the same symptoms.

 


"andy23"  wrote

The piston crown should not be black and sooty, and that combined with the
erratic running...
1. sounds like it's running rich, too much petrol coming through somehow,
perhaps the choke is permanently on. Check the manual and see if there is a
mixture adjustment and weaken the mixture.
2. if it's a 2 stroke have you put too much oil in the petrol? Husqvarna do
small mixture bottles that are one bottle to 5 litres so you can't over oil
the petrol.
3. empty out the petrol tank and refill with new "petroil mixture".

--
Regards
Bob Hobden
just W. of London

 

 

On Thu, 13 Aug 2009 11:39:19 +0100, andy23 wrote:


Well it tries to run so it ain't dead! Clean the plug and try some
fresh fuel/oil mix. The soot would indicate that perhaps there is too
much oil. Engines do vary most seem to be 50:1 but my Ryobi strimmer
take 20:1 but does smoke a bit, I might try reducing it.

Also how you use the throttle might be influencial, it's an on/off
switch not really a variable control.

--
Cheers
Dave.

 


'Dave Liquorice[_2_ Wrote:

andy23 wrote:

Thank you all for your input much appreciated.

So as this maybe down to too much oil which is the 50:1 ratio, do you
think it
would be wise to run a tank with just petrol and no oil.
As i did clean the spark plug and put it back that didnt help and when
i took
the plug back out it was full of the soot again.

so would this be wise to run 1 tank full on petrol to try and i dont
know maybe
clean the piston.

sorry as you can see im not really too clued up on the engine side of
things.

thanks again ppl




--
andy23