|Stihl strimmer repair job
By browsing this site you agree to
Links to other pages on this site
|My dad gave me his two year
old Stihl FS55 strimmer for repair the other day. He was using it and it just
cut out and wouldn't restart. The symptoms immediately suggested
an ignition rather than fuel related fault. With the latter you
would expect at least some coughing and spluttering before it finally conked
In the workshop, I checked
for a spark. There was none. The
spark plug was all fine and I disconnected the on/off switch
to rule that out. Still no sparks. The
time had come to delve further into the bowels of the thing to
locate the problem. Good old Stihl's (like most
manufacturers) have held the strimmer
together with "star" or "tamper proof" bolts. Not my favourite fastener but
hey they aren't tamper proof at all and they soon came undone. The strimmer is basically all
held together by the plastic casing and the engine just connects
onto the shaft with a couple of bolts and engages with the giant speedo cable
contraption which takes the drive to the cutter head.
On inspection, the ignition coil was
found to be quite rusty which surprised me for a 2 year old
tool which has been kept in a garage when not in use.
||A quick test with
the multimeter showed that there was continuity between the low
tension terminal (which is used to switch off the engine) and
earth. Oh dear, time for a new part. These things are
sealed units and not really repairable. Armed with a
piece of cardboard on which I had written all the numbers off
the strimmer and the old coil I went to the local parts place
and they ordered a new coil which was £29 plus VAT and arrived
within a day or so. That's quite reasonable. The
last coil I bought for a Honda lawnmower was £80.
|Here's the new coil installed on the
engine. It took a little bit of fiddling about to get the
clearance between the soft iron core of the coil and the
flywheel right. After that it was just a question of rebuilding
the thing with all the dreaded plastic casings etc and routing
the wiring and throttle cable back into the correct places.
Check out the rust on the clutch
housing. Perhaps a little paint might have been a good
Needless to say the thing is now
back in action.
|It's always a bit
annoying when something goes wrong after just a couple of years.
However, it could just be bad luck and hopefully the strimmer
will be fine now. In Stihl's defence the part was a
reasonable price and quickly available.
Site last updated: