Author Topic: stihl fs55 strimmer  (Read 2244 times)

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Offline Astute Greaser

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Re: stihl fs55 strimmer
« Reply #30 on: October 25, 2018, 01:01:56 PM »
Hi
Did a new HT lead and spark cap come with the replacement coil.
Had a problem with a Cortina when lovely spark when resting on the block but slightest load when in place no spark! Of course magnetron ignition makes it even worse.
Have also had problem with the on/off switch, a slightest bounce it moved the smallest amount it was turned off. Try wrapping tape around to hold on, just to eliminate.
Don"t use Chinese plugs (their Cr*p) that comes with the service kits, always use a Bosch, NGK or even Stihl.
Personally always drain these units back into the mix bottle. That way you use the mix quicker between all your units and when you come to use, a quick shake remixes the 2 stroke.
We all sympathize with your frustration.  Await your next chapter or pictures of you destroying it! Is the Grass getting long in your garden!
 ::)

Offline mervin

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Re: stihl fs55 strimmer
« Reply #31 on: October 25, 2018, 07:42:09 PM »
Object lesson here you are not supposed to repair  these things , you are supposed to go buy a new one 
Motorcycling is not, of itself, inherently dangerous. It is, however, extremely unforgiving of inattention, ignorance, incompetence, or stupidity"

Offline joolsuk

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Re: stihl fs55 strimmer
« Reply #32 on: October 29, 2018, 08:33:45 PM »
Update:
New cheap eBay carb
New fuel lines
New cheap spark plug

(All this before read about cheap stuff)
Sort of back fired more but still will not start.
Seems to constantly make the spark plug wet.

I put on a new plug cap on the last new cheapo
coil. It sparks well on head.

Next:

Try and start using a drill turning the starter bit
(I simply can not pull the thing fast enough anymore ... And
am injuring myself.)

Then it's probably to a garden place but to ask
if they can simply swap parts out to test.
If they don't do this I will have to consider
a new coil.  Do I risk a stihl one or a cheapo is the question.

It is 50/50 whether I saw it in half or cost is irrelevant and
it will be made to go at any cost.

If it was a motorbike it so looks like timing ? Or
Coils attached to wrong plugs.

I'll 're check coil gap tomorrow. I use a business card
Wish I new the metric gap for a stihl fs55 for coil.

Will report before I start buying good stihl spares

1977 RD250D (mechanical restore)
1980 GS550E
1982 GPZ750R1 (mechanical restore)
1980 GSX250E (mechanical restore)
2000 Stihl FS55 Strimmer (mechanical restore) in progress

Offline joolsuk

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Re: stihl fs55 strimmer
« Reply #33 on: October 29, 2018, 09:03:25 PM »
Coil gap :
0.010 inch
= 0.254mm

I will also look at kill switch,  off on switch tomorrow.
Should be an exciting update ....

(And bought a spark tester (off ebay ) )
« Last Edit: October 29, 2018, 10:58:25 PM by joolsuk »
1977 RD250D (mechanical restore)
1980 GS550E
1982 GPZ750R1 (mechanical restore)
1980 GSX250E (mechanical restore)
2000 Stihl FS55 Strimmer (mechanical restore) in progress

Offline joolsuk

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Re: stihl fs55 strimmer
« Reply #34 on: October 30, 2018, 06:30:54 PM »
Today's work: - total failure.

-Switch tested to work
-Coil produces spark with switch leads off, and on.(a Chinese coil)
-Coil gap set at 0.25mm
're assembled
 >Will not start

Plug gets wet.
H and L setting at 1 1/4 out
With air filter on and off.

- additionally used a power drill with 14mm socket and it still would not run.
(Note all this with brand new carb and gaskets - a cheap one not stohl)

A few puffs at the start then nothing.

I simply don't get it.  No bike I have ever rescued has given me this much hassle.
Compression,  spark and fuel getting through.

Options? Do let me know

-Take to a garden machhinery place
-genuine stihl coil ( 30£)
-genuine  stihl carb ? (50£)
« Last Edit: October 30, 2018, 08:13:38 PM by joolsuk »
1977 RD250D (mechanical restore)
1980 GS550E
1982 GPZ750R1 (mechanical restore)
1980 GSX250E (mechanical restore)
2000 Stihl FS55 Strimmer (mechanical restore) in progress

Offline 350lc

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Re: stihl fs55 strimmer
« Reply #35 on: October 30, 2018, 11:11:25 PM »
have you checked the woodruff key it maybe worn/damaged.
rd 200dx. rd 250e
 tdr 250
RD 350 LC 1981
KR1 250
gt 125 1975
gsx 750 1981

Offline Numbskull

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Re: stihl fs55 strimmer
« Reply #36 on: October 31, 2018, 02:08:41 AM »
I'm wondering..did a crank seal blow out?

Rob
The lyf so short, the craft so longe to lerne.

Offline joolsuk

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Re: stihl fs55 strimmer
« Reply #37 on: October 31, 2018, 07:10:54 AM »
Woodruf key ? I don't recall seeing one ? Or how
one would effect engine start.
(update - one that holds the flywheel in place?) - never checked - yet

Crankseal.  The engine has not been out.
Any checks I can do prior to stripping ?

And recall the compression check stats
Compression stats :
Dry 150lb
wet 175lb

Just in case anyone else has an issue i have found a good parts diagram and source for stihl stuff
https://www.lsengineers.co.uk/garden-forestry-equipment/brushcutter-spares/stihl-brushcutter-spares/heavy-duty-brushcutter-spares/stihl-fs55-brushcutter-spares.html

« Last Edit: October 31, 2018, 11:22:47 AM by joolsuk »
1977 RD250D (mechanical restore)
1980 GS550E
1982 GPZ750R1 (mechanical restore)
1980 GSX250E (mechanical restore)
2000 Stihl FS55 Strimmer (mechanical restore) in progress

Offline joolsuk

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Re: stihl fs55 strimmer
« Reply #38 on: November 14, 2018, 09:20:52 PM »
project mothballed.
I will revisit this but its either to a good garden machine
maintenance place or I gradually renew with genuine stihl parts.
(I have not done this )

thanks for help but this will be resurrected when I have some
money to waste.

(more importantly I have scratched disk 2 of
my Victorian kitchen garden disk. Don't suppose
anyone has one I can copy ?. This clearly more
of a tragedy than the stihl 2stroke engine)
1977 RD250D (mechanical restore)
1980 GS550E
1982 GPZ750R1 (mechanical restore)
1980 GSX250E (mechanical restore)
2000 Stihl FS55 Strimmer (mechanical restore) in progress

Offline joolsuk

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Re: stihl fs55 strimmer
« Reply #39 on: December 04, 2018, 02:03:43 PM »
update :
fs55 strimmer - cleaned and stored ready for next attempts / advice

Victorian kitchen garden DVD-- managed to locate , free , disk 2 so
now have the entire series again  . All can stand down looking!
It so is the best of documentaries about gardening!

RD250D - In garage awaiting spring and next cheddar Rd club run.
Starts first kick now every time and seems to smoke far far
less than when I had points only ? (have newtronics elec system now)
Also so so much smoother power delivery.
1977 RD250D (mechanical restore)
1980 GS550E
1982 GPZ750R1 (mechanical restore)
1980 GSX250E (mechanical restore)
2000 Stihl FS55 Strimmer (mechanical restore) in progress

Offline KGR33N

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Re: stihl fs55 strimmer
« Reply #40 on: December 06, 2018, 04:51:08 PM »
Hi did you fit the newtronics yourself, if not who did you get to do it. If you did was it easy and any tips as Ive just got one for my 250 C
Regards Kerry
Yamaha RD 250 C (1976)
Yamaha RD 250 C (1976)
Kawasaki GPZ 1100 (1983)
Yamaha XJ 600 N Diversion (1995)
Ducati Hypermotard SP (2013)

Offline joolsuk

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Re: stihl fs55 strimmer
« Reply #41 on: December 06, 2018, 06:48:08 PM »
Do a search for newtronics and you will find my posts
and how to guide!
Follow those and pay attention to the pre requisite it is easy !
You will need to be proficient in setting timing using dial guages.
If you can do that you can install the system .

I am totally converted to using newtronics. a cost effective
solution .
1977 RD250D (mechanical restore)
1980 GS550E
1982 GPZ750R1 (mechanical restore)
1980 GSX250E (mechanical restore)
2000 Stihl FS55 Strimmer (mechanical restore) in progress

Offline KGR33N

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Re: stihl fs55 strimmer
« Reply #42 on: December 06, 2018, 09:05:53 PM »
Do a search for newtronics and you will find my posts
and how to guide!
Follow those and pay attention to the pre requisite it is easy !
You will need to be proficient in setting timing using dial guages.
If you can do that you can install the system .

I am totally converted to using newtronics. a cost effective
solution .

Many thanks regards kerry
Yamaha RD 250 C (1976)
Yamaha RD 250 C (1976)
Kawasaki GPZ 1100 (1983)
Yamaha XJ 600 N Diversion (1995)
Ducati Hypermotard SP (2013)

Offline joolsuk

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Re: stihl fs55 strimmer
« Reply #43 on: December 08, 2018, 04:22:42 PM »
Do read the pre requisites !

any issues  it will be solved by the experts on here.
but was best thing i dod for my rd.
1977 RD250D (mechanical restore)
1980 GS550E
1982 GPZ750R1 (mechanical restore)
1980 GSX250E (mechanical restore)
2000 Stihl FS55 Strimmer (mechanical restore) in progress