stihl 441 help

[shillo]

441 m tronic cuts out immediately after throttle release and will only restart with throttle held in. ive have the carb in bits, except for the little electrical box bolted on the side presumably where the high and low screws should be. The linkages all look to be in the right place. she picks up fine and top end is good, any ideas?

[spudulike]

If you are saying the saw stalls on idle, replace the fuel solenoid. Their is an upgrade kit which includes the grey solenoid and a fine mesh fuel filter that will work.

[shillo]

Yes its very eratic at idle and stalls almost as soon as throttle is released. I did see there is a carb and ignition module upgrade for this saw, I ve got a feeling ive had a newer carb fitted ages ago under warranty but I think its an older type ignition module. I will look up the upgrade kit for the solenoid. its not a five minute job getting the carb out of this saw.... thanks spud

[shillo]

is the solenoid dependant on what ignition module you have? ive got 1138 4700 d on my module which  I cant find anywhere, l&s engineers list 1138 400 1300 ignition module for the 441.

[spudulike]

L&S are listing this part: -

Solenoid Valve for Stihl FS460 Brushcutter - 0000 120 5111 | L&S Engineers

WWW.LSENGINEERS.CO.UK

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Solenoid Valve for Stihl FS460 Brushcutter Genuine Stihl Part. OEM No. 0000 120 5111 Suitable for the Following Applications: FR460 TC-EFM, FR460 TC-EM, FS360 C-EM, FS360 C-EM Z...

 

[shillo]

thanks spud.

just out of interest what are the symptoms of a bad ignition module?

[peatff]

1 hour ago, shillo said:

thanks spud.

just out of interest what are the symptoms of a bad ignition module?

 

Usually no spark but I did have one that would run on tick over but cut out under load, I blamed the carb but after two rebuild/clean I tried a module and it cured the saw.

[spudulike]

As above. They can fail in a number of ways.....

Sometimes the heat in the coil after 20 mins use will just kill the spark and then it will come back after a bit of time just to happen again. 

Sometimes the machine just dies with no spark or sometimes they emit a spark at the very first pull and not after.

Sometimes they spark in free air but not under compression.

And I also have had a couple that will idle perfectly but the high speed spark advance has failed and the engine just dies exactly like a bad carb and did exactly as above...two rebuilds later, I fitted a new carb and exactly the same thing, swapped the coil...bingo, absolutely perfect.

I have had one or two with bad HT connections as well, in fact, if the HT circuit shorts or arcs, that can cause coil failure.

If your machine was in and it wouldn't idle, I would fit a new solenoid pretty much before anything else bar a quick inspection...plug etc.

 

[shillo]

ok I got the new ignition module and carb with new fuel solenoid from l&s engineers. fitted it all. now my issue seams to be the throttle cable. The end of the cable has a ball and a crimp, according to the instructions the crimp is meant to locate in the carb not the ball, but if I do it this way the throttle valve does not fully close. I tried locating just the ball in the carb and the throttle valve won't fully open. Videos show both ways.

 

please help before I chuck this thing in the skip!

 

Edited October 16, 2022 by shillo

[Stubby]

7 hours ago, shillo said:

ok I got the new ignition module and carb with new fuel solenoid from l&s engineers. fitted it all. now my issue seams to be the throttle cable. The end of the cable has a ball and a crimp, according to the instructions the crimp is meant to locate in the carb not the ball, but if I do it this way the throttle valve does not fully close. I tried locating just the ball in the carb and the throttle valve won't fully open. Videos show both ways.

 

please help before I chuck this thing in the skip!

 

 

Is there not a throttle stop adjustment screw ?