Hey,
Wondering if anyone could help On a Stihl fs55r no spark issue. The trimmer is probably close to 15 years old I would guess. I have never had any issues besides cleaning the carburetor once and I also had to change the primer bulb just recently because the old one was split completely across the top.
A few weeks ago after finishing a day of cutting with it, I went to restart it for just a minute to get a few weeds I had missed earlier. I pulled and pulled and it didn't try to start at all. I thought maybe a spark issue was to blame because it didn't act like it wanted to start at all. The next evening I went out and tried again and nothing. At this point I tried putting a little fuel under the air filter to see if it would maybe start and quit so I could possibly have an idea if it was a carburetor issue, which it didn't really seem like. I got nothing. Compression felt like it always did.
At that point I took the spark plug out and grounded it to the engine and saw no spark while pulling on the starter rope. I then tried another new spark plug and got the same result. I then tried to reset the air gap on the ignition coil with a business card just in case it had somehow moved a little. That is the way I have done it on mowers in the past. I was told way back when I was a kid that was a good quick way to gap a coil. Still got nothing.
So where I am at now is, I have worked on vehicles and other small equipment both, but fortunately I have never had many issues with weed eaters. I am wondering if the coil is bad and if I tested it correctly? Not dealing with weed eaters much, it has me second guessing myself if I tested it correctly. It has two wires on it and I unplugged one at a time to rule out the on-off switch as maybe being the issue. I have had a few times in the past where I turned it to off but the weed eater stayed running. It hasn't happened in a few years though. Was I on the right path in testing it like that? I am not sure which wire needed to be unplugged. I am thinking the front one but I am definitely not sure. I just discovered this site and will try to add a few photos if anyone could take a quick look and let me know if the coil was tested correctly. and could most likely be called out as being the issue and needing to be replaced. The number on the coil is
Stihl 4140 1303A MA-43 2166
Definitely appreciate any help on this. Thanks
PS Just tried to upload a few pictures but I keep getting the message that they are too large to be processed by the server. They were taken with an older samsung phone?! The largest one is only a little over 4mb
Wondering if anyone could help On a Stihl fs55r no spark issue. The trimmer is probably close to 15 years old I would guess. I have never had any issues besides cleaning the carburetor once and I also had to change the primer bulb just recently because the old one was split completely across the top.
A few weeks ago after finishing a day of cutting with it, I went to restart it for just a minute to get a few weeds I had missed earlier. I pulled and pulled and it didn't try to start at all. I thought maybe a spark issue was to blame because it didn't act like it wanted to start at all. The next evening I went out and tried again and nothing. At this point I tried putting a little fuel under the air filter to see if it would maybe start and quit so I could possibly have an idea if it was a carburetor issue, which it didn't really seem like. I got nothing. Compression felt like it always did.
At that point I took the spark plug out and grounded it to the engine and saw no spark while pulling on the starter rope. I then tried another new spark plug and got the same result. I then tried to reset the air gap on the ignition coil with a business card just in case it had somehow moved a little. That is the way I have done it on mowers in the past. I was told way back when I was a kid that was a good quick way to gap a coil. Still got nothing.
So where I am at now is, I have worked on vehicles and other small equipment both, but fortunately I have never had many issues with weed eaters. I am wondering if the coil is bad and if I tested it correctly? Not dealing with weed eaters much, it has me second guessing myself if I tested it correctly. It has two wires on it and I unplugged one at a time to rule out the on-off switch as maybe being the issue. I have had a few times in the past where I turned it to off but the weed eater stayed running. It hasn't happened in a few years though. Was I on the right path in testing it like that? I am not sure which wire needed to be unplugged. I am thinking the front one but I am definitely not sure. I just discovered this site and will try to add a few photos if anyone could take a quick look and let me know if the coil was tested correctly. and could most likely be called out as being the issue and needing to be replaced. The number on the coil is
Stihl 4140 1303A MA-43 2166
Definitely appreciate any help on this. Thanks
PS Just tried to upload a few pictures but I keep getting the message that they are too large to be processed by the server. They were taken with an older samsung phone?! The largest one is only a little over 4mb
