- Joined
- Feb 7, 2013
- Messages
- 2,489
I have this older Stihl 028 WB chain saw that has points ignition. It has been running poorly and it surely is an ignition
problem. Also, I have cleaned any oxidation visible under the coil and points with no success. It runs but misses erratically
at any engine speed. I have replaced the spark plug, the capacitor, and the ignition coil and the same malady lingers on.
I have had the flywheel off a dozen or more times using my home made flywheel puller so finally set it aside and decided to
vent on Hobby Machinist.
On a different note, more along the lines of machining I am including a photo of the flywheel puller I made for Stihl saws.
It was a while ago that I made it and I remember the the threads on the flywheel are metric and my lathe does not do
metric threads. I used the closest thread pitch to the metric threads and the flywheel tool threads on about two turns before
binding. Fortunately it has enough thread purchase to pop the flywheel off.
It's a fun and somewhat challenging project if a person has a need for such a tool.
While I was at it I took a photo of the saw and the parts I have replaced. It's been a good saw but this has me somewhat perplexed.
I'm gonna sleep on it and give it another go in the morning. One thing I did notice is that the key for the flywheel doesn't stick out
much on the crank, leading me to believe that possibly the flywheel is moving back and forth a little on the crank. I have another
parts saw so will look through my parts and see if I have a spare key. Other than that, there isn't much left. I have cleaned the points and adjusted them so pretty much have ruled out the possibility that the points are faulty.
The newer Stihl 028 saws have pointless ignition systems, apparently some sort of CDI "capacitive discharge ignition" and there are
aftermarket CD chips to replace points setups too. I have tried those and the ones I had worked a while and eventually failed completely.
I'm open to any ideas anyone might have concerning this
perplexity....
problem. Also, I have cleaned any oxidation visible under the coil and points with no success. It runs but misses erratically
at any engine speed. I have replaced the spark plug, the capacitor, and the ignition coil and the same malady lingers on.
I have had the flywheel off a dozen or more times using my home made flywheel puller so finally set it aside and decided to
vent on Hobby Machinist.
On a different note, more along the lines of machining I am including a photo of the flywheel puller I made for Stihl saws.
It was a while ago that I made it and I remember the the threads on the flywheel are metric and my lathe does not do
metric threads. I used the closest thread pitch to the metric threads and the flywheel tool threads on about two turns before
binding. Fortunately it has enough thread purchase to pop the flywheel off.
It's a fun and somewhat challenging project if a person has a need for such a tool.
While I was at it I took a photo of the saw and the parts I have replaced. It's been a good saw but this has me somewhat perplexed.
I'm gonna sleep on it and give it another go in the morning. One thing I did notice is that the key for the flywheel doesn't stick out
much on the crank, leading me to believe that possibly the flywheel is moving back and forth a little on the crank. I have another
parts saw so will look through my parts and see if I have a spare key. Other than that, there isn't much left. I have cleaned the points and adjusted them so pretty much have ruled out the possibility that the points are faulty.
The newer Stihl 028 saws have pointless ignition systems, apparently some sort of CDI "capacitive discharge ignition" and there are
aftermarket CD chips to replace points setups too. I have tried those and the ones I had worked a while and eventually failed completely.
I'm open to any ideas anyone might have concerning this
perplexity....
