I have a Stihl FS 55 trimmer. It always started easy in previous years. It sat over the winter, but I did drain fuel before winter. Now for the first start in the spring, it did not fire at all.
- I changed spark plug.
- I checked for spark and it has spark. Checked with putting plug against case and using spark tester.
- I took carb off and cleaned carb. I did not replace any diaphrams or other parts in the carb. Carb looked really clean before I cleaned it.
- Checked spark arrestor and it was clean.
- Tried higher octane fuel mix.
- Checked compression and it was in the 80-95 range.
- I tried putting fuel and carb cleaner in piston, still no fire.
After sitting the winter, I can understand if there was a fuel problem due to something in the carb. But I am thinking it should at least fire when I put fuel or carb cleaner in the chamber and air filer inlet. I did not test the kill switch, but since I get spark, I am thinking that should not need to be tested.
Any ideas on what to check next? Thanks so much.
- I changed spark plug.
- I checked for spark and it has spark. Checked with putting plug against case and using spark tester.
- I took carb off and cleaned carb. I did not replace any diaphrams or other parts in the carb. Carb looked really clean before I cleaned it.
- Checked spark arrestor and it was clean.
- Tried higher octane fuel mix.
- Checked compression and it was in the 80-95 range.
- I tried putting fuel and carb cleaner in piston, still no fire.
After sitting the winter, I can understand if there was a fuel problem due to something in the carb. But I am thinking it should at least fire when I put fuel or carb cleaner in the chamber and air filer inlet. I did not test the kill switch, but since I get spark, I am thinking that should not need to be tested.
Any ideas on what to check next? Thanks so much.