Homelite Garden - Page 5 - Recent Questions, Troubleshooting & Support
Weed trimmer wont start, spark
The timinmg is preset by the permanent keyed slot built into the inside of the flywheel where it mates with the crankshaft. If the key was broken off, you would get No spark because of the nature of the magneto ignition. Your compression is actually pretty low for a 2 stroke. It should run higher like around 90+. Try this. With plug removed, cover plug hole with thumb and give the pull start a real strong pull. It should push your thumb off of the hole. If it doesn't the compression is too low for the engine to run. Scored piston walls, or cylinder walls could be the problem. Again 60PSI is really low. I would remove the jug and check for piston scoring and cylinder scoring. The engine can be easily rebuilt (but not real cost effective).
How to sdjust carburator "?"
Turn both H and L adj. crews all way in to right counting number of turns on each. Back each one out 1 1/2 turns engine should start adj. H by holding throttle to maximum and adjusting until max rpm then adj.L for idle and very little hesitation when quick throttle. You may the have to tweet each.
Homelite ST-155 has no spark
Heck switch by removing wire to coil. If no help remove spark plug laying metal part of plug agains cylinder head, pull cord and watch for spark. If you have none look for grounding if wire to coil along with grounding of spark plug wire. If you find no problem replace coil making sure you check gap of old coil and match with new.
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