Video how to fix
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.
SOURCE: how do you fix homelite st 185 weedwacker pull start
Here is a link to that weed cutter...
http://www.odref.com/homelite/string-trimmers/ut-15039a.PDF
you need to unscrew part#37 .. it may be on very tight... hope this helps
Tobaz
SOURCE: My Homelite ST 155 gas trimmer is hard to start
You have a leak on the carburetor. internal or external. the fuel we run now a days eats the gaskets up. gasket set is $8. +tax Easy to do if you pay attention to how it comes apart. The whole kit is a little more plus the little pump ball might be leaking too. Easy fix for most.
SOURCE: Installing new line on my string grass trimmer
Cut two separate pieces of string, about 7 ft. each.
Stick the end of
the line in the hole on the inside of spool.
Wind clockwise onto spool,
putting the line that is closest to the ground on first.
Once you have
winded this piece on, lock the last 4 inches of line through the slits
on spool.
Repeat process for second piece of line, locking the last 4
inches in slot opposite the other locked in piece.
Put the spool on the
trimmer, feeding the end of lines through either hole on trimmer.
Before you push the spool all the way on, pull the strings out of the
locked position.
Jim
SOURCE: Fuel Lines
Off of the primer bulb there should be two lines, one goes to the tank, the other goes to the carb
SOURCE: What is the oil to gas ratio for a Homelite ST-155
40 to 1,,,40 parts petrol to 1 part oil,,,,1/2 oz oil to 1 pint or petrol
but iv all ways ran mine on 30 to 1 ok,,it smokes a little,,but if its smoking there is oil getting to the piston and bearings,,,so the engine will live a lot longer,,,my pall runs his on 20 to 1??? now that smokes!
but he's run it on this for 25 plus years??? and he gun's it to death,,
so il say no more!
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