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Homelite ST185 (UT-15039-B) String Trimmer Parts
How to Test a Small Engine for Spark
If your small engine isn't starting, you'll need to diagnose many issues including the spark plug. This video walks you through the steps of how to test for a spark using a spark tester.
Quick Fix: How to Clean a Spark Arrestor Screen on a Small 2-Cycle Engine
This repair article will instruct you how to repair a dirty or damaged spark arrestor on your small engine.
How to Replace the Drive Shaft on a String Trimmer
Learn how to properly replace the drive shaft on your string trimmer in less than 30 minutes.
Quick Fix: How to Replace the Spark Plug in a Small Engine
This article will help you replace the spark plug on a small engine which will help get your gas powered equipment up and running again.
Discussion for the Homelite ST185 (UT-15039-B) String Trimmer
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I have a homelite st-185 and i was wanting to know how much compression should it have? My test shows i have 60lbs is that with in spec ?
Compression on a 2-cycle trimmer engine should be between 70psi and 120psi. 60psi is low. That would indicate a worn cylinder and piston rings.
I hope this helps,
Thanks mark that helps alot, but do you know if there are rebuilt kits?
Question: ST-185 Homelite Trimmer
James R. Brown
I have a ST-185 Homelite trimmer I replaced the primer bulb and it will not pick up fuel. When you pump it, air bubbles will pump out of the filter but it won`t pick up fuel to the carb. What`s next?
Reply: ST-185 Homelite Trimmer
replace filter !! and check that the fuel lines are still good
Question: Homelite St185
I have a Homelite st185 line trimmer the pull rope broke. I'm trying to fix but can't get the clutch cover and clutch off. Is there a trick or special tool needed? If I get it off is there a trick to replacing the starter rope? Thanks.
Reply: Homelite St185
It takes a Torx screwdriver to take out the bolt in the center of the clutch then the clutch drum pulls off, you will have to put a piston stop in the engine( if you don't have one, take out spark plug and stuff a rope into the cylinder being careful not to lose the rope.) then with a brass drift the clutch plates unscrew with a light tap.
Accessories for the ST185