Troubleshooting A Two-Cycle Engine That Won’t Start

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Published 2016-03-15
Tips for troubleshooting why a two-stroke engine won’t start. I have a Stihl HS 45 hedge trimmer with a 2 cycle engine that won’t start. In the video I’ll go through some basic troubleshooting steps to determine why.

Troubleshooting and maintenance steps include:

* Checking if the spark plug is wet
* Replacing the spark plug
* Testing the stop switch
* Checking the spark plug for spark
* Replacing the ignition module
* Replacing the fuel filter
* Replacing the air filter

I also have a string trimmer, edger, chainsaw, and leaf blower, and if any of these engines failed to start I would use the same troubleshooting steps that I used in this video to get them up and running.
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All Comments (21)
  • @williamfritz189
    That was perhaps the clearest, best-photographed and well-explained DIY video I've seen. THANKS!!
  • @MRHEEL-ys2rq
    You sir just earned a sub from me. Im having to repair my father's Stihl hedge trimmer and what you described very may have saved him 150 bucks
  • @ronsmoak2662
    Excellent breakdown of how to troubleshoot. I wish more videos were this good of getting to the point quickly.
  • @Summersblues1
    Just wanted to thank you 🙏 for making such a simple and easy to follow a video , i’ve been having trouble with my hedge trimmer lately , and this video, came in very handy, I hate all the videos were they talk too much ,and run you around in circles! Your video swas short ,to the point ,and very simple ,which is what we all want! Thank you so much for making it sincerely Ericc , ........I am now a new subscriber!
  • @perrywiggins
    Thank you for your great tips , hope too fix my hedge trimmer with the knowledge you have shared many thanks
  • @ngineerd1267
    Outstanding video. Great to see some good 2-stroke troubleshooting
  • @Mark-xk1ec
    Excellent video and very well explained. I'm at the getting a new Sparkplug stage, but will follow your guidance to try and resolve my similar issue - thanks very much.
  • @jamesardwan6160
    Thank you for your tips, they were the most informative I've been able to see.
  • Thanks very informative video , have the same Hedge trimmer . If I ever need this video I'll revert back to this great informative video . Thanks again for people like you that make life easier and cheaper to live with these self help videos .👍
  • @mickdog2
    very good editing and narrating. the timing and information was excellent.
  • STIHL 45 won't start, i've watched loads of videos, they all show how to fix something which is fine if the diagnosis is correct !! This guy is best by far. Love the simple diagnostic process, kind of reassuring. Just need to go do it !
  • @stripymccatpuss
    I bought the same model a few weeks ago, good information for the future
  • @chenglo8999
    Thank you for the great video! Hope i get my hs45 up n running!
  • @Pterocarpous
    Thank you! Very instructive. Will extrapolate to troubleshooting my Echo SRM-225 start issue. Ty for the spark plug gap info as well.
  • @simonhughes9449
    Evening iScaper1 - I hope this finds you well! Thanks for this video, I have the same machine purchased brand new from the dealer last week but showing no signs of life, which is odd. Never had this issue with a two-cycle engine, especially brand new out of the box, so this is all very good info for trying to determining the issue.
  • I have the hands this brother from another mother has the knowledge. The video was step by step & easy for any handy man to follow ! Thank you going to now put a new fuel one on bc my has rotted too be safe God bless
  • Thank you for detailed video I have same trimmer used only twice. It's always hard to start I've been using gas in can I might have same problem as you