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4 stroke trimmers ?

Discussion in 'Mechanic and Repair' started by rollman, Mar 9, 2012.

  1. rollman

    rollman LawnSite Member
    from Bear DE
    Posts: 74

    I have a question for you guys using 4 stroke trimmers . I was talking to the Stihl Rep yesterday about the FS100RX , he was saying the valves need adjusting from time to time . Are any of you finding this to be true ?

    Does the same go the Shindaiwa T254 Hybrid 4 . If this is the case it sounds like a huge PIA . TIA

    My local dealer has both models on sale , the Stilh is 320 and Shindaiwa is 313 .
  2. rlitman

    rlitman LawnSite Bronze Member
    Posts: 1,552

    They're supposed to be adjusted every 100 hours. Detailed instructions can be found on this site if you search. It takes but a few minutes to do.
  3. BigFish

    BigFish LawnSite Gold Member
    Posts: 3,253

    In my opinion, all the so-called 4stroke and real 4 stroke hand held stuff is just a bunch of over- hyped junk!! They weigh more, ya STILL gotta use gas-oil mix in most of em, AND ya gotta adjust the valves!! So somebody please explain to me the advantage!! Include full color 8X10 glossy photos if needed!

    Just get ya a two stroke and have at it.
  4. T-Trim

    T-Trim LawnSite Member
    Posts: 204

    we have nothing but 4mix stihl. Haven't adjusted one yet. Very powerful and quiet compared to the 2 cycle ones. Also runs at a lower rpm.

    Posts: 1,343

    We have had nothing good to say about the four stroke trimmers. That being said everyone get used to it because as a industry that's where we are headed.
    Posted via Mobile Device
  6. rlitman

    rlitman LawnSite Bronze Member
    Posts: 1,552

    What do you have that's bad to say, that is actually caused by 4-stroke operation being inferior to 2-stroke, and not caused by poor fuel, or the awful carbs we're forced to use because of environmental regulations (which are found on 2 and 4 stroke machines anyway)?

    Posts: 1,343

    Tough starts, cold running, when you have to warm up a trimmer for 30 seconds each property its a serious waste of time.
    Posted via Mobile Device
  8. pugs

    pugs LawnSite Gold Member
    Posts: 3,022

    Shindaiwa had a really weird spec on theirs. I think they changed it to something easier to keep track of but it used to be adjust valves every 157 hours or some weird number. I will have to look it up to be sure.

    Does this ever get done? Probably not.

    Supposed to adjust valve on Kawasaki engines every 300 hours. How many people actually do it?
  9. Patriot Services

    Patriot Services LawnSite Fanatic
    Posts: 12,929

    Damn near impossible to keep track of hours on a handheld. I've always gone by the pull feel method. When it starts to get hard to pull its time to check the valves.
    Posted via Mobile Device
  10. Procareope

    Procareope LawnSite Member
    Posts: 61

    It sounds like a daunting task, but with a few simple tools and about 15 minutes adjusting the valves isn't that difficult. It just becomes a part of regular maintenance. Shindaiwa's new time frame for adjusting the valves is at 135 hours (T344), which is also what Stihl is now recommending. How you keep track of these hours is a mystery in itself.

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