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Author Topic: Another 4 stroke trimmer.  (Read 3583 times)

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Another 4 stroke trimmer.
« on: May 14, 2016, 08:39:01 pm »
So I have another Troy built 4 stroke trimmer and yes it is another freeby.   
The carb on this is Walbro WYL 187.   
So instead of rebuilding the carb I decided to try one of those Chinese knock offs. a Ruixing.

The carb was very cheap as in not much money.   I put it on and the trimmer starts up real good and idles good and run at half throttle real good.
Go to full throttle and it dies.   I try adjusting it but no good.

So I take the carb apart and find the main jet and I have these very small drills that I used for watch making.   I drill the main jet out and put it all
back together.   Bingo got wide open throttle now.    Trimmer idles good and accelerates good.    Just passing along some info.
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Re: Another 4 stroke trimmer.
« Reply #1 on: May 14, 2016, 09:08:44 pm »
GTK
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Re: Another 4 stroke trimmer.
« Reply #2 on: May 15, 2016, 01:02:44 pm »
good to hear someone  is smart enough to get one to run. please come to alabama and fix my six ;D
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Re: Another 4 stroke trimmer.
« Reply #3 on: May 15, 2016, 01:41:14 pm »
Nice fix Roger. 

Still only 4 stroke trimmer I had come in was a guy running 2 stroke mix in it.  He gave it to me free.  Changed plug, flushed it good and gave his trimmer back.
Told him what he was doing to make it not run.
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Re: Another 4 stroke trimmer.
« Reply #4 on: May 31, 2016, 06:19:19 pm »
anyone rebuilt the wyl carburetor did it turn out ok.
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Re: Another 4 stroke trimmer.
« Reply #5 on: June 01, 2016, 05:39:02 am »
Quote from: dannyupsolate on May 31, 2016, 06:19:19 pm
anyone rebuilt the wyl carburetor did it turn out ok.

I have rebuilt a few of the WYL series Walbro carbs with no problems.   The diaphragms get stiff in them just like any other carb.
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Re: Another 4 stroke trimmer.
« Reply #6 on: June 01, 2016, 05:23:11 pm »
was wrong thought wyl and wyla used same kit. k1wyla is kit for wyla. cheapest i found is 10 bucks shipped for 1 maybe they will combine shipping for 6. good to hear they rebuild ok.
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Re: Another 4 stroke trimmer.
« Reply #7 on: June 02, 2016, 02:13:44 am »
When rebuilding those carbs just be careful with the main jet where the plastic needle comes down into it.    That little brass jet has a tiny o-ring on it that is used to seal it from leaking fuel.    Some kits come with that o-ring so that you can replace it.   Just make sure the jet is seated all the way down if you take it out and replace that o-ring and make sure the hole in it is clean.
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Re: Another 4 stroke trimmer.
« Reply #8 on: June 02, 2016, 06:35:09 pm »
ordered 6 k1wyla  walbro kits from mowers4u on ebay 28 bucks shipping and all. These are not available aftermarket. fits some 4 cycle trimmers and mini tillers mtd/ryobi family.
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Re: Another 4 stroke trimmer.
« Reply #9 on: June 03, 2016, 09:10:04 pm »
How are these Troy Bilt 4-strokes?  They are rather appealing to me and I might go that way if I get another trimmer.
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