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String Trimmer Question- Running Rough


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#1 willy1094 OFFLINE  

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Posted July 24, 2013 - 08:37 AM

Hello everyone,

Ok, I know this is a economy/powerking forum but this is my home and I know we have some sharp people here so I'm going to ask a trimmer question.  I have a Solas trimmer with a Briggs and Stratton Force 4cycle engine on it.  Today I was trimming and ran out of string.  Well, I had enough to finish so I did but I noticed that the engine started running wierd.  Up to now this trimmer has been perfect and I've had it almost 10 years now.  I took it to the building and put new string on and tried staring it back up.  It was a beast to start and the idle is rough.  It also hesitates when I hit the throttle.  Anyone have any ideas?  Could this just be a leak in the fuel line somewhere ( I couldn't see any) that just happned to start the same time I reached my last bit of string or did running it with a short bit of string some how mess it up?  There are not adjustments on the carb.  I checked the oil and it was still at the right level.  The plug had a little white to it (running hot?) but didn't look real bad.  I've searched the web but couldn't find anything on this trimmer.

 

I can move this thread if needed but like I said, I know there are "engine guys" in here and thought someone would be in the know.

Thanks

 


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#2 boyscout862 ONLINE  

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Posted July 24, 2013 - 08:49 AM

You may be a victim of ethanol in the gas or water in the gas. The ethanol can damage rubber hoses and gaskets. Inspect everything. Clean and readjust the needle valves. Good Luck, Rick


Edited by boyscout862, July 24, 2013 - 08:50 AM.

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#3 David Brown OFFLINE  

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Posted July 24, 2013 - 09:16 AM

I'm having the same problem with my Echo trimmer.  I just had it serviced for the year and it ran great when I got it back.  Next time I went to use it, it barely ran enough to get the job done.  Then my daughter's go cart started acting the same way.  it will idle (kind of) but it refuses to run at full speed.  The trimmer is just a couple of years old and the cart is 5 or 6 years old.  I use ethanol free in all of my equipment.  Could be water in the gas I imagine.  I got other things running on the same gas it they are fine.


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#4 Bmerf OFFLINE  

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Posted July 24, 2013 - 10:11 AM

The fuel line is the suspect. These lines after a few years will develop cracks, which allow air into the line and cause many different problems. If you can get it running, look at the line where it enters the carb. If tiny bubbles are present, replace fuel line. My craftsman chain saw gave me a fit until I noticed the bubbles. This year, the weed eater acted up, first thing I looked at, fuel line and it was junk. Pick up a couple of feet of the good fuel line, yellow/greenish color, and keep it on the shelve. (Reminds me, I need to pick up some myself.)


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#5 larryd OFFLINE  

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Posted July 24, 2013 - 11:29 AM

I suspect fuel line or filter

 

larryd



#6 MH81 ONLINE  

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Posted July 24, 2013 - 12:11 PM

I also agree with the fuel statement, but if it isn't that, check the muffler to make sure it isn't plugged up with rust or whathavya.

#7 HDWildBill ONLINE  

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Posted July 24, 2013 - 12:22 PM

BMERF, is correct.  I repair quite a feww weedeaters, chainsaws each year and the #1 issue is the fuel lines.  Look inside the tank and see if the filter is still connected to the fuel line.  If you replace the fuel line replace both lines. Save yourself another headache.


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#8 jms180 OFFLINE  

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Posted July 24, 2013 - 04:12 PM

just finished working on a friends 4 cycle troy bilt trimmer. Replaced all fuel lines but still would not run unless added fuel to carb intake. Removed carb and disassembled cleaned all small passages with carb cleaner. It starts on first pull and runs great. Trimmers are a pain to work on.
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#9 TerryD OFFLINE  

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Posted July 24, 2013 - 04:35 PM

I had a similar problem on a 2 cycle, I know... you said 4 cycle. My problem was that the siphon hose in the gas tank cracked where the filter was which kept the fuel from being drawn into the fuel line if I had less than 1/2 of a tank. I'd look for a cracked fuel line or disconnect at the carburator and make sure you have a good solid fuel supply. Ethanol will swell the inside of a hose and it will appear just fine on the outside.

 

My trimmer was about 10 years old too.

 

Good luck!



#10 willy1094 OFFLINE  

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Posted July 26, 2013 - 05:57 AM

Thanks everyone!  I'll check out the fuel lines again.  I may just go ahead a replace them to rule that out.  It was just strange how it happened all of the sudden.  Ran fine for 15 mins then started running rough.  I'll stop back when I replace the lines and let you all know how it went.


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#11 David Brown OFFLINE  

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Posted July 26, 2013 - 06:16 AM

I'll be interested in what you find.  I inspected my fuel lines yesterday and they seem fine.  I started it as best I can and saw no bubbles.  I just had it serviced for the season so I imagine new filters were put on it.



#12 HDWildBill ONLINE  

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Posted July 26, 2013 - 09:57 AM

Last year I was helping our son and doing some trimming, everything was fine for about 30 min's  then when suddenly it died but still had fuel.  But then it would fire back up and then died again after a few minutes.  The third time it did it I realized that I was turning the trimmer sideways and it would die.  Sure enough the fuel line had broken.  Got it home and put 2 new fuel lines and still using it today.

 

DB I doubt they replaced the fuel filter, it's in the tank and usually there isn't enough line to just pull the filter out and change it unless you have a Stihl or an Echo that allows you to work on the lines without having to thread the line through a hole in the tank.






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