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#1
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String trimmer
So I picked up a John Deere C1200 string trimmer off Craigslist for $40. The guy said it “didn’t run” because the fuel lines and primer bulb literally fell apart. It came with both a tiller and edger attachment as well, so I figured it was worth it just for the attachments.
I replaced the primer bulb and fuel lines, still won’t crank. New air filter, spark plug, and even new carburetor. Still won’t crank. It is getting spark I can see the tiny blue jolt on the plug if I remove it and ground it out while cranking. I know fuel is getting into the piston chamber as it sputters out the spark plug hole when I try to crank with the plug removed. Is there something I’ve missed or is this just a lost cause? I think these new carbs are supposed to be “plug and play” but is there a chance it needs adjusting in some way? I also found out that this isn’t truly a John Deere, it’s just Homelite with a green shell and JD sticker on it. So there’s that too… |
#2
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Could be a crank seal leaking or it is out of time.
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1572, 1864 x2, 1810 x2, 1863 & GT1554(Dad's Ole Mowers), 1811,782D, 1872 x2, 782DT(Sold), 3235, 1860, 1772 with 3-point and Turbo. |
#3
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Check the exhaust for obstructions, Mud dabbers like to pack the muffler outlet with mud and it will never run with the exhaust plugged,
------a very common problem. |
#4
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Ol'George is right, they won't run with a clogged exhaust; maybe not mud dabbers, but it could be a clogged/carboned spark arrestor screen. So common in string trimmers that that's pretty much where I start looking when someone brings me one to repair (or just gives to me - that's happened a lot lately, folks getting rid of their gas equipment and buying battery powered tools).
If the carb isn't delivering sometimes a shot of starting fluid or an ounce or two of mix will get it to run for a few seconds indicating it has spark and is in time. If the exhaust is clear and a shot of fuel won't get a pop or two, then it's time to look at the piston/cylinder through the exhaust ports and see what can be seen. Also a quick look at the fly wheel key. Let us know what you find.
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147 w/Electric Lift - the tractor that says "Ni!" 147 w/no lift at all - the tractor called "WallE" QA48 deck, 1a tiller with one extension, QA36B snow thrower, QA42 blade and various other bucketraters, grassenators and dirtavators. |
#5
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I agree with most who chimed in....
Also....you might have flooded the dang thing.... Dry it out and try without the choke and primer bulb.
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Two 125's and a 124 all with 42" decks Plow blade #2 Cart QA36 snowthower |
#6
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If flooded, I dry out a cylinder by removing the spark plug and sticking a lit propane torch near the plug hole and pulling the rope many times till it "pops" You will have to relight the torch a few times as the suction most times sucks out the flame, be careful not to burn/scorch surrounding plastic.
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#7
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Quote:
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Two 125's and a 124 all with 42" decks Plow blade #2 Cart QA36 snowthower |
#8
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No "dude" just 60+ years of experience of what works.
A little puff of ignited extra fuel out of the plug hole hurts nothing. I would not suggest one splash fuel all over the unit and light it on fire. I do give most people credit for common sense -----( unless they are an elected official) As far as seating beads on tires big or small, a blast of air is enough from the tire machine or a large portable tank usually is sufficient , depending on the situation. There are also other methods or combination of methods that will work. I will not go into detail to derail this thread. |
#9
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Dry the plug off with the torch also if the thing is flooded.
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#10
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Ok I gave everything a good looking over, the exhaust looks clean, as well as everything else. I think the guy stored it well, it’s just gas sitting destroyed the fuel lines and primer bulb. I did notice that even though I replaced the fuel lines, there is a tiny leak around where the line exits the tank. Could that small suction of air around there cause it to not crank? Is there a good way to seal that; I thought the hose was supposed to be snug and seal it but I guess not?
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