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  #1  
Old 07-24-2021, 04:16 PM
EternalArianne EternalArianne is offline
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Default 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…
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Old 07-24-2021, 09:17 PM
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CubDieselFan CubDieselFan is online now
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Could be a crank seal leaking or it is out of time.
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Old 07-24-2021, 09:29 PM
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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.
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Old 07-25-2021, 12:23 AM
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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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Old 07-25-2021, 08:54 AM
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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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Old 07-25-2021, 10:00 AM
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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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Old 07-25-2021, 10:11 AM
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Quote:
Originally Posted by ol'George View Post
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.
You must be one of them dudes who seat tires with fire!!
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Old 07-25-2021, 11:16 AM
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Quote:
Originally Posted by Billy-O View Post
You must be one of them dudes who seat tires with fire!!
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.
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Old 07-25-2021, 12:54 PM
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Dry the plug off with the torch also if the thing is flooded.
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Old 07-25-2021, 06:13 PM
EternalArianne EternalArianne is offline
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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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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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