Question about Craftsman 25cc Gas Line Trimmer

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Craftsman trimmer 358.791050

358.791050 Replaced fuel lines and checked diaphragms for cracks. When started with choke, it'll rev sky high, but when switched to "run", it'll bog down and stall out. It seems to be starving for fuel, but all lines are clear and clean. ???

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Posted on Jan 02, 2017

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SOURCE: Craftsman Wee trimmer will only run when tilted on its side.

its your flaot in your little carb

Posted on Mar 24, 2009

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SOURCE: Craftsman trimmer won't prime

A new carburetor would be simplest solution. You could try disassembling the carb, cleaning and replacing diaphrams, but just replacing the carb would be my choice. What is the model # on the trimmer and I can tell you the part # of the carb you need.

Posted on May 24, 2009

#1 Taper
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SOURCE: Trimmer wont run when i take it off choke

No, it will not. Don't take the fuel mix screws out, it's not necessary.
You will need to disassemble the carburetor and spray with carb.cleaner. Make sure the small screen in the carb. is free of debris. Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152), to clean the small portals in carb. Reassemble and start.

(NOTE: If the cleaning doesn't work, then buy a carb. kit and replace all appropriate parts.)

If you need further assistance, just let me know.

Jim

Posted on Jun 15, 2009

  • 168 Answers

SOURCE: Craftsman 32cc Trimmer Runs with choke at idle, then stalls

Sounds like somewhere you have a air leak. Most likely it's somewhere near the carburetor intake or maybe the carb itself. Could be a line from the primer if it has one and i do believe it should that could be leaking or loose. Good luck.

Posted on Aug 02, 2009

canbruce75
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SOURCE: Craftsman trimmer won't start

Let's start with the easy stuff first. Remove and clean the spark plug. Look into the tank and fish out the fuel filter. It should be stuck in the end of the fuel line in the tank. I usually use a short piece of coathanger with a small hook bent into the end of it. Clean or replace the fuel filter. The next thing is to clean the small screen at the exhaust. Remove any carbon build-up there that you can. Sure hope this helped and best wishes.

Posted on Aug 17, 2009

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1 Answer

Can start start engine with the choke engaged. as i try to disengage choke the engine stops. I feels its starving for fuel. I can get a few revs up with the accelerator but then quickly stalls.


blocked main jet
problem diaphragm
leaking/cracked primer bulb
check price of new carby on e-bay before buying parts as the kits can be more expensive than a new carby

Jul 16, 2016 | Garden

1 Answer

It will idol when choked apon release motor revs big and stalls


So it idles fine when the choke is on but not when its off, am I correct.


When the choke is on, the butterfly on the carb is closed. Meaning that Air is restricted upon entering the carb. This is telling me you still have a fueling issue. As when the butterfly is closed, the engine is getting the optimum amount of fuel and air to burn. However, when you release the choke, you open up the butterfly on the carb mean more air can get into the carb, in turn this draws more fuel through the carb to create that optimum burn.

Yours however isn't getting the fuel it needs when the butterfly is open, meaning its getting too much air and not enough fuel. Check and clean carb, replace any fatigued gaskets and diaphragms.

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1 Answer

Craftsman trimmer 25cc


Diaphrams can be tricky sometimes...seating can be irritating. If carb disassembled and cleaned out...might have to check adjustments. Make sure screw didn't get loose. I had one do that before when governor broke.

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1 Answer

My craftsman weedwacker starts on full choke then at half choke it still runs but i have to really rev it and then when i move choke to off it dies


This is fuel starvation, start with easy things first, replace the fuel filter in the tank, check the condition of the fuel hoses up to the carb for splits, cracks or leakage, replace if required

Jul 03, 2012 | Garden

1 Answer

My weed eater will run for about 3-5 seconds in the half choke position, but turns off every time. My instructions say to leave it running in the half choke position for about 10 seconds and then push it...


Carburetor. It is always the carburetor 90% of the time on these. There are gaskets and diaphragms in these little carburetors that go bad and periodically need to be replaced. The introduction of ethanol into our pump gas has only hastened this situation. Your carburetor is dying "lean" as they say, and is a result of lack of fuel flow through the idle jet and the high speed jet...probably due to a stiff fuel pump diaphragm and metering diaphragm. They sell a little bag with replacement parts to make it work right again. It is called a G & D kit (gasket and diaphragm). You HAVE to know the manufacturer and the model number of the carburetor to order the right one though.

Aug 13, 2011 | Craftsman 25cc Gas Line Trimmer

1 Answer

My Craftsman 17cc gas weed trimmer wouldn't start.


Hi There, Check the primer bulb for tare or pin holes. Replace it. Check and clean carb jet it maybe plugged with debree. Also check for spark which you didn't say. Replace with correct plug.
Note; Do not use strong cleaners on rubber seals (O rings and gaskets) They dry up and crack.
If needed use a dabble of grease on seals

Jun 13, 2011 | Craftsman Garden

1 Answer

String trimmer won't start. How do I flush the


To flush system
Drain tank, use primer bulb to push out fuel in the lines, refill, use primer to bring in fresh fuel. You may need to pull the rope a few times with the choke on, and then push the primer several times again. Sometimes you may need to put a few drops of fuel into the throat of the carburetor to help it start to fire.
If the problem is severe enough, you may need to remove the carb to disassemble and clean. I have listed a few things to check.


Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

Nov 12, 2009 | Homelite Mighty Lite Lawn Trimmer

1 Answer

Primer bubble is cracked.minimal fuel is getting to carburator. when it starts it will run a few seconds then cut off.Won't run except in full choke. Please Help


The primer bulb needs to be replaced. It is introducing air to the system and not allow fuel to flow. Replace it and check the fuel lines while you are at it.
HTH
Good Day

Oct 29, 2009 | Craftsman 25cc Gas Line Trimmer

1 Answer

Wont run in run position


if it runs on choke only and it sat up for two or three months the carb diaphragm may be brittle and not pumping fuel. install a carb diaphragm and gasket kit or try opening the high speed jet a 1/4 turn

Jul 01, 2009 | Craftsman 25cc Gas Line Trimmer

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