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MC025 Poulan Trimmer - Overview

Diagrams for MC025

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Fuel Line (25" Length) – Part Number: 530069247
$12.81
In Stock
Fuel Line (25" Length)
★★★★★
★★★★★
(5)
Part #530069247
This 25-inch fuel line carries fuel from the tank to the carburetor, ensuring proper engine operation. Made from durable clear plastic, it is designed to withstand regular use but may become clogged or brittle over time. Replacing a worn or damaged line can help prevent leaks and restore reliable starting and performance.
Engine Fuel Filter – Part Number: 530095646
$9.62
In Stock
Engine Fuel Filter
★★★★★
★★★★★
(4)
Part #530095646
This Genuine OEM fuel filter is designed to maintain the performance and longevity of your equipment by preventing dirt and debris from entering the carburetor. Located inside the fuel tank, this essential component ensures clean fuel delivery, protecting the engine from potential damage caused by contaminants. Sold individually, the filter is built to meet original equipment standards for fit and function. Over time, the filter may become clogged, restricting fuel flow and making engine starts more difficult. For optimal performance, it should be replaced—not cleaned—at the first sign of blockage or wear.
Purge Line – Part Number: 530069216
$17.55
In Stock
Purge Line
★★★★★
★★★★★
(2)
Part #530069216
This is the Genuine Craftsman replacement part. It is made out of Flexible Rubber and is Sold Individually. The purpose of the 530069216 Tank Purge Line is to return the excess fuel that is in the carburetor after the primer bulb has been pushed. The excess fuel is forced through the purge line back into the fuel tank. Over time the Tank Purge Line will become brittle and crack and will need to be replaced.
Piston Ring – Part Number: 545154001
$6.95
In Stock
Piston Ring
★★★★★
★★★★★
(1)
Part #545154001
This metal ring in your engine, known as the piston ring, seals the gap between the piston and cylinder wall. It makes sure that the gases produced during combustion do not escape and that the engine maintains the pressure it needs to run. If the piston ring is damaged, oil can seep into the combustion chamber, causing your engine to exhibit rough idling and your machine emit blue smoke. To switch out a defective piston ring, detach the old ring from the piston with a screwdriver. When installing the new ring, you may need to compress it to make it fit properly. Please be aware that this genuine OEM replacement part is bought individually. It is recommended that you replace all the piston rings in your machine at once, as they tend to wear down at the same rate. Carefully review your user manual to determine how many rings your machine needs before placing your order.
Cover – Part Number: 545003365
$10.95
On Order
Cover
Part #545003365
This OEM spool cover is designed to protect your trimmer spool and keep it free from damage and debris. It securely holds the trimmer line in place, preventing it from unraveling while you operate the trimmer. The cover, made of plastic, is located at the bottom of the trimmer head. If the cover is broken, you may notice cracks, chips, or missing parts. This can result in tangled or improperly feeding trimmer line. Furthermore, exposing the spool and line increases the risk of damage and accelerates wear. You will not be able to trim evenly or precisely. Replacing a broken spool cover is a simple task that requires no tools. Just remove the old cover and snap the new one on. Please keep in mind that the spool cover is sold separately from the spool.
Knob – Part Number: 537419601
$9.63
In Stock
Knob
Part #537419601
This is a genuine Craftsman part for use with Trimmers. The line tap knob releases the cutting line when you bump the knob on the ground while the spool is turning. The most common reason for replacing the bump knob is when bumping the knob against the ground no longer causes the spool to release more line. This part is sold individually. The tool that you will need to replace the line tap knob is a flat-head screwdriver.
Screw Catcher – Part Number: 530015814
$5.95
In Stock
Screw Catcher
Part #530015814
This is a standard hardware which has multiple applications based on your tool. It is sourced from original equipment manufacturer for use with a variety of power equipment. Please refer to diagrams for proper application. This screw is made out of metal and it is sold individually. Requires a hex key or an allen wrench to install or remove it.
Throttle Control – Part Number: 530038682
No Longer Available
Throttle Control
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★★★★★
(2)
Part #530038682
This is a genuine Poulan replacement part, it is sold individually. The purpose of the 530038682 Trigger is to control the speed at which the spool and line rotates on the model shown below. It is connect to the Throttle Cable Assembly. Then to the throttle linkage on the carburetor.
Assembly. - TNG7 Cutting Head – Part Number: 537419214
No Longer Available
Assembly. - TNG7 Cutting Head
★★★★★
★★★★★
(2)
Part #537419214
This an authentic manufacturer approved replacement trimmer head designed for use with gas string trimmers. This trimmer head is designed to quickly and efficiently cut through grass. This item includes the bump head knob, spool with string, cover and metal eyelets. This cutting head is sold individually.
Upper Shaft Kit – Part Number: 575260201
$49.45
In Stock
Upper Shaft Kit
Part #575260201
Smooth trimmer operation depends on a straight shaft and a working drive cable. Replace the upper shaft kit if the tube is bent, the cable is worn, or the head turns poorly. First check both shaft connections and remove any grass wrapped around the cutting head. Confirm fit with the full tool model number. Review the parts diagram because kit contents may differ. Let the tool cool, remove its battery or spark plug wire, and keep all clamps and fasteners secure.
Gasket Set – Part Number: 530071750
No Longer Available
Gasket Set
Part #530071750
This is a Manufacturer Approved replacement kit used on a variety of Gas Trimmers/Pruners. This gasket set includes the major gaskets to replace when rebuilding the engine. Its purpose is to make an air tight seal so that no air/oil leakage occurs. Over time gaskets tend to deteriorate and will need to be replaced. Gaskets in this kit are made out of Composite Material and O-Rings are made out of Rubber.
Screw – Part Number: 530016429
$6.72
In Stock
Screw
Part #530016429
This is an original Craftsman replacement part. The screw is designed by the manufacturer for use in yard tools such as trimmers, blowers, and brushcutters. This part is made of metal, and is generally used in securing the air box assembly. Please be aware that there are different screws used in the machine. Refer to the parts diagram to be sure of ordering the correct part. You may require a screwdriver when replacing this item. This part is sold individually.

Common Symptoms of the MC025

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Both the Fuel line and the Engine fuel line, where dry rotted.
56 of 74 people found this instruction helpful.
  • Victor from SCOTTSVILLE, KY
  • Very Easy
  • 15 - 30 mins
  • Pliers, Socket set
1) While still attached to the fuel tank, I first sized up the old fuel lines with the newer fuel lines.
2) With a pair of needle nose players, I then removed the old dry rotted fuel ?? lines, from the fuel tank.
3) I cleaned the fuel tank and around the carburetor area, to insure that there was no debris, that could possibly fa ll into the path of the new fuel lines installation.
4) I then installed the smaller one of the fuel lines, so that it would be out of the way, of the larger fuel line. I Pulled the fuel line through the smaller hole in the fuel tank, with needle nose players. I pulled the smaller fuel line out through the fuel tank filler hole, attached the fuel filter to the smaller fuel line. I Made sure that the fuel filter was extended to the furthest end of the fuel tank bottom. Six inches in all. I then attached the smaller fuel line to the carburetor.
5) I Installed the larger fuel line, followed the same procedures as the smaller fuel line.
6) Both fuel lines where cut on an angle for easy installation. No lubricant was necessary.
7) I filled up the fuel tank with fresh fuel and oil, new air filter and spark plug. It started on the first pull. Amazing.
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installing fuel through fuel tank wall
11 of 18 people found this instruction helpful.
  • RICHARD from BROCKTON, MA
  • Difficult
  • More than 2 hours
  • Pliers, Screw drivers
To start, remove the plastic carburetor grill. DO NOT remove the carburetor. The fuel line has to be sliced down to fit through the tank hole and get it in far enough up into the tank to grab with needle nose pliers.( need long needle nose pliers which I didn't have) I placed about six inches of the plastic tubing in the jaws of vice so t hat half of the tube was squeezed in the vice jaws. I then used a razor blade to shave off the exposed tube. I slipped the shaved end of the tube up through the tank hole far enough to grab with long tweezers and pulled it up to where I could grab it in the tank with needle nose pliers. I put light lube oil on the remaining tubing and pulled it through. It takes a steady firm pull to pull it in. Install the filter and pull the tube back down into the tank. I also used a small diameter drill bit and with my fingers slightly reamed the tube ends to ease the tube over the filter and carburetor nipples. To prime the engine, spray starting fluid into the carburetor and start. Repeat until the engine will run on fuel. It took me hours to figure this out, but will take less than an hour with this method.
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Clogged muffler
5 of 9 people found this instruction helpful.
  • Rosanne from BRIDGEWATER, VA
  • A Bit Difficult
  • 30 - 60 mins
Remove the 4 screws holding the rear motor casing. Then you can take the easy route and drill through the front motor housing with a 3/8 to 1/2 bit in order to access the front muffler screw. If you want to work harder you must remove the motor from the shaft, remove the clutch assembly (this requires a long 15t torx bit, removing the spa rk plug to stuff the piston with rope or rag to seize up the piston, and then removing the front motor casing to access the front muffler screw). Once you access both muffler screws remove them with the t20 torx driver. Install the new muffler with the small gasket inside the housing, and the larger gasket/heat shield between the muffler and the motor.
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