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Piston Ring

Part Number: 545154001
PoulanWeed EaterHusqvarna
Availability: 25+ in stock
Price: $3.99
Quantity:
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*This part replaces obsolete part #: 530055120 and 530049903.

Product Information
Manufacturer: Poulan, Weed Eater, Husqvarna
Product Number: 545154001
Classification: Part
Weight: 0.01 lbs.
Shipping: Ships Worldwide
Description:
This is an authentic OEM sourced replacement piston ring used on gas Trimmers and blowers. A worn or broken piston ring will allow combustion gases to escape the seal and enter the crankcase, causing low compression and a loss of power. If compression is reduced significantly, the engine will not run at all. This part is made out of metal and is sold individually.

To complete this repair you will need a set of wrenches, pliers and a screwdriver.
Compatibility

This part is compatible with the following machines:

Poulan
Weed Eater
Husqvarna

Products Compatibility

This item works with the following types of products:

  • • Blower
  • • Edger
  • • Hedge Trimmer
  • • Pruner
  • • Trimmer
Questions & Answers

What are the dimensions of this ring? Thickness? Thanks!
Roger for model number Weed eater Fl20
Hello Roger and thank you for writing. This ring is 1 x 1 x 1 inches. Hope this helps!
Repair Instructions: Submitted by Customers Like You
4 of 4 people found this instruction helpful
Tool Type:
Blower
Parts Used:
Piston Ring - 545154001
Repair Difficulty:
Medium
Time Spent Repairing:
More than 2 hours
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set, Ring Compressor, Allen Wrench
Very low compression. The piston ring broke into 2 pieces.
Removed the engine from the blower housing. Unbolted cylinder/head from the crankcase. Installed the new piston ring. Reassembled the blower. The only problem was getting the new piston ring compressed enough that the piston could slide back into the cylinder. I used a worm type automotive hose clamp as a piston ring compressor.
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1 of 1 people found this instruction helpful
Tool Type:
Blower
Parts Used:
Cylinder - 530012541
Piston Ring - 545154001
Flywheel Assembly - 545221701
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Pliers, Socket set, Torx bits and allen wrenches
No start.......no attempt to start even with starting fluid. Compression was at minimums when I checked it.
Unit will have to be completely disassembled so remember (i.e. take pictures) as you go. Remove carb. and fuel tank at the same time and leave hose hooked to carb. Got to the other side and remove plastic cover over exhaust muffler and remove muffler, gasket and metal deflector. Remove carrying handle (2 screws) and the top plastic cover. At this time you can remove spark plug if you desire...........or you can wait until later.
Bottom side of unit............remove 3 screws covering and protecting fan and set cover and screw aside. Hold fan and remove nut, lock washer and large flat washer. Set this aside also. Remove fan duct and nozzle (4 screws) and set it aside. Now all that is left is the lower housing (4 screws) Remove screws and housing and set aside.
Flywheel is exposed at this point and (in this order) you will find a space and washer (washer is next to flywheel. Remove them and set aside. Gently work flywheel back and forth.......a little lubricant between shaft and flywheel will help. Shaft is tapered so it will come off with a little effort.
Next I took the two allen head bolts holding the cylinder head on. Set them aside and remove head. I removed the piston and rod assembly due to over-heating and or lack of proper lubricant in fuel. To remove the assembly the "black" cover (2 screws) on rear if engine block will have to be removed.
To reassemble everything is reverse from disassembly. I used RED Loctite on the cylinder bolts and BLUE Loctite on the Fan Nut and shaft.
Main culprit I found was the piston ring was frozen to the piston and the cylinder was scored. Compression was dismal and what I suspected was proven once the unit was disassemble.
Make sure you have a good supply or Torx screwdrivers and bits (various sizes) along with a good Allen Wrench set
Don't forget to watch for the gasket behind carb. It will come lose and may wind up on the floor when you remove the carb. Same goes for the exhaust.
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1 of 1 people found this instruction helpful
Tool Type:
Blower
Parts Used:
Piston Ring - 545154001
Kit - Gasket - 530069813
Muffler Cover Ass'y. - 530049879
Repair Difficulty:
Hard
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Pliers, Socket set
Blower wasn't getting compression
1. Took the assembly apart
2. Tested compression
3. With the poor compression, went to look at piston closer and broke piston ring in the process which must have been weak to begin with.
4. Ordered new piston rings and gasket kit to replace all the gaskets since engine assembly was taken apart.
5. Put together remaining assembly
6. Applied high temperature adhesive and let cure over a few days
7. Tried starting the blower and it ran great!
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1 of 1 people found this instruction helpful
Tool Type:
Blower
Parts Used:
Piston Ring - 545154001
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Socket set, Allen wrenches, ring compressor
Would not start, no compression
1 Removed engine
2 Removed cylinder head
3 Removed old piston ring
4 Installed new piston ring
5 Reassembled and reinstalled engine
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Tool Type:
Blower
Parts Used:
Cylinder - 530012541
Piston Ring - 545154001
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
, allen wrench
no compression
Total tear down to cylinder and piston. Had a scored cylinder and a stuck piston ring, which scored the cylinder. Replaced cylinder and cleaned groove for new piston ring, reassembled and fired right up. Had to adjust the carb jets to tune low and high rpm settings. Removing the cylinder was challenging, due to allen head bolts.
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Tool Type:
Blower
Parts Used:
Piston Ring - 545154001
O-Ring - Rear Plug Kit - 545180866
Repair Difficulty:
Medium
Time Spent Repairing:
More than 2 hours
Tools Used:
Screwdriver, Pliers, Nutdriver, impact wrench, Kroil, allen sockets
Low compression. Needed to replace the piston ring.
Followed a U tube video showing how to disassemble the FB 25 motor to replace an ignition coil. then I removed the cylinder ans replaced piston ring. hardest thing was to get the correct allen head tools. Go slow and lay out the parts so you can remember what bolts go with what assembly. And just do the work. When the old ring out, clean out the groove in the piston, check for scoring on the piston and cylinder [i had none]. Install the ring, add the new gasket, and slowly start replacing the parts in the reverse order you removed them. Everything worked when back together. It was do-it-myself or buy another one. A shop would charge too much for this job.
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Tool Type:
Blower
Parts Used:
Piston Ring - 545154001
Cylinder Kit - 530012381
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Pliers, Wrench Set, Sandpaper, file, wire brushes, air compressor
Old 2002 weed eater blower someone ran non mixed gas in .
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Tool Type:
Blower
Parts Used:
Piston Ring - 545154001
Cylinder - 530012500
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
, Alan ranches
Locked up
A new piston ring put a new head on it and need some gas lines and it will be done
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Tool Type:
Trimmer
Parts Used:
Piston Ring - 545154001
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers, Torx drivers
Low compression due to a broken ring.
1. Remove the black cover.
2. Remove the green cover and the trigger assembly.
3. Remove the trimmer shaft.
4. Remove the gas tank.
5. Remove the exhaust.
6. Remove the carb.
7. Remove the head.
8. Install the new ring.
9. Reassemble in reverse order.
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Tool Type:
Trimmer
Parts Used:
Piston Ring - 545154001
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Wrench Set
Piston ring broke hard to start
Removed piston and ring cleaned all lubed lightly with new grease, used newly purchased ring compressor, installed new ring and installed piston into cylinder reassembled everything else so far works fine
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Reviews
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  • fit well exact replacement
    New part, fit well, unfortunately I still have no compression. I've replaced the headgasket and the bottom end o ring, the carb and the coil. Guess I will buy a new one..
    Guest - October 15, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
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    Product Information
    Manufacturer: Poulan, Weed Eater, Husqvarna
    Product Number: 545154001
    Classification: Part
    Weight: 0.01 lbs.
    Shipping: Ships Worldwide
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