Medium
1-2 hours
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.
Piston Ring 545154001
OEM part for: Poulan, Weed Eater, Husqvarna, Craftsman
Part Number: 545154001
$4.99
In Stock
Ships within 1 business day 
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Product Description ?
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This Piston Ring will fit the following 471 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Poulan
Weed Eater
Husqvarna
Craftsman
Show More Compatible ModelsThis item works with the following types of products:
- Trimmer Parts
- Edger Parts
- Blower Parts
- Hedge Trimmer Parts
- Pruner Parts
This part replaces obsolete part #: 5300551-20, 530055120, 530049903
Customer Part Reviews ?
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- 1
moderately difficult to perform ring replacement part fit perfect engine spins like a top
part fit perfect and engine runs great
Guest -
October 5, 2022
Verified Purchase
Great Part
The piston ring arrived on time and was well packaged for shipping. The part fit and made all the difference in my engine performance! I recommend ereplacements for all of your parts needs!
Sean -
September 1, 2022
Verified Purchase
Spare Ring
Arrived as advertised.
Buddy -
September 9, 2020
Verified Purchase
Works great !
Shipping fast, good quality of parts, easy to replace, I replaced this piston ring combine with cylinder then my poulan weed eater runs like new..
Tri -
August 13, 2020
Verified Purchase
Right part
Haven't had a chance to install it yet. Shipping was delayed for quite a while but it was due to the usps having problems.
James -
June 12, 2020
Verified Purchase
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
Quality part and price but way too long to deliver
The part arrived way too late. I was able to get another from a different vendor and my trimmer was running by the time yours arrived . Your price, ring quality angry packaging were excellent. Thank you.
Gerard -
June 21, 2023
Verified Purchase
They broke.
I was trying to install them and they broke. I know this expected of pistol rings but I kind of sucks that I payed about $18 for both and they broke on installment. I was trying to close the block back together and thats when they broke.
Walton -
February 1, 2022
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Very low compression. The piston ring broke into 2 pieces.
Allan - August 28, 2017
👍 4 of 4 people found this instruction helpful
Tool Type
Blower
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Ring Compressor, Allen Wrench
Parts Used
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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No start.......no attempt to start even with starting fluid. Compression was at minimums when I checked it.
Jerry - July 12, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Torx bits and allen wrenches
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.
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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Blower wasn't getting compression
Kevin - October 9, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Blower
Difficulty
Hard
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set
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!
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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Would not start, no compression
Leo - January 1, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Allen wrenches, ring compressor
Parts Used
1 Removed engine
2 Removed cylinder head
3 Removed old piston ring
4 Installed new piston ring
5 Reassembled and reinstalled engine
2 Removed cylinder head
3 Removed old piston ring
4 Installed new piston ring
5 Reassembled and reinstalled engine
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Piston ring stuck. No compression.
Herman - December 8, 2022
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set
Parts Used
Disassembled blower motor, installed new piston and ring.
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no compression
Ron - September 18, 2022
Tool Type
Blower
Difficulty
Expert
Time
30-60 minutes
Tools Used
Screwdriver, torx drivers
Parts Used
replaced piston ring
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Low cylinder compression, carburetor fowling
Sean - August 31, 2022
Tool Type
Hedge Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Pliers, Allen wrench and T-handle
I disassembled the outer plastic housing to gain access to the motor. Once I had access to the motor I performed the disassembly in the following order:
Removed the carburetor and spacer, held in with two screws. Removed and replaced paper gaskets.
Removed the exhaust and heat shield, held in with two screws. Replaced exhaust gasket
Removed the cylinder, held in with two machined screws. Replaced rubber base gasket
Removed piston assembly and ring.
Cleaned and checked the piston and cylinder bore for gouges. Removed and replaced cylinder ring.
Reassembled in reverse order.
Removed the carburetor and spacer, held in with two screws. Removed and replaced paper gaskets.
Removed the exhaust and heat shield, held in with two screws. Replaced exhaust gasket
Removed the cylinder, held in with two machined screws. Replaced rubber base gasket
Removed piston assembly and ring.
Cleaned and checked the piston and cylinder bore for gouges. Removed and replaced cylinder ring.
Reassembled in reverse order.
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No compression
John - January 26, 2022
Tool Type
Blower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, allen wrench
Parts Used
disassembled blower
removed old piston ring
cleaned piston ring groove
installed new piston ring
reassembled blower
removed old piston ring
cleaned piston ring groove
installed new piston ring
reassembled blower
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low compression
Gary - November 17, 2021
Tool Type
Blower
Difficulty
Easy
Time
30-60 minutes
Tools Used
, dont remember tourqe drive size.
Parts Used
Stuck ring in craftsman 358-797342 vac/blower with low compression. Ordered and replaced ring, and brought compression up to 90psi. Starts on one to two pulls now. With a new carb, runs like new. All I did was replace the single ring. Did not hone out the cylinder and did not replace piston.
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Old, Used, and bolts loosened over time.
Ronald - September 4, 2021
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
, Torq tips
time to complete, well I wasn't in a hurry but took a few hours.
Steps:
clean parts swap the new o-rings/gaskets and the new piston ring,, lock tight bolts and hope they hold over time.
Note: piston ring breaks during disassemply so just pick it out and take a broken piece to use to scrap and clean the ring groove.
Steps:
clean parts swap the new o-rings/gaskets and the new piston ring,, lock tight bolts and hope they hold over time.
Note: piston ring breaks during disassemply so just pick it out and take a broken piece to use to scrap and clean the ring groove.
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Thanks for voting and helping fellow customers!
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Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
