This replacement piston ring is a high quality item that is sourced from original equipment manufacturer for use on Craftsman gas powered lawn and garden equipment. A worn or broken piston ring will allow combustion gases to escape the seal and enter the crankcase causing low compression and the loss of power. If compression is reduced significantly, the engine will not be able to run at all. Please note one durable metal piston ring is included per order requiring a wrench set and pliers to complete the repair.
Piston Ring 545154009
OEM part for: Poulan, Weed Eater, Craftsman, Jonsered, Husqvarna
Part Number: 545154009
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Product Description ?
- OD 1-3/8"
- ID 1-2/8"
- Classification: Part
- Weight: 0.01 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This part will fit the following 145 machines
Poulan
Weed Eater
Craftsman
Jonsered
Husqvarna
This item works with the following types of products:
- Trimmer Parts
- Edger Parts
- Hedge Trimmer Parts
- Blower Parts
This part replaces obsolete part #: 530012472, 530053565
Customer Part Reviews ?
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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.
Stuck ring on piston
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Socket set, Adjustable Wrench, torx
Parts Used
The most difficult job was removing the stuck ring.
Cylinder head bolts came out
Tool Type
Blower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Nutdriver
Parts Used
Remove plastic engine cover and disconnect spark plug wire.
Remove carburetor.
You can leave the fuel hoses connected, just swing carb to the side.
Remove exhaust header by removing two torx screws.
Remove two cylinder Allen head bolts. In my case one had backed all the way out.
Lift cylinder head straight up. At that time you can see the piston.
Replace the head gasket (small o-ring type).
Remove old piston ring and clean ring groove with rag and something like brake cleaner.
Carefully expand the new piston ring and begin fitting it into the groove. For my Poulan leaf blower there's a small pin in the ring groove. The split will need to fit onto one of these pins. You'll also note that the end of the piston ring is slightly rounded on the bottom. That rounded portion fits over the pin. To verify its on correctly, compress the ring and ensure it will compress to the size of the piston.
After the ring is correctly installed on the piston and head o-ring is in place, place some oil on the ring and bottom of the cylinder. This will aid in inserting the piston back into the cylinder head.
Hold the piston up as high as possible with two fingers, and begin pushing the cylinder down onto the piston. Using a slight side to side motion the cylinder should slide down over the piston. Don't force it. If it doesn't slide on with some moderate pressure stop and check to ensure you have the ring on properly.
Another option si to remove the piston and piston rod. This is easily done by remove a plastic cover with two torx screws on the outside of the engine. With that remove the piston rod will slide off of the engine shaft. This will allow you to flip the cylinder upside down and insert the piston. In this position, it's easier to compress the ring with your fingers or a plastic screw driver (don't scratch anything).
When it's on, put everything back together in reverse order of above.
Stuck piston ring
Tool Type
Blower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Allen wrench, torx wrench
Parts Used
2. Removed the carb assembly.
3. Removed the exhaust unit.
4. Removed the crankcase side cover.
5. Removed the ignition plug wire
6. Removed the cylinder unit.
7. Removed the piston assembly.
8. Removed the damaged piston ring.
9. Cleaned the piston ring groove and the piston unit.
10. Inspected and cleaned all components.
11. Assembled the complete blower in reverse order.
12. Put in fresh fuel and successfully tested the blower.
Chainsaw was difficult to start especially when hot.
Tool Type
Trimmer
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Wrench Set, Hex (Allen wrench) & Star head screwdriver, Scotch-Brite pad
Parts Used
After a few years my chainsaw was difficult to start especially when hot. Disassembly was relatively easy using tools made for hex and star shaped screws. After removing the cylinder head (access the 2 hex screws through the holes with an Allen wrench) and slipping the connecting rod off the crank, I found the ring compressed by heavy carbon deposits. Heavy carbon deposits on the piston and head walls were removed using a Scotch-Brite pad. Soaking the piston/ring in Marvel Mystery oil released the ring from the piston groove. After installing the new ring (making certain the ring split was positioned to the intake side) and reassembly, the old chainsaw runs like new.
Very hard to start
Tool Type
Blower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Power Drill, Socket set, Wrench Set, Nutdriver, used broken ring to clean piston groove
No compression.
Tool Type
Blower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Plug wrench
Parts Used
It would not start. The piston wring was burned and compressed inside the groove
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Nutdriver, Alen wrench
Parts Used
While trying to start fuel would blow out the muffler, the ring was stuck with oil build up
Tool Type
Blower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set, alin wrench
Parts Used
Blower would not start after being unused over winter
Tool Type
Blower
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, hex keys, utility knife, torx bits
2. I replaced the carburetor and checked the spark (good) - still not starting
3. I removed the muffler to check for spark screen blockage, carbon buildup between engine and muffler, and to inspect the piston/ring. I tried starting it in this condition - still not starting
4. I finally decided that the piston ring might be stuck. I removed the cylinder and the crankcase cover, pulled the piston and rod off the crank shaft, and verified the ring was stuck in the grove with carbon.
5. I tried to free the ring with a utility knife cutting around the ring/grove but I broke the ring when trying to pry it out. Should have spent more time trying to free it.
6. I ordered a replacement ring and spare (in case I broke the first one installing it) and some case screws which missing from ereplacementparts.com.
7. After the parts arrived I sprayed the piston with lubricant and slid the new ring into place. I then sprayed the inside of the cylinder and rod's crank bearing with lubricant and reassembled the engine.
8. I reinstalled the blower's case, added fuel, and got it to start.
Success! This was my first time doing repair work on a small engine and ereplacementparts.com had what I needed and the order turn around time/price was good.
Stuck piston ring
Tool Type
Blower
Difficulty
Easy
Time
1-2 hours
Tools Used
, Allen wrench, torx wrench
Parts Used
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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.