- This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
- New stock is on the way! On order parts usually ship within 7 business days.
- Item is not in stock and usually ships 10-15 business days from the time you place your order.
- This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
Product Description
?This replacement piston ring is an authentic OEM sourced component which is specially produced for use with Tanaka gas-powered lawn and garden equipment. A worn or a 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. Please note this high-quality part is made of durable metal and it is sold individually.
Troubleshooting
This part works with the following brands:
- Tanaka
This part works with the following products:
- Trimmer
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Customer Part Reviews
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Gamefisher 1.2. Rings work
put in new rings and all is good fit perfectly.
Guest - September 11, 2020
Verified Purchase
Broken
I ordered 2 rings and one of them arrived broken
Guest - May 20, 2019
Verified Purchase

May 20, 2019
Hello Shawn , Thank you for leaving a review on the part ordered. Checking the order I am showing you have already contacted us to address the issue. Please let us know if there is anything else we can assist you with.
Fool me once, shame on you, fool me twice, shame on me
These rings had too much slop, they were slightly larger than the piston. Not sure why because it was the required part number. Needless to say, they both broke.
Guest - July 3, 2019
Verified Purchase

July 3, 2019
Hi Dan,
Thank you for your review. Please accept our apologies that the parts you received were not the correct size and that they broke. We have contacted you privately regarding this situation.
Shipping slow!
My item is sitting in my mailbox and you already want a review. I ordered these parts months ago, and I dont even have them in my possession yet.
Iglobal - September 26, 2019
Verified Purchase
Model Cross Reference
This part works with the following models:
ERP Number: ERP9990944
Manufacturer Part Number: 6686116
Manufacturer Part Number: 6686116
| Brand | Model Number | Description |
|---|---|---|
| Tanaka | AST-210 | Trimmer - AutoStart Trimmer |
| Tanaka | AST-5000 | Trimmer - AutoStart Trimmer |
| Tanaka | AST-7000S | Trimmer - AutoStart Brush Cutter |
| Tanaka | QBM-23 | Engine - Bicycle Engine |
| Tanaka | QBM-23N | Engine - Bicycle Engine |
| Tanaka | QBM-23NA | Engine - Bicycle Engine |
| Tanaka | QCP-121 | Water Pump - Centrifugal Pump |
| Tanaka | TBC-202 | Trimmer - Trimmer / Brush Cutter |
| Tanaka | TBC-4000 | Trimmer - Brush Cutter |
| Tanaka | TBC-4500 | Trimmer - Brush Cutter |
| Tanaka | TBC-5000 | Trimmer - Trimmer / Brush Cutter |
| Tanaka | TED-210 | Gas Engine Drill - Gas Drill |
| Tanaka | TED-210C | Gas Engine Drill - Gas Drill |
| Tanaka | THT-200 | Hedge Trimmer - Hedge Trimmer |
| Tanaka | THT-230 | Hedge Trimmer - Hedge Trimmer |
| Tanaka | TST-218 | Trimmer - Telescopic Shaft Trimmer |
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
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