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Repair Parts Home  Lawn Equipment Parts  Ryobi Parts  690161005 Piston Ring 30CC

Piston Ring 30CC

Part Number: 690161005
RyobiHomelite
Availability: 7 in stock
Price: $2.99
Quantity:
Ships within 1 business day

*This part replaces obsolete part #: 3179, 03179 and UP03837.

Description:
This replacement piston ring is a high quality manufacturer sourced replacement part that is specially designed for use with Homelite and Ryobi handheld lawn and garden equipment. It is used to provide a seal between the piston and the cylinder walls. If this part wears your tool will not be able to operate as intended. Please note one durable metal piston ring is included per order.
Product Information
Manufacturer: Ryobi, Homelite
Product Number: 690161005
Classification: Part
Weight: 0.01 lbs.
Shipping: Ships Worldwide
Related Products
Compatibility

This part is compatible with the following machines:

Ryobi
Homelite

Products Compatibility

This item works with the following types of products:

  • • Blower
  • • Chain Saw
  • • Pruner
  • • Saw
  • • Trimmer
Questions & Answers

Is it possible to find piston ring 1 5/16 for this model trimmer anywhere? Yr. 08/03 I'm pretty sure...? Thank you.
John for model number UT20763
Hello John, thank you for your inquiry! I apologize but the piston ring for your model UT20763 has been discontinued with no alternative or substitute available.
Repair Instructions: Submitted by Customers Like You
1 of 1 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Gasket - 900954001
Cylinder Gasket - 900953001
Piston Ring 30CC - 690161005
Carburetor Gasket - 984834001
Intake Gasket - 985248001
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers, Socket set, Torx drives
Low compression, wouldn't start
1. Disassembled clutch and powerhead
2. Removed piston rings,
3. Cleaned piston and installed new rings
4. Lubricated piston, rings and wrist pin bearing
5. Cleaned all gasket surfaces and installed new gaskets
6. Reassembled power head and clutch assy
7. Compression restored and trimmer runs great
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1 of 1 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Cylinder Gasket - 900953001
Piston Ring 30CC - 690161005
Repair Difficulty:
Expert
Time Spent Repairing:
More than 2 hours
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set, Nutdriver, Cylinder bore hone; Red Scotch Bright pad, cleaning Solvent
Blue Exhaust Smoke
Disassembled trimmer shaft assembly from motor assembly.
Disassembled motor, leaving flywheel and magneto in place, and then removed cylinder jug with piston in place.
Removed piston and push rod assembly from cylinder but did NOT disassemble connecting rod from piston as it was not necessary for this repair.
Completely cleaned and inspected ALL parts, paying particular attention to cleaning the roller bearing in the connecting rod to the crankshaft.
Lightly honed cylinder bore to remove carbon deposits. I could not do a thorough honing to the cylinder wall due to intake and exhaust passages. I used a brake cylinder hone for this task and I feared damaging these passages and the honing stones. I did use a variable-speed battery-powered drill to turn the hone but was careful to keep the stones inside piston-running area and away from the passages.
Removed old piston rings; cleaned off all carbon deposits from piston head and removed oil varnish deposits from piston side with Scotch Bright pad until bright.
Installed new piston rings.
Applied light coat STP oil treatment to piston, rings, cylinder wall and roller bearing, and CAREFULLY reinserted piston assembly back into cylinder jug.
Replaced all gaskets.
Reassembled motor.
Reassembled motor to trimmer shaft assembly.
Started and adjusted fuel/air mixture.
At this time there is no notable exhaust blue smoke.
This job requires more than just rudimentary skills and knowledge because you'll be working with a piston, rings and a cylinder. One tool you really won't need for this job is a torque wrench. It will be very helpful to also have a printed exploded-view parts diagram to help in parts orientation during reassembly. (I had to obtain and print a much clearer copy from another website - the one from the parts list on ereplacementparts.com is of poor quality). You'll also need a safe cleaning solvent and brushes, protective gloves, eye protection and a well-ventilated work area, and insure you have a fire extinguisher nearby while working with solvent. I also recommend having adequate bench space and parts bags or boxes. I used Ziploc Snack Bags for the removed hardware and I labeled them with a Sharpie pen.
Okay. Good luck and have fun.
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1 of 1 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Carburetor Gasket - 9071103
Gasket - 900954001
Cylinder Gasket - 900953001
Tank Insulation Gasket - 900999002
Piston Ring 30CC - 690161005
Air Filter - 5687301
Carburetor Gasket - 984834001
Muffler Gasket - 900994006
Intake Gasket - 985248001
Repair Difficulty:
Medium
Time Spent Repairing:
More than 2 hours
Tools Used:
Pliers, Power Drill, Socket set, Nutdriver
Gas/oil mixture leak. hard to start.
I basically rebuilt the trimmer, replacing all available gaskets and fuel lines and filter. I also removed some carbon buildup from the top of the piston and inside the combustion area. I found a damaged clutch during the breakdown and was lucky enough to find one elsewhere since it is a discontinued part. I viewed some repair tutorials from ereplacementparts for areas where I wasn't sure what to do, like, how to remove the drum and broken clutch. Which I needed to purchase a new tool for. A 4" T-25 driver. They were very simple to understand as well as the useful knowledge they contained.

My Ryobi is 11 years old this year with me as the only owner and now its runs like new again.
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Tool Type:
Trimmer
Parts Used:
Cylinder Gasket - 900953001
Piston Ring 30CC - 690161005
Cylinder, 30CC - 640841008
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Socket set, Wrench Set, Nutdriver
Piston froze in cylinder
10 year old Ryobi
Took engine off from unit
2 Cleaned unit and engine
3 Freed piston from cylinder
4.Removed cylinder from unit and piston
5.Check wear and connecting rod , crank
6.Removed piston rings from connecting rod and installed new piston rings
7.Installed cylinder engine base and reassembled, tested .
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Tool Type:
Blower
Parts Used:
Piston Ring 30CC - 690161005
Cylinder Gasket - V100000160
Piston Ring - A101000090
Thumb Screw - V299000250
Air Cleaner Lid - A232001850
Piston Ring - 545154001
Air Filter - 530049383
Gasket Kit - 530069813
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers, Power Drill, Socket set, Wrench Set, Nutdriver, Allen wrenches
Working on multiple machines one more carburetor issues replacing rings and three of them
Carefully disassembled engine replace rings on the piston carefully reassembled engine amazing how simple it was and how well this leaf blower worked after repair
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