Medium
More than 2 hours
This replacement piston ring is a high-quality item that is sourced from original equipment manufacturer for use with Makita power cutter saws. A worn or broken piston ring will allow combustion gasses 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 this durable metal piston ring is sold individually.
Piston Ring, 257377-6
OEM part for: Makita
Part Number: 257377-6
$31.79
In Stock
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Compatibility
This part will fit the following 25 machines
Makita
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Show More Compatible Models
This item works with the following types of products:
- Chain Saw Parts
- Saw Parts
This part replaces obsolete part #: 394-132-020
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Perfect fit
Solved my problem and the rebuild was easy.
Your site makes it really easy to find the right parts.
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December 1, 2022
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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.
Saw would not start due to lack of vacuum and compression .
james - May 8, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Concrete Saw
Difficulty
Medium
Time
More than 2 hours
Tools Used
, Torx drver
Disassemble saw removed cylinder head . Removed piston from rod . After receiving replacement piston and ring . Hond inside of cylinder head with a honing tool used battery drill to spin tool. Cleaned inside the head to remove grit . Checked for guage in walls. After inspection I installed new piston on rod installed piston in cylinder head very carefully .used lubricant to help with process. Once inserted I reassemble saw . Used a heavier oil ratio for break-in. So far it has worked well for me. Saved myself 834.00 dollars yea
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Ring gap almost 1/8"-no compression.
Carl - June 2, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Concrete Saw
Difficulty
Medium
Time
1-2 hours
Tools Used
, torx wrenches
Parts Used
Tear down to remove cylinder head from piston. Remove old ring; inspect piston and cylinder for damage-both good; clean ring groove on piston; install new ring; install piston back into cylinder head; install cylinder head bolts; assemble rest of components; add fresh mix; startup and run; starts and runs good.
Special instructions-pay attention to how all the parts came apart so they go back together in an orderly manner.
Special instructions-pay attention to how all the parts came apart so they go back together in an orderly manner.
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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.
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