$13.51
Save $1.22
was $14.73
Buy Now, Pay Later
As low as
$3
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Nov 4 – Nov 5
At a glance
- Condition
- New
- Size
- Stihl SG20 size
- Exterior Finish
- Stainless Steel
- Inlet Connection Type
- Compression
- Set Name
- True
- Thread Size
- 1/4 in
- Valve Type
- Piston Valve
Features 1
- Compatible with Stihl SG20 Backpack Sprayer
Specs 19
| Brand | MOTOKU |
|---|---|
| Exterior Finish | Stainless Steel |
| Inlet Connection Type | Compression |
| Outlet Connection Type | Compression |
| Number of Ports | 2 |
| Number of Packs | 1 |
| Unit Count | 1 Count |
| Manufacturer | MOTOKU |
| Number of Items | 1 |
| Brand Name | MOTOKU |
| Model Number | 4 |
| Number of Pieces | 1 |
| Set Name | True |
| Manufacturer Part Number | 4 |
| Thread Size | 1/4 inch |
| Thread Type | Compression |
| Connector Type | Compression |
| Valve Type | Piston Valve |
| Size | Stihl SG20 size |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 4 – Nov 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Top Amazon Reviews
Works
Size: Stihl SG20 size
Fit my stihl backpack sprayer perfect. Old piston had broken in two pieces. Got me working again
Reviewed in the United States on August 10, 2025 by Kyle Gerhart
Simple install
Size: Stihl SG20 size
Easy to install and made a definite difference.
Reviewed in the United States on July 27, 2025 by Rod
My sprayer works
Size: Stihl SG20 size
It works
Reviewed in the United States on July 11, 2026 by Lee Musser
Just what I ordered
Size: Stihl SG20 size
Worked
Reviewed in the United States on April 2, 2025 by Amazon Customer
It fixed the pump...but.....
Size: Stihl SG20 size
Ok, it repaired the pump...but..... NO ONE ANYWHERE tells you how to replace the piston. Google, YouTube, etc, no one mentions this. They are not threaded so I'm guessing it's just pressed on to the shaft. No instructions included either. I used some digital calipers and the old piston vs the one shipped were close enough so I put the felt washer thing on and the new O-ring on and after reassembly it works. I coated the O-ring with some lightweight oil to help it slide into the pump tube. Next time? I'll just go to a good NAPA store and buy a new O-ring, probably a couple of bucks. Lesson learned!
...
show more
Reviewed in the United States on May 19, 2025 by Jerry
works
Size: Stihl SG20 size
seems to work pretty good and has held up well with a steady flow of usage since i replaced the black rubber o ring. i do stay current with recommendations from Manufacturers the lubricant to maximize the efficiency of the product overall woukd recommend fl
Reviewed in the United States on May 18, 2024 by Mr. Mr
Worked for the purpose
Size: Stihl SG20 size
like advertised
Reviewed in the United States on August 27, 2024 by jimmie gibson
GREAT!
Size: Stihl SG20 size
amazing product. big difference changing your filters. nice and efficient. works like a charm.
Reviewed in the United States on September 5, 2025 by Rocio Barboza