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Description
16620-Z8D-305 Thermo Wax Assembly & 16600-Z8B-900 Choke Control - Fits Honda GCV160 GCV160A0 GCV160LA0 GCV19016620 Z8D 305 Thermo Wax, 16600 Z8B 900 Choke Control, and 16950 Z0Y 003 Fuel Valve Kit Key Features Complete automatic choke restoration kit designed to regulate engine startup behavior based on operating temperature. Thermo wax assembly utilizes precise thermal expansion properties to actuate the carburetor choke valve automatically without manual user adjustment. Mechanical choke control linkage plate ensures crisp, unhindered movement of the choke
16620-Z8D-305 Thermo Wax, 16600-Z8B-900 Choke Control, and 16950-Z0Y-003 Fuel Valve Kit
Key Features
- Complete automatic choke restoration kit designed to regulate engine startup behavior based on operating temperature.
- Thermo wax assembly utilizes precise thermal expansion properties to actuate the carburetor choke valve automatically without manual user adjustment.
- Mechanical choke control linkage plate ensures crisp, unhindered movement of the choke butterfly valve.
- In-line fuel shut-off valve features a fuel-resistant internal seal to completely cut off fuel supply during storage, maintenance, or transportation.
- Engineered to factory specifications to eliminate hard starting, rough idling, and black exhaust smoke caused by improper air-fuel ratios.
Replaces / Cross-Reference Part Numbers
- 16620-Z8D-305 - Thermo Wax Assembly: 16620-Z8D-305, 16620-Z8D-841, 16620-Z8D-842, 16620-Z9L-003
- 16600-Z8B-900 - Choke Control: 16600-Z8B-900
- 16950-Z0Y-003 - Fuel Shut-Off Valve: 16950-Z0Y-003
Compatibility & Fitment
- Compatible with Honda four-stroke overhead cam small engines.
- Fits specific engine models including: GCV160, GCV160A0, GCV160LA0, and GCV190.
- Fits Honda walk-behind lawn mower models including: HRR216 and HRX217.
When to Replace
- The lawn mower engine is extremely difficult to start from a cold rest or bogs down immediately after cranking.
- The choke plate stays permanently closed or open, leading to fuel flooding or an overly lean running condition.
- The thermo wax actuator cylinder pin is seized, bent, or fails to extend as the engine reaches operating temperature.
- Fuel continuously drips from the body of the fuel petcock switch or bypasses the valve when turned to the off position.
Installation Tips
- Disconnect the spark plug wire and allow the engine to cool down completely before handling fuel or mechanical linkages.
- Clamp the main fuel lines using line-clamping pliers or drain the gasoline tank entirely into an approved container before swapping the fuel shut-off valve.
- Take a digital photograph of the return spring and choke linkage orientation prior to disassembly to ensure accurate reinstallation alignment.
- Ensure the thermo wax capsule sits completely flush within its designated mounting bracket slot on the engine assembly to prevent binding.
- Manually cycle the choke control mechanism after final bolt tightening to verify the linkages move smoothly through their full range of motion.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Great quality pillows. Very difficult wrapping.
Color: White, Size: King (Pack of 2)
The Pillows are the real deal. Very fluffy but with good support. I was surprised by the weight of the box they came in, pretty heavy so you know there’s good quality pillows inside.
The one negative is that the pillows are packed in very very tight plastic because they come compressed. But the thing is, it’s really a chore to open them. You have to be careful not to cut through the plastic to the material, but the plastic is put on so incredibly tight that it’s even hard to get your finger underneath.
But I found a way to open them. Near the top, insert A very flat metal ruler as far in as you could get it. Then cut through the plastic that’s above the metal ruler. That prevents a sharp tool from damaging the pillows. As you get through the plastic above the ruler, keep pushing the ruler further down into the package. Believe me, this simplifies what could be a very difficult unpacking. I am very surprised that the company that makes them does not insert the type of opener that you find on boxes you receive in the mail or even packages that you get from the grocery store where you just pull a tab and that opens the package.
These are really good pillows, but you must be very careful about using a sharp object when opening the box and when trying to cut through the plastic. I am a strong man and have the tools needed, a very flat metal ruler, and a box cutter, knife, or razor. Good luck. !!
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Reviewed in the United States on May 5, 2026
★★★★★ 5
These hold up very well
Color: White, Size: Standard (Pack of 2)
I have NO luck with pillows. I’ve been in stores & tried them. They seemed ok there. At home, nope. I’ve been getting headaches & neck aches from lousy pillows. I’ll change one, a few nights relief. It doesn’t help that I’m prone to headaches. After reading about different pillows, I settled on these. The reviews were better than so many different ones I was looking at. Including high priced & brand names. I bought the standard size. When I saw, “Customers Usually Keep This”, I kept my fingers crossed. When I received them, I took one out of the package & put my head on it & thought, oh no! This is too hard! I tried it again. Ok….. I slept on it & haven’t had any pains since. It’s soft but firm enough to keep my head from sinking & messing up my neck. I don’t move. No more flipping my pillow over. My head doesn’t go below my neck anymore! This has been 2 months now, but it hasn’t changed at all. I wake up happy, not complaining. No more pains or headaches. This saved me from losing days with a heating pad or an ice pack. The price was excellent for 2 pillows. I can’t believe a blind buy was the answer! These are incredible. Finally, something worked for me.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Awesome Pillows!
Color: White, Size: King (Pack of 2)
These pillows are super soft! I love them. I bought them when I caught a bad cold and needed to prop myself up. Worked so great! Definitely give these pillows a try. They're very reasonably priced too.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Great pillows
Size: King - 20"*34" (pack of 2), Color: Grey
Very luxurious and comfortable! Exactly as described and priced well.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Perfect Stylish Comfy Queen Size Pillows
Size: Queen - 20"*30" (pack of 2), Color: Grey
These two pillows replaced some very old pillows. They are perfect size for my son’s double bed. They come rolled up and when I removed the plastic they puffed right up to their puffy pillowy size. They are extremely comfortable and my son loves them. They are a down alternative and work perfect for him as he is a stomach sleeper. They have just the right support for a restful nights sleep. They have a nice stylish look 👀. They keep their fluffiness even after sleeping on them overnight. They can be washed in cold water and tumbled dry on low heat. They are the perfect pillows for our family. Extremely happy with our purchase. I highly recommend them. ⭐️⭐️⭐️⭐️⭐️
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Reviewed in the United States on April 17, 2026