Honda 16620-Z8D-305 Thermo Wax Assembly

This product is 11$ in the USA which is less than £10 here so £19.99 seems a bit excessive 🤔

Very happy And well pleased

All good

I'll probably buy an extra to keep in the garage for when this one goes out.

Comes in a Honda bag and works perfectly. Took a little time to arrive but this was as specified on the original order.

This is one of the most ridiculous ideas Honda as ever come up with the lawn mower is only four years old and this is the third one that I better replace will never buy another honda mower while they still have this on them I bought this mower because I had honda mowers in the past and they started first time but this choke does not work why change from the old system when it worked.?

It initially worked very well completely curing the poor starting but, after 4 weeks the same old problem recurred. On investigation I found that the piston from the wax capsule was fully extended and would not return to the ‘cold’ position - I.e. knackered. I have complained to the seller, but so far have had no reply.

Excellent product

Works perfect

Works great, Mower won't start when this small part fails.

Servi pour moteur honda, marche très bien.

good product

If you have a Honda engine (in this case, a 4-5 year old mower with Honda engine model GCV160) and are stumped trying to figure out how your once reliable, 1 pull to start up engine now requires many more, hot or cold, or won’t keep running once started (to include rough running / surging) this part is commonly the culprit. This part has everything to do with the “auto-choke” design of the engine, but can affect running performance, too. They wear out/ fail pretty frequently.Before you take apart your carb or replace spark plugs, etc. , remove your air filter element and check to see if the carb air intake valve is fully closed (as it should be with engine cold as shown in my pic), or if it is stuck partially open.Inside this part is a wax compound that expands/contracts with engine heat, and controls a small pin-like rod in its center. The pin contacts part of the carb intake air valve control arm.Engine cold = pin retracted and permits air intake valve to fully close (aka full choke).Engine hot = pin extended and prevents choke from being on, which isn’t generally needed to restart a warm engine.These pins usually fail to retract and just plain get stuck in one position, creating havoc for all things choke, idle, and running related. In my pics, you can clearly see how the pin of the old one is just stuck extended out a bit. This mower made its way into my shop because it suddenly required 7-10 pulls to start and surged once running, when a few weeks earlier all was fine with it.Shop manual references using a thermal paste on the body of the new part when installing. I never have and never had issues. Pics I included should help those unfamiliar with the parts location on engine. Getting the old one out frequently requires use of a needle nose vise grip pliers and a fair amount of wiggling. The aforementioned mower also surged badly until fully warmed up, and occasionally thereafter. Upon replacement of this part, engine is back to 1 pull to start and no surging issues.