I have a 3w106 that it works just awesome, however it takes a little bit to warm up. that is to reach a perfect idle and transition from idle to WOT it takes about 15-30 seconds. if it is too lean, is it the low end that i have to open?
thank you

All gas engines you should wait until warm up at least 30 seconds , must is the engine is a 3w.

If after one minute you engine have a good transition and power your 3W is perfect just enjoy it.

Oscar Silfa

it is cold here, and i thought that i needed to richen up the low end a bit to make this issue go.
i just do not want to ruin these beautifull engine

The rather obvious answer is why don't you try opening the low end needle a tad and see what happens. A slow warm-up and problems with transition CAN be a sign of slightly lean running, but it may just be that engine.

Gerry, do you mean a lean low end... and to answer your question i am somewhat new petrol engines and i am the only petrol flyer on my island so i do not have people to consult, or give me advise. it took me quite a bit of time to get the engine running this well, so i am affraid that if i touch it without the need i will make things worse[:-]

I wold recommend that you let the engine warm up on the ground and get in the air and make a couple of passes before you start doing anything wicked.

after it warms up it is a dream! that is why i am very reluctant to touch it...but i just wanted to make sure
thank you

I saw a guy break his crank and he made the assumption (right or wrong) that it is because he started his plane, got in the air, and began doing maneuvers without a proper warm up.

Fc-26

Your adjustment is okey,i have 4 engines 3W and when is cold the transition from low to high is slow and when the engine is new take a litle more time.
Don't touch your neddle and fly.Is possible that the low neddle is a little rich but if your engine is new just fly.
when you are going to fly start your engine and wait one minute until he take temperture and warm up.
How many flys do you have with that engine?

Oscar Silfa

just one gallon in a h9 cap 232 flown very very easy

FC

It's normal for a gas engine to react as you describe when the engine is cold. In fact I have mentioned in the past. This is a good indicator the engine is properly tuned on the low end, providing the engine responds and runs well once its warmed up.

I guess we are all providing sage advice without asking the relevant questions. (OK - It never stopped us before!)

Just how long are you leaving it to warm up and what temperature are you starting it at? It's going to take a lot longer to warm up if it's 40 degrees out, compared to 70 or more. In Florida, where we don't fly often it it's below 70, 30 seconds to 1 minute will be enough. If it's something like 2-3 minutes you have problem. I always warm up the engine at a fast idle. It will take an age at full idle to come up to fulll operating temperature. What are your conditions anyway?

my temp is from the mid 30's to the mid 40's. And it will take about 1 minute to 1.5 to warm up the engine so it will not die when i advance the throttle, but then i have no issues at all.

Ah-Ha! What your seeing is absolutely normal. Just give is a nice long warm up at fast idle like you are doing and then you are on your way. There's nothing wrong with that engine. BUT - why are you out flying in that sort of weather?????????? Yuck!

well this kind of temps are mild for us, besides this keeps people away from the field . I would love to be in FL, NM, AZ CA but my job and family are here... hum.... do you know a company that needs a Metwork engineer...