Mercury outboard engine dies after warm up when I push choke in

Question edited for clarity, 'year make model (what it is)'.
Question moved from Honda Cars.

https://www.seaseamarine.com/products/honda-marine-mid-size-outboard-bf50

In the same way as cars are fuel injected and completely electronically driven, you have to take them to a dealer and they put them on a scan tool computer. That diagnoses all the systems and tells where the problem is.

If the problem clears after 10 minutes and warming up, it is likely a fuel injector issue. Check the spark plugs and leads. Or the choke is sticking and then comes unstuck. I have never used the choke on my Mercury 60.

https://www.google.com/search?q=honda+50bf+run+rough+for+10+minutes

The guy in the video is Kyle Noseworthy, and he is also a great knifemaker. He sharpened 4 knives for me. Not sure if the video will help, but it is the only one on that engine.

Hello, everyone.
The engine is generally healthy and what bugs me the most, has JUST been overhauled by a good mechanic, which included cleaning the carb, after which it started on 1-3 pulls and ran like magic.
Today I went fishing for the first time after not using the boat for about 3 weeks. The engine started fine (with 2/3 choke), I let it warm up a bit, with little-to-none choke. Idle was a tiny bit rough, but nothing major. When I set it on idle for the first time, it ran for about 3 minutes and died. Since then I could only start it with either choke or some throttle and it'd always die quite soon on idle or close to idle. When I try to start it warm with no choke, it'd sound as if it catches and dies off immediately.
The plugs are 1 month old and adjusted, oil's in order, no detectable problems with the prop or anything else.

I have a suspicion it might be either condensate or some grit in the fuel tank, which was stored in a rather damp place for 3 weeks, half full (although tightly closed). What should I check and is there a way to condition the fuel somehow to remove condensate and clean out eventual b/s from the carb without major mechanical work (I really don't want to pull the boat ashore before autumn)?

Thank you!

check fuel filter, an for vacuum leaks at carb

renew spark plugs,mix up some fresh fuel,put choke on,throttle set at just above idle,pump up fuel bulb by hand till tight,put outboard in a water drum,try pulling or turning on starter till it fires,then push choke in and restart

I have a 25 hp merc outboard that starts right up but idles high then low and when running it just dies . Is it a choke problem?

have you left the choke open ? this mixes more fuel to the engine upon starting but will stall it if left open too long . check your fuel filter too it may be full of debris.

Be sure to run the recommended fuel mix. most modern 2 stroke outboard engines run on 100 to 1, some times the mix is on a decal inside the cowl.

Cheers, Timo.

Use it .It is a common thing with 2 strokes.Outboards have water in them and cool down quicker than say a 2 stroke motorbike. They have no water and keep the heat in the engine longer.If it runs well,,don't spend the money.All the choke does is gives the motor a slightly richer air/fuel mix at startup.It cannot hurt the motor.Hope this helps

Adjust your idle mixture screw. If that doesnt work then run the engine at high rpm's and push the choke in until it is about to die and let off. This will create a vaccuum in the carb and possibly **** out any particles in your jets. If that doesnt work then I would rebuild the carbs.

hi take the prop off see if there is anything /string/ between the hub and the housing check oil lvel in g/box /is gear box nice and free if all is ok try it in ware with just a small amount of choke
drain /empty fuel out replace with fresh /correct oil mix
check /change fuel filter/air filter
warm engine up check idle mixture ajustment/tick over speed
increase idle speed slightly/7/800 rpm
hope this helps merlin v 12