Ok I saw this early today and been thinking. The first carb did this to but had dry o rings so bought 2nd new carb and still same. It starts and runs if you prime or enrich the mixture and restarts but after cool down needs enriched again to start and run. Ok it restarts cas it's hot and doesnt need the enriched mixture so somewhere it's not pulling the choked fuel in to start normal. Like not enough vacuum to pull it.
Try what Tony said and cover the carb and see if it trys to start better than just holding choke closed I'm betting it will try and fail maybe a little better than just hand on choke butterfly. It does sound like a vac leak something you had before the carb replacement. Just enough to not start cold but run hot. I'll bet when it does start an running it's way lean.you could pull a plug and see the color of plug.
If it is you've got to find the leak, gas in q spray bottle can sometimes work but you have to be careful VERY CARFUL and listen carefully for any increase in rpms.
If you dont find any leaks it's still sounds like a vac problem. The motor in simple terms a pump so would low compression or valve lash not set right cause this also?? idk
Anyway keep us updated.
Try what Tony said and cover the carb and see if it trys to start better than just holding choke closed I'm betting it will try and fail maybe a little better than just hand on choke butterfly. It does sound like a vac leak something you had before the carb replacement. Just enough to not start cold but run hot. I'll bet when it does start an running it's way lean.you could pull a plug and see the color of plug.
If it is you've got to find the leak, gas in q spray bottle can sometimes work but you have to be careful VERY CARFUL and listen carefully for any increase in rpms.
If you dont find any leaks it's still sounds like a vac problem. The motor in simple terms a pump so would low compression or valve lash not set right cause this also?? idk
Anyway keep us updated.
