Carburettor Float Problem?
Posted: Sat Aug 05, 2017 5:06 pm
Hello!
I have been having trouble with my Mercruiser 120hp. It starts great from cold, then won't start from warm / hot.
I took the flame arrestor off and turned the engine over. To my surprise (and horror!), after about two turns of the engine, petrol poured out of the pipe circled in the image below like it was coming out of a hosepipe and onto the hot manifold (obviously the flame arrestor had been catching it). The reason the engine wouldn't start from warm / hot is because (I deduce) that the petrol is filling the carb and flooding it.
My diagnosis is that the float needs adjusted to cut off the fuel flow when necessary. It's an easy job to do and I'll tackle it in the coming days.
Is my diagnosis fair - or have I got the function of the red circled pipe in the picture wrong? I'm sure it is an overflow pipe for cases such as this one.
Help or confirmation of my diagnosis would be gratefully received!
Thanks,
Ian.
I have been having trouble with my Mercruiser 120hp. It starts great from cold, then won't start from warm / hot.
I took the flame arrestor off and turned the engine over. To my surprise (and horror!), after about two turns of the engine, petrol poured out of the pipe circled in the image below like it was coming out of a hosepipe and onto the hot manifold (obviously the flame arrestor had been catching it). The reason the engine wouldn't start from warm / hot is because (I deduce) that the petrol is filling the carb and flooding it.
My diagnosis is that the float needs adjusted to cut off the fuel flow when necessary. It's an easy job to do and I'll tackle it in the coming days.
Is my diagnosis fair - or have I got the function of the red circled pipe in the picture wrong? I'm sure it is an overflow pipe for cases such as this one.
Help or confirmation of my diagnosis would be gratefully received!
Thanks,
Ian.