2001 60hp 4-stroke won't warm start.

[Mattyb08]

I am having trouble figuring out the problem. It starts with out a problem when it is cold but after it is warm it has trouble starting. When I squeezed the fuel bulb it feels like there nothing in it but only after it has been running, when it sits for a fuel days the bulb is full & firm. I did find if I barely crack the throttle open it starts right up when it is warm. I thought it was the fuel pump and replaced it but that didn't fix the problem. Any help would be appreciated. Thanks!

 

[Canufixit2]

Vent on the gas tank plugged/not open??
Try another remote tank.
After it's warm - it should start with no throttle. Why are you giving it throttle when it's warm?

 

[CharlieB]

Generally when opening the throttle allows the motor to start it is a sign of too much fuel, possibly almost flooding the cyls.

You may want to check the carb float heights to make sure they are not set a bit too high. And/or the idle mixture screws set just a bit too fat.

It is very easy for a mechanic to forget while adjusting 4 stroke carb idles that it is a 4 stroke NOT a 2 stroke. 2 Stroke must be adjusted fat, while the 4's don't like any excess fuel. Adjust all idle mixtures to Best Idle while IN Forward gear. That is all.

Fat is fine while cold, but will cause the issues you describe once warmed up.