Yamaha 9.9 four stroke stalling at higher rpms

[Ryanlins]

Just bought a Yamaha T9.9elrs. Was running fine for long periods of time when I bought it. Recently brought it home (on side with Carb up) and installed it on my boat. It previously was hooked up to an inboard gas tank, I fitted it to a portable gas tank (New). Seems to start ok after a few tries, idles, but as soon as it goes to high rpms it stalls out. Seems to be a bit of air coming out the coupler that connects to the engine...could that cause my problem? Or other ideas I can try?

I have a feeling its gas related, somehow the engine is not getting enough gas. Thanks for your help in advance!

 

[99yam40]

Seems to be a bit of air coming out the coupler that connects to the engine...could that cause my problem?

Air should not be coming out of a gas line as the fuel pump should be sucking on the fuel line to motor

 

[Ryanlins]

Update: Replaced coupler that connects to engine, replaced primer bulb, and fuel filter. Still same problem. Oil is right level. Wondering about fuel pump issue possibly or carbeurator??

 

[Ryanlins]

No Title

Here are some photos. I noticed the housing is cracked...what do you think?? The part is $115 at dealer...seems pricey

 

[99yam40]

If it is broke then replace it.
You do know what boat stands for right?