50 has no power

[towmein]

i have an 86 bayliner capri wi

i have an 86 bayliner capri with volvo penta 5.0 when 4 barrel opens has no effect on rpms what is my problem

 

[sandkicker]

What are your RPMs when you do

What are your RPMs when you do this?

 

[towmein]

the rpm is about 3000-3200

the rpm is about 3000-3200