Yamaha f80a 2002 rpm issues

[Knut]

Engine wont rev past 2000/3000 rpm , it just dies.
Have opened the fuel membrane pump , it looks ok but im unsure how to test it properly since it comes off in 3 parts..
Squeezing the bulb during running changes nothing, vsf is clean and never had water in it. No other filter. Fresh fuel in system/tank. Running good at idle, all sparkplugs looks ok.
Need help asap ! In daily use..

 

[Knut]

Just changed primer bulb, and 5000 rpm at once. Seems that it's fixed i hope

 

[johnnygjr]

Fuel lines are 15 years old also,inspect and or replace them