Yamaha 225hp 4 stroke fuel pressure?

[Tinke]

Can somebody tell mee what is correct pressure low pressure fuel pump 1 in Yamaha 2006 225 Hp 4 stroke engine?Yamaha part number 69J-24410-02-00.
I hawe change allready high pressure pump before and now low pressure pump dont work sometime and i clean pump so now working but i dont now how long time!i hawe 2009 modell engine too and this is working good no hawe same problems than older engine.

[jeffersondodson561]

The low pressure pump operates according to engine rpm, the pressure should be anywhere from 4-8 psi.

[Tinke]

I look before someboby write in here that pressure is 36 psi and other one write 41 psi?
How that can bee 4-8 psi?

[jeffersondodson561]

That is the pressure of the high pressure pump (at least I assume that is the correct pressure) the low pressure is what transfers the fuel to the vapor seperator and then it gets boosted up to the higher pressure. The low pressure pump is the one on the outside of the VST.