Yamaha F115 power loss

[tug]

Hi,
my 2005 F115 runs for about a minute at WOT then losses power to idle or stalls completly. I have changed the injectors, plugs, low pressure fuel pump,fuel filters and the fuel lines. Sampeling the fuel shows no water, im at a loss. if I pump the fuel bulb the motor will run.

Any ideas? Thanks in advance
Bob

 

[Brent]

Several items to check.
Check the fuel hoses for kinks esp in rigging tube where it enters the motor or replace them. Inner hose can separate. Check tank vent is clear. Dual valve primer bulbs are better and need to be mounted vertically. Check ASV is clean and not blocking fuel. Pull fuel pickups . If old just replace.