99 ox66 fuel pump question

[CliffFort]

Hi i have a 99 yamaha sx150txrx. The engine died on me and when I restarted it would start and idle but die when I put it under a load. Then it just stopped starting.I was towed in and when I got to my shop I put a fuel pressure gauge on it and it started right up and ran fine with 35 psi of fuel pressure. I have seen some post that state the ecm will shut the engine down if the pump draws more than 5 amps but could not find the specs on how many amps it should draw. I hooked an amp meter to the pump and it is drawing 4.9 amps when running and fuel pressure is 35 psi.Is this too much? Thanks Cliff

[boats.net]

Probably need to to test fuel vacumn, may have a fuel restriction in fuel supply system.

[jb123]

also check motor filter and VST filter

[CliffFort]

I took off the VST and the filter on the pump was clean and the entire VST was very clean. The filter before the low pressure pump was also clean. I don't know what a fuel vacuum test is but if it is to check for a supply restriction to the VST then I don't think that will find anything because the when the boat would not start the fuel filter canister was full of fuel. Cliff

[jb123]

oh it would start just supply wouldnt keep up with demand, IF there was a restriction
need to run under load and watch the pres gauge

[MechanicMike]

Maybe try runnin it off an auxillary tank to see if its a clogged pick up or check ball problem.

Mike