150 4 stroke lack of fuel

[Sammy150]

Not getting fuel to the motor. Primer bulb does not get hard nor delivers fuel to filter.

[CatCam]

May be as simple as replacing the primer bulb! Happened to my brother with his Yamaha F115. His motor would start but whenever he tried to get up on plane it would kill and it was evident that the motor was starving for fuel......same symptoms as you, primer bulb would not get hard and when you squeezed it fuel seemed to be going 50/50 some to the motor some back to the tank!

[Sammy150]

That is my thought as well, but it started and ran (although rough) on the muffs before we headed to the dock. It started fine then cut out when put into gear. Then would not start after that. I emptied the filter suspecting water and was unable to get fuel back into the filter pumping primer.

[DennisG01]

Well, I hate to ask the obvious, but are you positive that the tank has fuel in it?

Does the fuel bulb pop right back, or does it stay compressed for a bit? Give as much detail as you can. Have you checked the fuel line back to the tank - how does it look? Take the fuel line off at the tank and pump the bulb - does it create suction against your finger? Try sticking the end in a bucket of fuel.

[Sammy150]

Problem solved😀

Replaced primer bulb and water/fuel seperater filter. Took some time but eventually she fired up and purred like a kitten😸. My believe is that the w/f filter failed (leaked) and lost the prime. Thanks for the replies.

[rodbolt17]

did you actually check the gasket mating surface on the water separator head?
you would not believe how many cast AL heads corrode and shove the gasket out and leak air.
as most you cannot see,only feel.
they never get checked for the white stuff.

[Sammy150]

I did not check the head, and you could be correct as it looks pretty bad. But when I filled the filter with gas it leaked like crazy. Thanks for the heads up on likely my next issue.

[rodbolt17]

dude this aint nascar nor rocket science.
it does require a firm grasp of simple physics.
maybe 8th grade earth science.
to bad I made a D in 8th grade angkish.

what I am trying to say, rule out nothing.
pay attention to everything,
you will be surprised.