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I’ve got a ranger aluminum boat it’s about a year old it has a 150 pro xs on it. The fuel line has a primer bulb I don’t see primer bulbs on the newer glass boats. Is this primer bulb nessasary. I’ve been having issues with fuel pressure since early summer the dealer and ranger have been no help. 

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You need the primer bulb if you ever run out of gas, or plan to ever winterize the motor, or if the boat ever sits unused long enough for the vapor separator to go dry.  The new glass boats certainly do have them ....or they should.

What makes you think that you have a fuel pressure problem ?

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1 minute ago, fishinwrench said:

You need the primer bulb if you ever run out of gas, or plan to ever winterize the motor, or if the boat ever sits unused long enough for the vapor separator to go dry.  The new glass boats certainly do have them ....or they should.

What makes you think that you have a fuel pressure problem ?

When ideling the motor will die and I need to pump the primer bulb to restart. Then the motor will run great for a while then die again I’ll prime again. I’ve changed the gas cap this was Rangers idea the dealer had the boat they can’t find anything. Just recently I had a alarm for the fuel filter water seperater to be replaced since then this problem has been more frequent. This has been the most frustrating experience 

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Sounds like you are truly glad to have that Merc Warranty! 🤣

Ok, here are the things that can cause that....  

Stuck anti-siphon valve at the fuel tank pickup tube.

Clogged, kinked, or leaking fuel supply hose.

Fuel pickup pump has a broken spring or a leaky diaphragm.

Stuck needle valve in the vapor separator.    

Fuel tank that is not venting properly. 

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2 hours ago, Smalls21 said:

wrench, is it possible there is a tear in a diaphragm valve within the fuel rail?

100% possible, because that happens alot.  But that won't be the cause of the condition being described here.

He says that once the primer bulb is pumped up then it starts and runs fine for a short time.    

Besides, if it is a 2016-17 Pro XS then I don't think it has the troublesome 804533 diaphragm.

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