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Primer bulb


tasksta

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Another day another boat question. :)

Should the primer bulb be before or after the water seperator filter? Does it matter? Should the bulb remain hard once primed with the engine off?

I have mine before the filter mounted vertically with arrow up. Im troubleshooting leaks as the bulb goes soft after a while even with the engine off. And yes its a genuine new primer bulb. :)

I guess if the bulb was after the filter, even if there was a small leak before it the bulb would remain hard?

Thanks in advance!

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They reckon put it after the water seperator so you dont aerate the fuel and water so they told me when i had 2 new racors fitted but a bit of a pain to prime after draining seperator as you must fill them before getting fuel to primer

Hope it helps

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Should the primer bulb be before or after the water seperator filter? Does it matter? Should the bulb remain hard once primed with the engine off?

I don't think the position makes a lot of difference but normally the bulb is after the filter.

As the name suggest it's there to prime or fill the fuel system manually. Once filled & the motor is running the pressure is released & the bulb becomes softer.

On a days outing , once the motor has been running then stopped for a short period , it should not be necessary to prime the system again.

If this is not the case , then one of the connections is "loose" & allowing air to be sucked into the system.

Geoff

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Hi, after is better because the filter if replaced yearly will trap any junk that can damage a primer bulb. Do not skimp and use cheap bulbs-they will cause way to many problems with any outboard and best to have the arrow facing vertically up-they work a lot better in the vertical position.

Cheers,

Huey.

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