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Old 05 September 2012, 09:27   #1
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Fuel priming bulb not getting hard?

Noticed this yesterday when starting - pumped the bulb as normal but it did not get hard despite lots of trying. Both connections are good and engine ran OK but does this indicate there is a hole somewhere?

Trying at home today with the engine side disconnected same result. Depressing valve and fuel certainly pumps out OK (all over my feet....).

If so what is the best way to find the problem section?
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Old 05 September 2012, 09:41   #2
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Noticed this yesterday when starting - pumped the bulb as normal but it did not get hard despite lots of trying. Both connections are good and engine ran OK but does this indicate there is a hole somewhere?

Trying at home today with the engine side disconnected same result. Depressing valve and fuel certainly pumps out OK (all over my feet....).

If so what is the best way to find the problem section?
Quickest and cheapest is replace the pump, sounds like the one way valve may have gone>
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Old 05 September 2012, 10:29   #3
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I believe this is age-related and not uncommon. Have you tried asking someone else to help and see if this makes a difference? Don't worry about it - that will only make things worse. Try again after half an hour or so.
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Old 05 September 2012, 10:33   #4
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Are you pumping it the right way up?
So fuel is drawn in the bottom & comes out the top?
But I would agree to replacing it as a easy fix!
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Old 05 September 2012, 10:35   #5
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Quickest and cheapest is replace the pump, sounds like the one way valve may have gone>

What he said
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Old 05 September 2012, 10:38   #6
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My bulb is only firm and not hard, got an engineer to look at it, and he said it was 100% A-OK.

Maybe that is just how it should be.
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Old 05 September 2012, 10:51   #7
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Honestly, ask an innocent question!

Nick - yes, it's connected the right way...!

But...just went back again to re-try and it's hard as a hard thing now...maybe a fault with the connector after all?
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Old 05 September 2012, 11:01   #8
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Honestly, ask an innocent question!

Nick - yes, it's connected the right way...!

But...just went back again to re-try and it's hard as a hard thing now...maybe a fault with the connector after all?
Sorry not what I ment, if the in side is higher than the out this can cause the same problem!
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Old 05 September 2012, 11:37   #9
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Sorry Nick, I should not have doubted you!

Yes, all set up the right level etc.
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Old 05 September 2012, 15:23   #10
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Bulb not going hard can only be down to one of two reasons:

Inlet valve not sealing so fuel being pumped back to the tank

Leak somewhere in the engine.
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