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500 EFI Powersteering pump defect ???

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500 EFI Powersteering pump defect ???

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Old 07-14-2014, 05:12 AM
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Default 500 EFI Powersteering pump defect ???

I got trouble with my steering,anybody ever got trouble with the small powersteering pump on 500/525 EFI or trouble with the powersteering actuator/slave ? Thanks

Last edited by 502 Magnum; 07-14-2014 at 05:16 AM.
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Old 07-14-2014, 08:07 AM
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Yes, we replaced one one on my friends 525 that steered manually no matter if the motor was running or not.
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Old 07-15-2014, 06:50 AM
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Ok,and after replacing the pump the steering was ok? With other words,the original pump did not work .It looks like I have to get another pump yes.
Thanks.
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Old 07-15-2014, 07:50 AM
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The pump was not working. It was very tough to steer. If the wheel is easy to turn and the boat does not turn you may just have to bleed the air out of the lines.
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Old 07-15-2014, 07:55 AM
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I have a similar issue, at idle its real tight, but when the rpm's come up its fine, whats up with that, wore out pump ?? Merc 500's EFI

not trying to hijack 502

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Old 07-15-2014, 03:03 PM
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Originally Posted by 33outlawsst
I have a similar issue, at idle its real tight, but when the rpm's come up its fine, whats up with that, wore out pump ?? Merc 500's EFI

not trying to hijack 502
Most likely.

That situation happened on the Checkmate after we converted it to full hydraulic. Was ok while cruising but when idling and the pump pressure was less it was a MF to turn. We ended up putting a new pump on it.
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Old 07-15-2014, 04:18 PM
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Whats inside this small pups,what is going wrong,I need to test again but it seems to me my pump is dead and my small helmpump are doing the job.
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Old 07-15-2014, 04:46 PM
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Sorry I did not explaine that I got a separate hydraulic system with helm pump instead of the Std cable steering,thanks.
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Old 07-15-2014, 08:46 PM
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So do we on the 253, im not 100% sure but I think the helm pump is there to direct the flow of fluid left to right.

The power steering pump on the engine is what is lacking causing it to be really hard to turn at idle.
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