My 2000 FICHT 225 is making a whining noise after starting. It sounds similar to the noise the fuel pump makes when first turning on the key switch. I have audio and video files if anyone can listen? The pump does stay on several seconds after the check lights go off, maybe 5, normal? The high pitch whining starts after maybe 20 seconds when running and gets progressively louder and higher pitched until about 40 seconds in. Doesn't sound too good at that point, lol. It really does sound like it's coming from the external pump next to the fuel filter. Sounds like a whining motor noise so I doubt it is internal to the motor. Very high pitched and very noticeable.
Also, I recently had a engine check warning and limp mode symptom, and changed fuel filter, plugs, thermostats. This is before noticing the noise but it could have been there, so if a failing fuel pump would cause an alarm, could be it. I really can only hear it with the cowling off. I think the fuel line is well bled so I don't think it is air in the system but could be. Filled the filter with gas before starting and turned the key switch several times before starting the first time. EMM is fine, had it checked a few years ago and it was replaced with a new part in 2008.
Thanks much!