Whirring Trim Pump (with audio)

[chriscor]

I have an Alpha One Gen II with a Trim Pump starting to make screaming noises. The whirring starts with trimmig up until trailer position. Down sounds ok to me. Here is the audio: First 4 sec. is "up" with the whirring 4-8 sec. is "down" (ok):

VID_20130804_153204.mp4 - YouTube

Fresh oil, no water intrusion. Drive is trimming fine beside "up-whirring".

Thank's for any guidance on this.

 

[Bt Doctur]

Re: Whirring Trim Pump (with audio)

bronze bushings are dry inside the motor 5A-22 http://www.boatfix.com/merc/Servmanl/6/6A5R3.PDF

 

[Oshkosh1]

Re: Whirring Trim Pump (with audio)

Sounds like it may be cavitating...check for any source of air intrusion.

 

[chriscor]

Re: Whirring Trim Pump (with audio)

bronze bushings are dry inside the motor 5A-22 http://www.boatfix.com/merc/Servmanl/6/6A5R3.PDF

Would you recommend some oil to the shaft bushing?

 

[Bt Doctur]

Re: Whirring Trim Pump (with audio)

oil or grease would quiet it down

 

[chriscor]

Re: Whirring Trim Pump (with audio)

oil or grease would quiet it down

I greased her up but no major difference )-:
"Down" is fine - "up" with screaming

VID 20130806 161647 - YouTube

Any further thoughts?