Mercruiser 4.3 mpi

[sessa-boy]

Hi I have a slight whine on tick over which concerns me - I try and upload a video. Doesn’t respond to increased revs, only tick over. Can anyone put my mind at rest until I get to a mechanic later this week please ?

 

[William_H]

I don't know your engine however cars often develop a whine as you describe which often comes from the steering hydraulic pump. Low hydraulic oil will do this. Now I don't know if you have a hydraulic pump similar on your engine.
One way to check is to remove the drive belt for the accessories to do a quick check. I reckon you will find no whine then.
However of course make it a very quick check as you probably have no cooling pump. Alternatives to steering pump could be water pump or alternator. good luck olewill