[steelerman]

When I start the Ace there is a quiet whining noise which seems to be coming from under the seat. Could that be the fuel pump. I guess that could be normal.

 

[ACE Ventura Polaris]

Fuel pump is correct

 

[Scoundrel]

Covered in detail in this thread.
Specifically, this post has a video.

When my ACE is idling in my driveway, I can hear that whine clearly while standing about 15 feet in front of it.
It fades out quickly further than that.

 

[steelerman]

Thanks for the replies. Now I don't have to worry about it.