Strange outdrive noise

gener8s

Cadet
Joined
Aug 16, 2010
Messages
15
Hi all,
Friday night after picking my boat up at the marina (new cover and Bimini, but that's another story), I relaunched my boat at what we loosely refer to as our "boat launch", and wasn't even off the trailer when I found one of the 6000 rocks that litter the area. I was in reverse but barely moving. I must have just caught it but I did take a small (1/4-1/2 inch) chip out of one blade and just bent the other 2. I brought the boat back to the cottage dock without incident and it seemed fine I had been thinking about re-pitching anyways from the 14 1/4 x 21 prop that came one the boat. I bought a solas rubex 14 3/10 x 19 and intstalled it on the boat and water tested it. It seemed to work great except for a weird whirling/whining sound at exactly 1000 rpm and around 4600 rpm. No vibrations or anything like that. WOT is now 5000 rpm so I know I need to keep an eye on engine speed. I called the guy who sold me the prop and he seemed to think the prop was just "singing", and I didn't need to worry. I've been doing some reading and apparently it's not uncommon in re-pitched props. Anyone have any experiance with this?
Thx!!!
 

gener8s

Cadet
Joined
Aug 16, 2010
Messages
15
Re: Strange outdrive noise

Sorry! Boat's a 2004 Bayliner 185 with a 3.0L and an Alpha 1 gen 2
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,130
Re: Strange outdrive noise

Hi all,
Friday night after picking my boat up at the marina (new cover and Bimini, but that's another story), I relaunched my boat at what we loosely refer to as our "boat launch", and wasn't even off the trailer when I found one of the 6000 rocks that litter the area. I was in reverse but barely moving. I must have just caught it but I did take a small (1/4-1/2 inch) chip out of one blade and just bent the other 2. I brought the boat back to the cottage dock without incident and it seemed fine I had been thinking about re-pitching anyways from the 14 1/4 x 21 prop that came one the boat. I bought a solas rubex 14 3/10 x 19 and intstalled it on the boat and water tested it. It seemed to work great except for a weird whirling/whining sound at exactly 1000 rpm and around 4600 rpm. No vibrations or anything like that. WOT is now 5000 rpm so I know I need to keep an eye on engine speed. I called the guy who sold me the prop and he seemed to think the prop was just "singing", and I didn't need to worry. I've been doing some reading and apparently it's not uncommon in re-pitched props. Anyone have any experiance with this?
Thx!!!

Ayuh,.... Welcome Aboard,...

I haven't, but checkin' the drive oil for water, crud, or metal can give ya piece of mind...
 
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