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Home Port: LI Sound
Vessel Info: 2004 29 open, crusaders
when I accelerate the throttle I get a whining noise which seems to come form the front of the engine. No noise at idle and I dont have to be in gear for noise to start. Not sure what it ca be, Any ideas? Belts are tight.
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Home Port: Ashtabula, OH
Vessel Info: 1986 Tiara 3600 Open, Crusader 454's
07-07-2020, 07:38 AM
(This post was last modified: 07-07-2020, 08:38 AM by Misdirection.)
It would be helpful to know what boat, motors, and transmissions you have to try and help you out.
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Home Port: South haven,mi
Vessel Info: 2006 3200 0pen 8.1 crusaders
If you have 8.1s there is a very distinct intake whistle that occurs as you come up on plane it's caused by the air flow through the throttle body and can be remedied by installing a thin plate between the throttle body and intake manifold. This plate has a small finger that protrudes into the air stream and slightly changes the air flow which cancels out the whistle. They are available through any crusader dealer.
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Home Port: Stamford, CT
Vessel Info: 2003 Tiara 35 Open, 8.1L Crusaders (previous owner)
Check to see if the belts are rubbing against the flame arrestor (also look for belt dust on the hatch).
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Home Port: Port Canaveral, FL
Vessel Info: 2003 Tiara 50 Open
3406E Cats
Are they diesels? Turbos whine!
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Home Port: Ashtabula, OH
Vessel Info: 1986 Tiara 3600 Open, Crusader 454's
Profile says they have a 2004 29 Open w/Crusaders.
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Home Port: LI Sound
Vessel Info: 2004 29 open, crusaders
Sorry should have given more info. They are crusader 5.7 gas engines. I removed the belt and ran engine for a few seconds and no whine. I think this rules out transmission pump and fuel pumps. Seems to be coming from front of engine, so could be one of the pumps, raw and fresh water. Alternator? I was going to change out tensioner as a start. Has anyone had a whine from the tensioner? Belts were tight. Noise just started last trip.
Thanks all....
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Home Port: Port Canaveral, FL
Vessel Info: 2003 Tiara 50 Open
3406E Cats
Feel for any pulleys that may be loose. if there is any play in them there's your culprit. Alternators are known to whine some when the bearings are going bad.
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Home Port: LI Sound
Vessel Info: 2004 29 open, crusaders
I changed the belt tensioner pulley. Seems to have the done the trick...thanks all
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Home Port: Chester MD
Vessel Info: 2006 47' Tiara
705 hp Cat C-12
sounds like turbos spooling up to me.......
