Sounds like a jet engine hum.

Post by **Magnarae** » Mon Jul 04, 2016 1:18 pm

I ran out to Montauk and Block Island for the Holiday week. As I was pulling into Montauk Inlet, I noticed what sounds like a jet engine hum. Its not coming from the engine. If I am at idle in gear it sound like as whooshing sound coming from under the boat. I also noticed it as I was at idle in gear with following seas. Any ideas?

Post by **Jeremyvmd** » Mon Jul 04, 2016 10:13 pm

Did you have any pumps, Ac or genset running at the time? Did the wake behind the boat look clean and normal?

Post by **Magnarae** » Tue Jul 05, 2016 12:34 pm

No pumps or anything running. the wake behind was clean. I hear this also in the back bay when I slowly throttle up. It is no louder with the engine box open.

Post by **Jeremyvmd** » Tue Jul 05, 2016 12:39 pm

Does it go away at high throttle or get worse? Have you checked all your hoses/intake/exhaust for leaks? Can you walk around the boat as someone else drives to localize the sound?

Post by **Magnarae** » Thu Jul 07, 2016 9:44 am

All hoses tight. No air leak or intake leak. The noise fades away once throttled up.

Post by **Tree** » Thu Jul 07, 2016 10:32 am

Does it only happen in gear? Have you replaced the cutlass bearing recently?

Post by **Magnarae** » Fri Jul 08, 2016 10:44 pm

It happens only in gear. We left Block Island RI this morning and in gear at 5kts or so with 4 to 5 ft following seas, I could hear it pretty loud. Once I accelerate the noise goes away. The boat runs great. I have not replaced the cutlass bearing.

Post by **RobS** » Fri Jul 08, 2016 11:02 pm

Following seas, yup, east winds and fog today here in Moriches. Any fog?

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Sounds like a jet engine hum.

Sounds like a jet engine hum.

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Re: Sounds like a jet engine hum.

Re: Sounds like a jet engine hum.

Re: Sounds like a jet engine hum.

Re: Sounds like a jet engine hum.

Re: Sounds like a jet engine hum.