Proper alignment = Quiet - SailNet Community

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Old 04-23-2013
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Smile Proper alignment = Quiet

With the new engine installed and aligned I am amazed at the difference it makes inside the boat. The Sundown Heat & Sound barrier has also provided some additional noise reduction as well as a covered intake but its evident that a precise alignment makes all the difference. Some things are worth the time, I urge you to be sure your alignment is right, for other reasons than just noise of course...but wow. Partial credit goes to Beta and their custom mounts which were so well engineered. Most of the credit goes to the mechanic
JimMcGee, zeehag and jimgo like this.
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Old 04-23-2013
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Re: Proper alignment = Quiet

I'd have to second that regarding the alignment. We only had the hunter out a couple of times last season then had the motor mounts replaced along with some other eng work we were having done. the difference is like night and day as it is now and the mech wanted to tweak it a bit. It's like a new engine and was well worth the $$$
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Old 04-24-2013
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Re: Proper alignment = Quiet

Where did you have the work done?
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Old 04-24-2013
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Re: Proper alignment = Quiet

I will third that. We had our new, engine mounts a new shaft, cutlass bearing, dripless PSS shaft installed at Haven Harbor where your boat is Jim.

Quieter and smoother for sure
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Old 04-24-2013
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Re: Proper alignment = Quiet

Problem I have with a quiet motor is I can't tell if its on.
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Old 04-24-2013
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Re: Proper alignment = Quiet

Appreciate insight in doing alignment yourselves. I have to redo mine. Didn't have the stamina to do a good job last time.
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Old 04-24-2013
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Re: Proper alignment = Quiet

looking forward to a quieter engine after a good re alignment--also will again address packing gland, as it is having way too much fun as a dysfunctional.....
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Old 04-24-2013
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Re: Proper alignment = Quiet

Don't underestimate the difference new motor mounts can make. When I did ours I was amazed at how much quieter the motor was.

And the PSS shaft seal - after having one I'd never go back.

Chef, I'm curious about the Sundown Heat & Sound barrier. Can you tell us a little more about it?

Thanks,
Jim
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Old 04-24-2013
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Re: Proper alignment = Quiet

It's quite amazing how much of the 'engine noise' most of us suffer is actually from non-engine related vibration. Cabinet doors, stove grills, companionway ladders all contribute to an overall noise level that often isn't differentiated from actual noise of the motor, which is for the most part a pretty low frequency rumble.

We've gone around and put soft pads under all our storage cabinet doors, and even the mating parts of the engine box for a significant reduction in noise under power.

For actual engine noise, one of the neatest and most effective tricks is to drape the engine block with a dentist's Xray blanket - be careful not to block the air intake..
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Old 04-24-2013
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Re: Proper alignment = Quiet

Faster, doesn't that increase the engine temperature? I could see lining the walls with it, but putting a blanket over the engine seems somewhat counterproductive.
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