interior engine noise

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   I have a 1999 Ski Nautique Open Bow with about 340 hours on the Pro Boss 310 HP engine.  I have grown up around Nautiques and have been in several the last few months and know how quiet they run.  I think the engine on my boat is too loud when riding in the boat.  What is the standard decibel for a 1999 Nautique?  I am looking for any way to make it quieter.  Could the muffler be going bad?  Anybody else come across something like this?  Thanks in advance for the help.

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James Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote James Thanks(0) Quote Reply Topic: interior engine noise Posted: July-15-2005 at 3:38am
	I have a 1999 Ski Nautique Open Bow with about 340 hours on the Pro Boss 310 HP engine. I have grown up around Nautiques and have been in several the last few months and know how quiet they run. I think the engine on my boat is too loud when riding in the boat. What is the standard decibel for a 1999 Nautique? I am looking for any way to make it quieter. Could the muffler be going bad? Anybody else come across something like this? Thanks in advance for the help.

David F Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member Joined: June-11-2004 Location: United States Status: Offline Points: 1770	Post Options Post Reply Quote David F Report Post Thanks(0) Quote Reply Posted: July-15-2005 at 12:49pm
	No idea on decibel readings. Some people line the inside of the motor box with insulation and claim it helps a ton. I believe Overtons does or used to sell the insulation kit for this purpose. The insulation is reinforced foil faced. Mufflers, being all fiberglass usually last a long time...certainly since '99. Have you check to make sure something on the engine such as an accessory (alternator, water pump(s)) are not the cause of the excessive noise? Is the exhaust manifold leaking at the head(s)?

James Members Profile Send Private Message Find Members Posts Add to Buddy List Guest	Post Options Post Reply Quote James Thanks(0) Quote Reply Posted: October-06-2005 at 1:48am
	David, Thanks for the reply. I will look into your ideas. Unfortunately, I have been out of town for a while, but I should be able to get back to it now.

GottaSki Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3365	Post Options Post Reply Quote GottaSki Report Post Thanks(0) Quote Reply Posted: October-06-2005 at 8:23am
	and often interior noise can come from engine misalignment.
	"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole

interior engine noise

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