Noisy Exhaust Seaswirl 5.7 OMC Help.

[Quaoptic]

I have a 1988 22' Seaswirl with a 5.7 260HP I/O.<br />It has through the hull exhaust, with two chrome pipes protruding through the transom. Its a great boat and sounds like a stock car going up the river. Not too condusive to casual cruising.<br /><br />Is there something I can do to quiet this down? Would there be a problem redirecting the exhaust through the outdrive? If so, can I use the existing parts? Will there be a drastic performance loss? Will this cause damage to the ourdrive?<br /><br />Any suggestions good or bad would be appreciated.

 

[WillyBWright]

Re: Noisy Exhaust Seaswirl 5.7 OMC Help.

Welcome to iboats.<br /><br />You can get a system where you can direct the exhaust out the back or thru the prop with the flip of a switch. You lose a little performance going thru the prop, but you'll appreciate the relative quiet when you're not wanting the noise.

 

[Don S]

Re: Noisy Exhaust Seaswirl 5.7 OMC Help.

You could go back to the original setup, with no problems. Just plug the 2 thru the transom holes were the exhaust was and hook up the exhaust risers to the Y pipe that goes out the bottom of the transom shield. The big question is how much of the original exhaust system is still in your boat. <br />Do you have a Mercruiser, Volvo, OMC, or something else??<br />You can also get exhaust silencer tips for some makes of exhaust. Check the link below.<br /><br /> Corsa Exhaust Systems

 

[tfjrc2]

Re: Noisy Exhaust Seaswirl 5.7 OMC Help.

Quaoptic:<br />I have a similar issur with my 7.4L mercruiser. The straight tips are just too loud. Kind of like open the headers that NASCAR uses.<br />I looked into adding the switch / captains call but have no Y pipe or anything to start with. Marina tells me "no prob" we just pull the motor, add the kit, and labor. $2 grand please. Well....no thanx, at least not without trying something else first.<br />They are not installed yet, but I went with silencer tips for about $300. <br />We shall see, but these will not interfere with the captains call, even if I do not get enough reduction.<br />Trouble is I won't know till spring.....

 

[Quaoptic]

Re: Noisy Exhaust Seaswirl 5.7 OMC Help.

The outdrive is a OMC King Cobra. It appears to have the original exhaust "Y" leading to the outdrive. I think I can use the existing "hoses" and reconnect to the outdrive exhaust, and simply "plugging" the Hull exhaust ports? (?)

 

[Quaoptic]

Re: Noisy Exhaust Seaswirl 5.7 OMC Help.

My last comment was intended to be more of a question than a statement.