New (used) muffler.. which way is up?

[ct9amr]

Try the exhaust turn downs outside the hull before the muffler deal. I removed the flappers and put on 45 degree units and pointed it under water while running slow.

This was a huge improvment and I never isntalled mufflers after that.
At WOT the turn down are above water sot here is no restriction.

Check out fish the classi for lots of ideas on making yours managable.
A lot of people end of putting sound deadoning inside the engine cover as well.

[Outrageous]

Originally Posted by ct9amr

Try the exhaust turn downs outside the hull before the muffler deal. I removed the flappers and put on 45 degree units and pointed it under water while running slow.

This was a huge improvment and I never isntalled mufflers after that.
At WOT the turn down are above water sot here is no restriction.

Check out fish the classi for lots of ideas on making yours managable.
A lot of people end of putting sound deadoning inside the engine cover as well.

What is fish the classi? I like the idea of low backpressure that equals HP and fuel economy. Can you post some pictures of your set up? I would like quiet too. Thanks, Steve

[ct9amr]

fishtheclassic.net is the shamrock forum. Lots of good ideas from guys who deal with inboards. The group is great.

I don't have a picture of my setup since I sold the boat a few years ago.
I bought some silicone connections that I clamped onto my exhaust after removing the flapper. They are pictured below, but you need to get them long enough so they are under water while under way.



I also looked at something like this but it seemed like I a lot of work to accomplish the same thing.