Underwater thru-hull Ex. fitings... good/bad?????
#2
Registered
Join Date: Mar 2002
Location: Alexandria, VA
Posts: 64
Likes: 0
Received 0 Likes
on
0 Posts
I remember reading a tech article in Powerboat last year addressing the underwater thru hull outlets. Bob Teague said that the boat was quiet around the docks, but the underwater outlets made for some strange engine behavior in rough water. He said that upon launching the boat off a swell, he found the engines would lose 500-600 rpm when the bottom of the boat contacted the water again. I guess water was forced against the exhaust outlets upon re-entry and greatly increased the backpressure. Teague also noted that this could have some negative impact on engine reliability. Hope this helps...
Racing_Fan
Racing_Fan
#3
Registered
Join Date: Mar 2001
Location: Rochester, MN
Posts: 310
Likes: 0
Received 0 Likes
on
0 Posts
I have under water exhaust on our boat and love it. I have never had a problem with loosing rpm after launching off of a wave and I get the entire boat out of the water plenty . (Just ask THirsty turtle or caincando). We have huge noise laws up here and having the under water exhaust is awesome, .
#4
Registered
Join Date: Feb 2002
Location: St. Louis, Mo
Posts: 39
Likes: 0
Received 0 Likes
on
0 Posts
I have underwater exaust on my 25' Warlock and it works great. At idle or no wake speeds you can hear the stereo perfectly. Mine also has flaps. We run the Mississippi on the upper Alton Pool
#6
Guest
Posts: n/a
Thanks guys good to hear I know a lot of the older F233’s had this but mine does not I guess I’ll start researching the manufacturers. I just love it when the Supra’s & Master-Crafts fire up hear on Lake St Louis the underwater fittings make for such a classy sound kind of like the old Chris Woody’s of yesteryear. Any hu thanks again anyone know a good resource for ex. fittings…….
#9
www.cpperformance.com has a few fittings...look under exhaust accessories...have seen a few others on dif exhaust manuf. sites..corsa .. stainless marine ..... ect...