Like Tree0Likes

internal flappers necessary?

Old 08-02-2005, 03:42 PM
Thread Starter
jec1521's Avatar
Join Date: Jun 2004
Location: Norwood, NJ
My Boats: 1989 38' Scarab
Posts: 75
Default internal flappers necessary?

Are internal flappers in exhaust tips necessary? I just got new ones that have them but my old ones didn't have them, but they had slip on mufflers on them. I would like the boat to sound as loud as possible. Thanks
jec1521 is offline  
Reply With Quote
Old 08-02-2005, 03:49 PM
Join Date: Nov 2000
Location: Glastonbury, CT
Posts: 890
Default Re: internal flappers necessary?

Ask yourself this questions, if for some reason you boat stalls while you are on plane and settles back into the water, is there away for water to rush back into the exhaust and into the motor. Because it happen to me and it hydro-locks the motor right up.
boomer is offline  
Reply With Quote
Old 08-02-2005, 03:53 PM
Join Date: Mar 2001
Location: Penfield, N.Y. USA
My Boats: Fountain 32 Fever, 1989 Checkmate Convincor GTX *SOLD*
Posts: 600
Default Re: internal flappers necessary?

You eliminate some risk if you have them, whether coming off plane or the boat sitting anchored. I have a buddy who was anchored at a beach on Lake Ontario with some big rolling waves. Water splashed into both exhausts (no flappers) and hydrolocked both engines when he went to start them. This made me replace my burned out flappers with some "no burn" flappers. They don't hurt anything and they don't take away sound but they take away one more potential problem.
WHIPLASH is offline  
Reply With Quote
Old 08-02-2005, 08:11 PM
Formula Outlaw's Avatar
Join Date: May 2003
Location: In the Mountains
My Boats: was a 89" Formula 311-SR1
Posts: 11,772
Default Re: internal flappers necessary?

Same thing (waves) happened to me on my first boat a 242 Formula with twin small blocks.

When I redid my exhaust system on my 311 Formula, including dropping the silent thunder box to go with a clean transom and lose weight, I install (from Trick Marine, another shameless plug) Eddie Marine Thunder aluminum manifolds/risers and Stainless Marine Tips with the "superflapper". I don't think it effects the decibel limit at all but it might save an engine. I wouldn't run tips again without them.
Formula Outlaw is offline  
Reply With Quote

Related Topics
Thread Starter
Last Post
General Q & A
05-04-2014 06:39 PM
On Time
General Q & A
12-17-2007 11:48 PM
General Q & A
01-04-2005 11:35 PM
General Q & A
03-26-2004 11:05 AM
General Q & A
06-13-2003 10:32 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 05:34 AM.

Copyright 2011 OffShoreOnly. All rights reserved.