Reply
 
Thread Tools Search this Thread
 
Old 21 May 2006, 20:08   #1
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
noisy exhaust after wave

If Iam cruising along in my sib when its a bit rough the engine sounds noisy after going over a wave .

As the boat lifts and the motor revs a little higher its as if an air bubble has formed around the exhaust and the exhaust note is louder from then on until
I stop and get going again .
Once on the plane again its fine for a while until the motor revs a little over a wave and its noisy again. until i stop or turn

I don't seem to lose any power .

Iam sure an air pocket is forming behind the exhaust outlet ,
Main concern is that it may be causing some damage to the engine . Water is pumping fine when it happens there is no change in the outlet stream .
__________________

__________________
ian parkes is offline   Reply With Quote
Old 21 May 2006, 20:52   #2
Member
 
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
Sounds like your engine is lifting out of the water. Possibly your exhaust is leaving the water and therefore is losing most of its baffle.

Doesn't sound like anything to worry about unless your losing power as well.
__________________

__________________
Biggles is offline   Reply With Quote
Old 22 May 2006, 03:37   #3
Member
 
benc's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Intrepid
Make: Tornado
Length: 7m +
Engine: Twin 150 Yamaha HPDI
MMSI: 235066402
Join Date: Mar 2005
Posts: 1,319
Send a message via Skype™ to benc
If the tale tale is still doing its job then you are getting the water around your engine that it needs. So as biggles says, sounds like you should be fine.
__________________
benc is offline   Reply With Quote
Old 22 May 2006, 04:35   #4
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
Thanks
Its just the sound thats a little anoying .
If I stop and get going again its fine until that wave comes .
__________________
ian parkes is offline   Reply With Quote
Old 22 May 2006, 08:06   #5
Member
 
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
Is the engine a little high on the back of the transom ?

Also is it locked down so it won't lift up ?
__________________
Biggles is offline   Reply With Quote
Old 22 May 2006, 08:24   #6
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
engine certainly doesn't seem too high and it is locked down so its not lifting .
__________________
ian parkes is offline   Reply With Quote
Old 22 May 2006, 09:17   #7
Member
 
Hugh Jardon's Avatar
 
Country: UK - England
Town: Reading, Hants
Boat name: Juicy
Make: Sealine F43
Length: 10m +
Engine: 2 x 370hp
MMSI: TBC
Join Date: Sep 2005
Posts: 2,882
we can have a good listen at the weekend, and get some views on as there will be a few of us in pentewan this weekend
__________________
Hugh Jardon is offline   Reply With Quote
Old 22 May 2006, 09:20   #8
Member
 
Richard B's Avatar
 
Country: UK - England
Town: Devon
Boat name: White Ice
Make: Ranieri
Length: 5m +
Engine: Suzuki 115hp
Join Date: Jul 2002
Posts: 5,015
Keep your eye on what the exhaust relief port is doing.
Richard B is offline   Reply With Quote
Old 22 May 2006, 11:06   #9
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
Hopefully it will be calm this weekend and won't do it .
__________________
ian parkes is offline   Reply With Quote
Old 22 May 2006, 13:52   #10
Member
 
Country: Other
Town: Oakley
Boat name: Zerstörer
Make: Ribcraft
Length: 5m +
Engine: Suzuki DF 140
MMSI: 235050131
Join Date: Jun 2003
Posts: 3,931
Quote:
Originally Posted by ian parkes
Hopefully it will be calm this weekend and won't do it .
Heres hoping with you.
__________________

__________________
Biggles is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 16:52.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.