tapping noise

D

DJD

Cadet
Joined
Mar 23, 2019
Messages
14
just fired up the engine 1st time for the season..there is a tapping noise seems to be coming from the left side towards the back no particular pattern to it.....seems to be more pronounced at lower rpm's did not make this noise last fall when I hauled the boat out after fogging any ideas on this ? thanks
 
GA_Boater

GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
What motor? May be a shutter clacking at idle or a little above.
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,137
Ayuh,.... Burnt up shutters is my guess,...... they live at the very top of the y-pipe, under the rubber boot,.....
 
GA_Boater

GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
They all worked - Each of the 4. The video is the 2nd "pic" or image.
 
Lou C

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
13,127
I tracked down a sound like that with my mechanic's stethoscope. On my OMC Cobra the flappers are fiberglass/rubber and they will make a lower pitched knocking noise sounds like an engine knock but with the scope you can hear exactly where its coming from. Port side flapper. Damn near drove me nuts after I did my top end overhaul.
 
Lou C

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
13,127
FreeBeeTony said:
Definitely the exhaust shutters..........
Click to expand...

PS Tony you got your boat in yet? I gotta find someone good to do my bottom paint, I will do the drive but will not do the bottom, you know anybody good, western Suffolk Cty?
 
Lou C

Lou C

Supreme Mariner
Joined
Nov 10, 2002
Messages
13,127
Ahh sounds nice...weather will be good...I'm going up to Lime Rock Park in Ct for a Trans Am race....I've thought of doing it myself....but lying under the boat sanding that toxic stuff is just not for me...mine was done with the hard epoxy Pettit Unipoxy so it has to be done every year. I thought of getting it all taken off and going with a multi season ablative...if I didn't have to sand..that would be different....
 
You must log in or register to reply here.
Top