Reply With Quotemy engine mounts came a little loose and caused similar feelings of vibration....not related to exh but check anyway maybe the installer forgot to tighten the jam nuts..
have takin out the slip in mufflers,when in drive hear a vibration from the exhaust? could also feal it in the floor had rpms at 850-925 i have about 30hrs
on the motor no mods. if i bump past it to 1000 rpm goes away?
any and all input is appreciated!!!
thanks and tgif
p.s did not have this when exhaust muff in place
my engine mounts came a little loose and caused similar feelings of vibration....not related to exh but check anyway maybe the installer forgot to tighten the jam nuts..
my engine mounts came a little loose and caused similar feelings of vibration....not related to exh but check anyway maybe the installer forgot to tighten the jam nuts..
u may have flappers in the exhoust system that keeps water from intering the system when sitting in the water.my boat dose the same thing at low rpm.sounds like something comming apart.put ur hand on the pipe to see if u can feel it towards to end of the out let
Yes, that is true. We removed the exhaust mufflers and installed the dana shorties with the flap. At low rpm it will rattle. It freaked me out too. Check everything else out just to make sure. But that sounds like the problem.
Below 1000, the flappers are clanging in the tube. Above 1000, they are held away from the pipe.
I just took a long chisel and knocked off the weld on either side of the flapper. Removed the metal ones and left the black rubber ones on the end.
Mercruiser demands two forms of reversion protection for warranty. One is sufficient.
the flappers are external just wrap around outer pipe tip
did not have noise when mufflers in
possible ecm reaction to less back pressure?
or just paranoid
but there always watching
my engine mounts came a little loose and caused similar feelings of vibration....not related to exh but check anyway maybe the installer forgot to tighten the jam nuts..
Yep Engine mounts.
baffles / flappers :idea:
normal
while motor is at idle, pop hatch, place hand on pipe and you can confirm the vibration and feel the flappers...
listen carefully...
hope all is well with you and the girls, c ya soon!
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