Boats For Sale:
Knocking comming from Drive area |
Post Reply 
|
| Author | |
80nauts 
Groupie 
Joined: March-19-2005 Location: United States Status: Offline Points: 93 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: Knocking comming from Drive areaPosted: August-15-2005 at 8:00pm |
|
When I first put my boat in the water and idle in gear then I hear a slow knocking sound till I take off. When the boat warms up the noise is gone. Any ideas on how to find out what is going on?
The transmission seems to be running smooth and the sound seems to be inbetween the trans and prop area. The prop is tight. Thanks for any Ideas...This website is great. |
|
 |
|
|
ultrahots
Gold Member 
Joined: September-08-2004 Location: United States Status: Offline Points: 618 |
Post Options
Thanks(0)
Quote Reply
Posted: August-16-2005 at 1:29am |
|
Coupler between motor and trans ? I have seen a few make noises in the past.When you load the boat the noise goes away.
|
|
|
|
|
GottaSki
Grand Poobah 
Joined: April-21-2005 Location: NE CT Status: Offline Points: 3333 |
Post Options
Thanks(0)
Quote Reply
Posted: August-16-2005 at 9:28am |
|
And most velvet drives knock if the idle is too low or eratic, it doesn't take much.
|
|
|
"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
|
|
|
|
mackwrench
Senior Member 
Joined: February-25-2005 Location: Gone Status: Offline Points: 190 |
Post Options
Thanks(0)
Quote Reply
Posted: August-16-2005 at 12:51pm |
|
Sounds like the engine/trans coupler is bad.
This subjuect has come up a few times here and thats the common cause... |
|
|
NO LONGER A MEMBER
|
|
|
|
|
guest
Guest 
|
Post Options
Thanks(0)
Quote Reply
Posted: August-19-2005 at 3:36pm |
|
damper plate? is that the coupler?
|
|
|
|
|
mackwrench
Senior Member
Joined: February-25-2005 Location: Gone Status: Offline Points: 190 |
Post Options
Thanks(0)
Quote Reply
Posted: August-19-2005 at 4:30pm |
|
correct
|
|
|
NO LONGER A MEMBER
|
|
|
|
|
80nauts
Groupie
Joined: March-19-2005 Location: United States Status: Offline Points: 93 |
Post Options
Thanks(0)
Quote Reply
Posted: August-20-2005 at 4:35am |
|
I replaced one of those on a friends boat. I hope it doesn't mean it will fail. I just don't want to be stuck on the lake somewhere.
|
|
|
|
|
88skisupreme
Guest
|
Post Options
Thanks(0)
Quote Reply
Posted: August-22-2005 at 4:38pm |
|
is there an old thread or online guide about changin the damper plate? I think my boat needs one two. look like a big job to seperate the tranny.
|
|
|
|
|
80nauts
Groupie
Joined: March-19-2005 Location: United States Status: Offline Points: 93 |
Post Options
Thanks(0)
Quote Reply
Posted: August-23-2005 at 8:58am |
|
I upped the idle a little bit and the knocking is all but gone. I guess it is just noisy at a low idle. I wonder if it has something to do with a relationship between centrifical force or whatever and engaging completely into drive.
|
|
|
|
|
tommer12
Senior Member
Joined: February-05-2004 Location: United States Status: Offline Points: 366 |
Post Options
Thanks(0)
Quote Reply
Posted: September-16-2005 at 11:04pm |
|
If it's a velvet drive, it's probably the damper plate between the tranny and the engine. There are 4-5 springs around the plate that rust out over time. I had mine replaced on my old 84' for about $500 a dealer. PCM makes a replacement plate for about $150, then the rest is labor. Pull the tranny out, pop the old plate, put the new plate on, reinstall tranny.
there is another thread here on it. cheers tc |
|
|
|
|
Bob's2001
Senior Member
Joined: March-28-2005 Location: Lake Jackson TX Status: Offline Points: 241 |
Post Options
Thanks(0)
Quote Reply
Posted: September-17-2005 at 8:42pm |
|
Mine was knocking like that just before it quit. It felt a little stiff going into gear that day and just quit going while I was up on ski. At least we all got a turn before it quit. I'm pulling the trans to see what's broke.
|
|
|
Bob Ed
83 2001 |
|
|
|
|
Post Reply
|
|
Tweet
|
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Topic Options