Logo
FULL SITE MENU

V-Drive Trans 5000 noise

K

kimosammy

Contributing Member
On my 98 Carver Mariner I have a couple V-Drive Transmissions making some noise.
The sound is close to rolling two aluminum trash lids togther.
It started some time back only in reverse, now SB side forward and reverse and getting louder.
Any ideas? I'm guessing dampner plates?
 
Update - The propeller turns slowly in neutral with the motor running.
I asked Harbor Marine in Everett, Wa for hands on inspection.
They believe it’s the dampener plate..
An issue which should be addressed as soon as possible.
I'll have it serviced very soon and update results here.
 
IF--repeat--IF your motor is not idling smoothly, the damper plate will make all kinds of noise. I suggest you get a competent marine mechanic to make absolutely sure the motor is okay before replacing the damper plate (a major job).

Jeff

PS: Lacking flexible mounts, marine engines stubbornly refuse to rock back and forth when they are idling rough--the dumb things just sit there and take it! It takes a good mechanic, with a vacuum gage, to get them idling smoothly--and that presupposes that there are no igniting of valve sealing problems.
 
Wouldn’t the propeller turning while at idle in neutral be a indication of transmission issue?
 
Last edited:
Clutch pack warped in all likelyhood. How fast? does the boat actual travel in neutral? if so, plan on a forward clutch pack job. As noted before, this is not related to noise; as noted before, low speed ONLY noise is likely due to rough engine, could be damper plate, can't say from way over here.. Do a good tune up first if it's been awhile.
 
I've seen many damper plates replaced unnecceasarily when the engines were misfiring on 1 or 2 cylinders. Make sure the engine is properly tuned and has good compression first.
 
Update - All cylinders in both engines have a compression between 120 and 122.
Timing was spot on for the SB side, which has the trans problem.
The Port was off by 4 degrees.
Next stop, Harbor Marine in Everett.
 
Update - Compression was not 120 but 140 to 142, for both motors, mechanic retested.
Dockside, not sure if I'm on the same page as which you write but I asked the mechanic to do timing as well.
He said timing on Port was off by 4 degrees and SB was on spot. He tuned them both.
From his experience, he said they strong running engines.
Did I miss the point? Compression and tune-up was successful.

A couple items I didnt mention may shed some light here too. This boat had a land strike in its past.
Currently, I've replaced the both SB and Port props, the SB side prop threw a blade while I was doing about 3600 rpm.
Replaced the Port rudder, it was bent and cracked.
All motor mounts were bent, which were replaced.
Both prop shafts were found to be bent, those were addressed too.

Heads up for the rest of us....get a reputable person to do your survey....
 
Last edited:
Update - Boat went to shop.
Found V-drive and trans to have serious damage.
V-drive, dampner plate replaced and Trans rebulit.
Will be back in the water soon.
 
Last edited:
Update -Many gear fragments were found.
In two gears, chunks were missing from the gear teeth.
She tested good and is running better then ever before.
Lesson learned–
1) Grinding noise when shifting into forward orreverse while at low RPM's - Sounds like gravel in a cement mixer or rolling two aluminum trashcan lids together. If you know you haven’t had a land strike or hit a submergedobject, start with a tune-up, do a compression check and test for misfiring.
2) Packing leaks after multiple adjustments - Ifyou find yourself repeatedly tightening the packing after running, more than likelyit’s from a bent prop shaft or corrosion under the packing area.
3) Bad mechanical\hull surveyor – do betterresearch then what I did.
 
Back
Top