prop spin in neutral (TRS)
#1
Registered
Thread Starter
Join Date: Nov 2003
Location: Osage Beach, MO
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
prop spin in neutral (TRS)
I recently purchased a boat with TRS drives, the starboard drive rotates with the shift selector in neutral (rotates faster when shifted into forward). Is this just an alignment problem with the shifter, or does the transmission need a rebuild. The previous owner claims that it has done this since he owned it (5+ years). The drives are original on a 40' excalibur hawk (1983).
#2
Registered
What type of transmissions are on it Vevet drives?
#3
Charter Member #232
Charter Member
I am guessing you are fine. See if they turn when in the water. I think what you are seeing is common and when you have the resistence of the water there they will not turn.
Jon
Jon
__________________
Put your best foot forward!
Put your best foot forward!
#4
Registered
Thread Starter
Join Date: Nov 2003
Location: Osage Beach, MO
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
They are the B.W. Velvet Drives.
As far as the spinning it occurs in the water, I have never run the engines out of the water. The prop spins enough to cause the boat to slowly drift forward.
As far as the spinning it occurs in the water, I have never run the engines out of the water. The prop spins enough to cause the boat to slowly drift forward.
#5
Registered
Join Date: Dec 2002
Location: chesapeake bay md
Posts: 959
Likes: 0
Received 0 Likes
on
0 Posts
The plates in the trans are warped and providing slight contact. They still could last quite a while in this condition. I think you will find they are reasonable to rebuild
#6
Registered
Join Date: Jan 2001
Location: Holland MI
Posts: 3,140
Likes: 0
Received 0 Likes
on
0 Posts
Yup, what mmwalters said. It might last for years or it might decide to give up tomorrow. I'm betting on giving up sooner than later, especially if you've got to shift it above 1000 rpm. It will be cheaper to fix before it gives up. Oh, by the way, when it gives up it will be locked in gear.
#7
Offshoreonly Advertiser
Offshoreonly Advertiser
what they said
__________________
Marc
www.mercruiserparts.com
www.go-fast.com
www.bammarine.com
www.cyborgtransmissions.com
It's not alive -www.BoatStuffExpress.com - temporarily retired
Marc
www.mercruiserparts.com
www.go-fast.com
www.bammarine.com
www.cyborgtransmissions.com
It's not alive -www.BoatStuffExpress.com - temporarily retired
#8
Charter Member #232
Charter Member
Yup now that I know it is in the water doing it I agree with these guys. Mine spins a very little out of the water and that is what I thought you were talking about. I also agree that it would probably be cheaper to fix it now then after total detonation. I hear that Marc is sapposed to be VERY good at rebuilding them. Also Huber is another good one.
Jon
Jon
__________________
Put your best foot forward!
Put your best foot forward!
#9
Charter Member
Charter Member
A buddy of mine has a TRS with the same problem-will actually move the boat forward slightly. A really good trans builder that is also a friend of ours said to run it in neutral like that at about 2000 for a few minutes to loosen up the clutch pack-might be worth a shot before the rebuild. If it scuffs a little off the clutches they might not drag any more.
#10
Registered
I have had the same problem many times
Inside the Velvet drives are steel shims with
clutches. What usually occurs is what everyone above has mentioned. Removal of the trans will be nessary.
The cluches are rings normaly flat when placed on a flat surface. Chances are when you remove them and lay one on a flat surface it will be concave. shaped like a cone. I can tell just by spinning the prop on the trailer
if it is hard to spin the clutches are getting warped again. This causes friction against the shims which is what causes the movement of the prop when your actualy in neutral.
The borg and warner velva drive is a very simple transmission inwhich any transmission shop surely could handle.
Contact Bam Marine they have some excellent high performance replacements.
954-545-8681
Simplicity marine drives also offers the original cluches.
941-722-8475
Good luck
Gerry
Inside the Velvet drives are steel shims with
clutches. What usually occurs is what everyone above has mentioned. Removal of the trans will be nessary.
The cluches are rings normaly flat when placed on a flat surface. Chances are when you remove them and lay one on a flat surface it will be concave. shaped like a cone. I can tell just by spinning the prop on the trailer
if it is hard to spin the clutches are getting warped again. This causes friction against the shims which is what causes the movement of the prop when your actualy in neutral.
The borg and warner velva drive is a very simple transmission inwhich any transmission shop surely could handle.
Contact Bam Marine they have some excellent high performance replacements.
954-545-8681
Simplicity marine drives also offers the original cluches.
941-722-8475
Good luck
Gerry