Notices

DF350 Lower unit seal ??

Old 07-28-2018, 04:22 PM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Aug 2001
Location: Baton Rouge, LA
Posts: 8,823
Default DF350 Lower unit seal ??


So during my 100 hour service I removed my props and found this birds nest of melted mono between the two duoprops. When I took it all out I also got what looks like a seal spring. I changed the LU oil and it was perfectly normal. My question is, is there even a seal between the two prop shafts? Seems like there would have to be. Looking for advice. Thanks.



Melted mass of mono.


Spring? That came out of the gap between the two prop shafts.


Spring again.
So during my 100 hour service I removed my props and found this birds nest of melted mono between the two duoprops. When I took it all out I also got what looks like a seal spring. I changed the LU oil and it was perfectly normal. My question is, is there even a seal between the two prop shafts? Seems like there would have to be. Looking for advice. Thanks.
MakoMyDay is offline  
Old 07-28-2018, 04:58 PM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Aug 2004
Location: Baton Rouge, LA
Posts: 2,223
Default

That surely looks like a seal spring. There has to be some sort of seal between the 2 shafts.

there may be an inner and outer seal on the shafts like a stern drive has where the driveshaft goes into the upper housing.

The outer seal is to keep water from getting between the shafts. The inner seal is what holds the oil in and keeps water out.
pooldoo73 is offline  
Old 07-28-2018, 05:56 PM
  #3  
29A
Senior Member
 
Join Date: Jan 2014
Location: Maryland
Posts: 738
Default

Found this drawing and the PL at: https://www.brownspoint.com/store/pc...l.asp?ID=19022


Name:  407a.jpg
Views: 764
Size:  164.6 KB
29A is offline  
Old 07-28-2018, 06:12 PM
  #4  
29A
Senior Member
 
Join Date: Jan 2014
Location: Maryland
Posts: 738
Default

https://www.brownspoint.com/store/pc...l.asp?ID=19008

This is the transmission (gear housing guts). 39 is the inner prop shaft and 42 is the outer prop shaft. 13 and 44 are seals.

Name:  220a.jpg
Views: 760
Size:  169.5 KB
29A is offline  
Old 07-28-2018, 07:35 PM
  #5  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Aug 2001
Location: Baton Rouge, LA
Posts: 8,823
Default

Nice. That #41looks like it.
MakoMyDay is offline  
Old 07-28-2018, 08:02 PM
  #6  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Aug 2001
Location: Baton Rouge, LA
Posts: 8,823
Default

The question is, how hard is that to change ??
MakoMyDay is offline  
Old 07-29-2018, 04:22 AM
  #7  
29A
Senior Member
 
Join Date: Jan 2014
Location: Maryland
Posts: 738
Default

#41 is listed a a thrust washer in the PL. Would guess it is #44 that the spring was in.
29A is offline  
Old 07-29-2018, 05:16 AM
  #8  
Admirals ClubCaptains Club Member Admiral's Club Member
 
Join Date: Dec 2003
Location: Elberta, AL
Posts: 1,736
Default

Originally Posted by MakoMyDay View Post
The question is, how hard is that to change ??
I have not done it, but i would think you could use a small hooked removal tool to pull the bad seal out and push the new one in with a seal setting tool of the correct size. Hopefully the hole lower unit does not have to come apart.
cold beers is offline  
Old 07-29-2018, 05:38 AM
  #9  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Aug 2001
Location: Baton Rouge, LA
Posts: 8,823
Default

I just checked-the seal is still there, I just pulled the spring out with the fishing line. I’m with you-I think I can get a new seal pressed in there pretty easily.
MakoMyDay is offline  
Old 07-29-2018, 03:50 PM
  #10  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Aug 2001
Location: Baton Rouge, LA
Posts: 8,823
Default

Bump for advice on seal removal.
MakoMyDay is offline  
Old 07-29-2018, 04:00 PM
  #11  
Admirals Club Admiral's Club Member
 
Join Date: Jun 2012
Posts: 1,029
Default

PM Mike at outboard specialties, I’d think he probably had the most experience with them and can tell you what to do.
Seasir is offline  
Old 08-16-2018, 04:11 AM
  #12  
Admirals ClubCaptains Club Member Admiral's Club Member
 
Join Date: Dec 2003
Location: Elberta, AL
Posts: 1,736
Default

How did this end?
cold beers is offline  
Old 09-14-2018, 08:56 AM
  #13  
Senior Member
 
Join Date: May 2014
Location: Lake Charles, Louisiana
Posts: 138
Default

Noticed a green slimy fluid coming out of my water intake. I brought in for 100hour service and confirmed upper seal shaft leak.

Gear fluid leaking from water intake.2018 DF350 with 95 hours. Source is upper driveshaft seal.
GottaTagIt is offline  
Old 09-25-2018, 06:43 AM
  #14  
Admirals Club Admiral's Club Member
 
Join Date: Dec 2007
Posts: 635
Default

MakoMyDay I sent you a PM and email
bcnucs is offline  
Old 10-01-2018, 11:47 PM
  #15  
Senior Member
 
Join Date: Dec 2009
Location: Stavanger, Norway
Posts: 204
Default

...this something more than one person have experienced?

- something that one needs to keep an eye on?
amerelium is offline  
Old 11-19-2018, 04:40 AM
  #16  
Admirals Club Admiral's Club Member
 
Join Date: Sep 2009
Location: Nottingham, MD
Posts: 1,868
Default

Did my 100 hour service yesterday. Water was in my lower unit. I am not the only one with a DF350 that this has happened to at 100 hours. I am taking her in to PYY Marine today. Happy to have my warranty, but this is a PITA at 100 hours and frankly, disappointing.

There is a 36 Judge with twin DF350s here in Maryland and he had the same issue at 100 hours.

Hoping a service bulletin is out there somewhere or someone at Zuke needs to be figuring this out.
bfox76 is offline  
Old 11-19-2018, 05:23 AM
  #17  
Admirals Club Admiral's Club Member
 
Join Date: Oct 2009
Location: Hoboken, NJ
Posts: 942
Default

Originally Posted by bfox76 View Post
Did my 100 hour service yesterday. Water was in my lower unit. I am not the only one with a DF350 that this has happened to at 100 hours. I am taking her in to PYY Marine today. Happy to have my warranty, but this is a PITA at 100 hours and frankly, disappointing.

There is a 36 Judge with twin DF350s here in Maryland and he had the same issue at 100 hours.

Hoping a service bulletin is out there somewhere or someone at Zuke needs to be figuring this out.
There was a bulletin to add more oil to the case. I did it at 40 hours. I wonder if adding the additional volume is to keep the seals more lubricated to stop them from failing early. I'm not a mechanic. Hopefully more issues dont show up
Brocnizer1 is offline  
Old 05-12-2019, 06:05 AM
  #18  
Member
 
Join Date: May 2019
Posts: 36
Default

Originally Posted by bfox76 View Post
Did my 100 hour service yesterday. Water was in my lower unit. I am not the only one with a DF350 that this has happened to at 100 hours. I am taking her in to PYY Marine today. Happy to have my warranty, but this is a PITA at 100 hours and frankly, disappointing.

There is a 36 Judge with twin DF350s here in Maryland and he had the same issue at 100 hours.

Hoping a service bulletin is out there somewhere or someone at Zuke needs to be figuring this out.
We loaded the boat for fishing trip yesterday and when we dropped the boat in the water there was an oil slick coming from the starboard motor. At first I thought I might have dripped some oil from the dip stick onto the lower unit as I check fluids before each trip. The oil though started bubbling up! So I call off the trip and pull the boat.

I just checked the lower unit fluids 20 hours prior and they were perfect and had approx 40 hours use on them. I pulled the prop to look for fishing line, none found. I check the lower unit oil and I got about half cup of clear water and stopped. Probably alot more in there.

I brought the boat to the dealer but they have a 3 week lead time to diagnose. Bummer man. My DF350s have 160 hours. On top of this my C10 gauge stopped working about 2 weeks ago.

I read a bunch on here, seems like zuke may have an issue. I hope it isn't major as we did a trip 2 weeks ago running a total of 220miles over 10 hours. Question is how long did I run the motors in this condition. I hope the lower isn't toast.
Empire is offline  
Old 05-12-2019, 04:04 PM
  #19  
Senior MemberCaptains Club Member
 
Join Date: Jul 2002
Location: NE North Carolina
Posts: 1,496
Default

That sucks. A couple of other mentions have been made on THT about water getting into the lower units. Hopefully you can get back on the water ASAP.
Capt. Fred is offline  
Old 05-23-2019, 07:11 PM
  #20  
Member
 
Join Date: May 2019
Posts: 36
Default

Dealer finally got to my motors. Said something is not "right" and they need to consult with Suzuki . I asked if it was seals and they said " we need to talk with Suzuki"

Man, I'm bummed.
Empire is offline  

Thread Tools
Search this Thread