Notices
The Boating Forum

Suzuki df 300 lower unit shavings

Old 12-12-2019, 05:15 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Jun 2013
Posts: 235
Likes: 0
Received 26 Likes on 22 Posts
Default Suzuki df 300 lower unit shavings

Hey guys

My 2012 engines have 600 hours. I do regular lower unit oil changes every 50 hours. I just recently did the 600 hour lower unit oil change and noticed one of the drain plugs had a pretty large amount of shavings in thin slices. It does not appear to be normal however I donít know whatís going on exactly. Can someone please advise.

thank you.

Left Port and right starboard
Old 12-12-2019, 05:31 PM
  #2  
Senior MemberCaptains Club Member
 
Join Date: Oct 2006
Location: Miami,FL
Posts: 1,186
Likes: 0
Received 143 Likes on 94 Posts
Default

Can you feel the shavings? Or if you rub it does it feel like sand. If sand like then I would say normal. If its actual shaving then not good.
Old 12-12-2019, 05:34 PM
  #3  
Senior Member
Thread Starter
 
Join Date: Jun 2013
Posts: 235
Likes: 0
Received 26 Likes on 22 Posts
Default

You can definitely feel it. very thin slices of metal.
Old 12-12-2019, 05:38 PM
  #4  
Senior Member
 
Join Date: Nov 2009
Location: Australia
Posts: 4,072
Received 321 Likes on 248 Posts
Default

Can you spin the prop shaft on that engine and check to see if its bent?
Old 12-12-2019, 05:39 PM
  #5  
Senior MemberCaptains Club Member
 
Join Date: Oct 2006
Location: Miami,FL
Posts: 1,186
Likes: 0
Received 143 Likes on 94 Posts
Default

I am no expert but I would say that's not a good sign. I would have it opened up before it blows. Happend to me.
Old 12-12-2019, 06:00 PM
  #6  
Senior Member
Thread Starter
 
Join Date: Jun 2013
Posts: 235
Likes: 0
Received 26 Likes on 22 Posts
Default

Iíve had horrible experience with the Suzuki lower units. Both motors have had the main shafts snap/brake half way down. And now this.
Old 12-12-2019, 07:35 PM
  #7  
Senior Member
 
Join Date: Jul 2013
Posts: 596
Received 67 Likes on 55 Posts
Default

Originally Posted by RAMY View Post
I’ve had horrible experience with the Suzuki lower units. Both motors have had the main shafts snap/brake half way down. And now this.
That much metal is not good. Could be debris left over from the repair. I know you said you had issues with the lower units but I am only asking, did you hit anything . It takes a lot to break a shaft. I am only guessing but
if that shop didn't flush out the lower unit and took the time to do it right , you might be seeing debris from the first break. OMO.. Obviously change the oil , run it a few hours and change it again to see if you have any more debris.
Old 12-13-2019, 01:30 AM
  #8  
Senior MemberCaptains Club Member
 
Join Date: Mar 2002
Location: Pensacola, FL
Posts: 5,283
Received 264 Likes on 172 Posts
Default

Definitely not normal.
Old 12-13-2019, 03:08 AM
  #9  
Senior Member
Thread Starter
 
Join Date: Jun 2013
Posts: 235
Likes: 0
Received 26 Likes on 22 Posts
Default

no I have never hit anything. Both times the lower unit shaft snapped off I was running in the wide open ocean. No damage at all to the lower unit housing or propeller it was just a clean cut shaft. all you noticed was an increase in RPMs and a decrease in speed.


It has been 100 hours since the repair was done on this lower unit and I have changed the oil once already. That I recall it was regular shavings at that time. (work was done by International marine Mike)

I will run the boat a couple hours and check the oil again. Ill Update you guys with what I find.
Old 12-14-2019, 07:29 AM
  #10  
Admirals Club Admiral's Club Member
 
Join Date: Aug 2010
Location: Mandeville, LA
Posts: 1,329
Received 72 Likes on 50 Posts
Default

Ughhh.....start looking for a used lower unit. I hate pulling the plug on mine....always scared it's gonna look like the one shown here.
Old 12-14-2019, 07:35 AM
  #11  
Senior MemberCaptains Club Member
 
Join Date: May 2005
Location: South Florida
Posts: 9,241
Received 516 Likes on 297 Posts
Default

Originally Posted by RAMY View Post
no I have never hit anything. Both times the lower unit shaft snapped off I was running in the wide open ocean. No damage at all to the lower unit housing or propeller it was just a clean cut shaft. all you noticed was an increase in RPMs and a decrease in speed.

It has been 100 hours since the repair was done on this lower unit and I have changed the oil once already. That I recall it was regular shavings at that time. (work was done by International marine Mike)
I've done my lower units across 7 or 8 different Suzuki engines of various ages and I don't recall ever seeing the slightest amount of metal in mine, certainly not more than a flake or two or I would have freaked out. I will say that the 2nd owner of my last pair of DF300s had a driveshaft shear off similarly mysteriously, so that I'm on board with as a possible failure.

If your drive shaft sheared off, that means somebody opened up that gearcase and did a fair bit of work - sounds to me like you need to open it up again and check the clearances and make sure the gears are meshing together properly.

Maybe this is "normal" wear for the new driveshaft gear wearing in with the old lower unit gears but looks questionable to me.
Old 12-14-2019, 08:09 AM
  #12  
Admirals ClubCaptains Club MemberPLEDGER Admiral's Club Member
THT sponsor
 
Join Date: Feb 2003
Location: (snowbird in training) Lake Erie Un-salted water and shark free!
Posts: 7,265
Received 681 Likes on 362 Posts
Default

Do you know if the one with the shavings was the counter rotating motor? They supposedly wear faster.
Old 12-14-2019, 08:31 AM
  #13  
Senior Member
 
Join Date: May 2006
Location: Fort Pierce,FL
Posts: 5,532
Received 980 Likes on 634 Posts
Default

Send an oil sample out for anylysis if you still have some.
Old 01-07-2020, 02:41 PM
  #14  
Senior Member
Thread Starter
 
Join Date: Jun 2013
Posts: 235
Likes: 0
Received 26 Likes on 22 Posts
Default

Finally had some time to run the boat for about one hour. with new lower unit oil. This is what I found after pulling the plug again.


There was also a Couple smaller pieces. But this one was pretty big.

dont know if I should just run the boat or take it in.
Old 01-07-2020, 02:46 PM
  #15  
Member
 
Join Date: Jun 2014
Location: St. Augustine
Posts: 64
Likes: 0
Received 30 Likes on 19 Posts
Default

Take it in, it’s going to grenade on you
Old 01-07-2020, 02:57 PM
  #16  
Admirals Club Admiral's Club Member
 
Join Date: Dec 2008
Location: Texas
Posts: 5,833
Received 711 Likes on 395 Posts
Default

Originally Posted by RAMY View Post

There was also a Couple smaller pieces. But this one was pretty big.

dont know if I should just run the boat or take it in.

Hard call, would depend on how and where you use the boat. On a lake or river run it until it blows, if offshore might lean toward taking it in.
Might have been a one off piece that is being chopped apart and the lower will last a long time, or something could be coming apart. Only true way to know is run it, because the problem may not be apparent if the lower is taken apart and will be a replace everything and hope problem is fixed type deal.

If it makes you feel any better ran a Merc 250XS on a bass boat that was much worst for a long time before it gave.
Old 01-07-2020, 03:11 PM
  #17  
Senior Member
Thread Starter
 
Join Date: Jun 2013
Posts: 235
Likes: 0
Received 26 Likes on 22 Posts
Default

The boat is mainly used on long offshore trips. From Miami to the Bahamas.

Thatís why Iím leaning towards taking it in and hopefully itís not to bad.

Any recommendation on a good reliable shop in Miami for Suzuki.

I have used international marine and I was not impressed with the job.

outboard Specialties?
Old 01-07-2020, 03:24 PM
  #18  
Senior Member
 
Join Date: Aug 2008
Location: Fla / Curacao / WA
Posts: 4,993
Received 383 Likes on 233 Posts
Default

How long ago was the drive shaft replacement work done? How long do they warranty the work?
Old 01-07-2020, 03:28 PM
  #19  
Admirals Club Admiral's Club Member
 
Join Date: Feb 2010
Location: sebastian, floriduh
Posts: 2,130
Likes: 0
Received 80 Likes on 39 Posts
Default

Originally Posted by RAMY View Post
The boat is mainly used on long offshore trips. From Miami to the Bahamas.

Thatís why Iím leaning towards taking it in and hopefully itís not to bad.

Any recommendation on a good reliable shop in Miami for Suzuki.

I have used international marine and I was not impressed with the job.

outboard Specialties?
Outboard Specialties is a killer shop! Best guys you can deal with!
Likes:
Old 01-07-2020, 03:31 PM
  #20  
Senior Member
 
Join Date: Apr 2006
Posts: 5,408
Likes: 0
Received 1,099 Likes on 697 Posts
Default

It is possible that when the repairs was done the gears were not set up for the correct tolerances and you have a badly wearing gear. I would take it back to the repairer for a strip and fix.

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.