Go Back  The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > The Boating Forum
Reload this Page >

Verado 350, replace powerhead, lower unit blows.

Notices
The Boating Forum

Verado 350, replace powerhead, lower unit blows.

Old 05-22-2019, 06:31 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Aug 2005
Location:
Posts: 121
Likes: 0
Received 12 Likes on 4 Posts
Default Verado 350, replace powerhead, lower unit blows.

We have a pair of 350 verados. At about 1200 hours we have a powerhead issue, spend a lot of money to find a piston head has carb build up and damage, replace the piston head. The engine lasts a few more hours then powerhead failure again, mechanic just says we need a new powerhead so we order one, wait, and they replace it.

On the test run the lower unit blows out. Mechanic says it wasnt their fault and just tells us to buy a new lower unit. Says the gears failed inside and when opened up there was metal all within it.

Every 100 hrs like clockwork the boat goes in for service at the same place, they have done all the work on the engine.

Mechanic says they didnt touch the lower unit in the powerhead replacement.

Any thoughts on this? What are the odds that the lower unit fails at the exact same time?

Thanks for any input or questions to ask.
Old 05-22-2019, 06:39 AM
  #2  
Senior Member
 
Join Date: Apr 2017
Location: Eh?
Posts: 1,718
Likes: 0
Received 800 Likes on 441 Posts
Default

Did the nav lights stop working at the same time?
Old 05-22-2019, 06:42 AM
  #3  
Senior Member
 
Join Date: Aug 2018
Posts: 107
Likes: 0
Received 64 Likes on 30 Posts
Thumbs down

Originally Posted by Blazer7420 View Post
Did the nav lights stop working at the same time?
A truly insightful and helpful post... you win the internet
Old 05-22-2019, 07:00 AM
  #4  
Senior Member
 
Join Date: Apr 2017
Location: Eh?
Posts: 1,718
Likes: 0
Received 800 Likes on 441 Posts
Default

Originally Posted by jcbrown630 View Post
A truly insightful and helpful post... you win the internet
Yeah well, figured that would get blamed on the tech also.
Lower unit took a dump, that's it, coincidence.
What would changing the powerhead have to do with the lower unit?
Likes:
Old 05-22-2019, 07:01 AM
  #5  
Senior Member
Thread Starter
 
Join Date: Aug 2005
Location:
Posts: 121
Likes: 0
Received 12 Likes on 4 Posts
Default

Originally Posted by Blazer7420 View Post
Yeah well, figured that would get blamed on the tech also.
Lower unit took a dump, that's it, coincidence.
What would changing the powerhead have to do with the lower unit?
This is what i was trying to get input on. Thanks for the typical THT f@cktard post.
Old 05-22-2019, 07:05 AM
  #6  
Senior MemberCaptains Club Member
 
Join Date: Oct 2002
Location:
Posts: 700
Received 234 Likes on 106 Posts
Default

Did they do a full service of the lower unit too when they replaced the power head ?

I would think a lower unit service would have revealed metal shavings or signs of imminent failure.
Old 05-22-2019, 07:14 AM
  #7  
Senior Member
 
Join Date: Nov 2010
Location: Medina/Catawba Is Ohio
Posts: 1,026
Received 114 Likes on 95 Posts
Default

probably would have let go Sooner than later new power head old l/u. I know its frustrating but things happen that way. in my mind I would ?? 100 hr maint metal should have been found at last maint if l/u oil was changed.
Likes:
Old 05-22-2019, 07:37 AM
  #8  
Admirals Club Admiral's Club Member
 
Join Date: Dec 2016
Location: On the Ocean
Posts: 3,671
Received 1,568 Likes on 786 Posts
Default

1,200 hours on a lower unit is significant. I just made a post in a thread involving lower units and Parker Yachts responded that the port counter rotating LU tends to take a beating and often goes first. The thread involves replacing a cooling tube in the lower unit if you want to read that response.
All I can say is we didn't choose an inexpensive hobby. I figure my fresh fish is costing me at least $100 per pound and that's on a good day.
Old 05-22-2019, 07:47 AM
  #9  
Senior Member
 
Join Date: Dec 2014
Location: Land down under
Posts: 14,662
Received 3,340 Likes on 1,993 Posts
Default

Originally Posted by jcbrown630 View Post
A truly insightful and helpful post... you win the internet
He is actually making a very valid comment.
Old 05-22-2019, 07:50 AM
  #10  
Senior Member
 
Join Date: Oct 2010
Location: Bradenton FL
Posts: 2,288
Received 818 Likes on 368 Posts
Default

Agree with above post. At least you got over 1,000 hours out of your L/U. It's likely a coincidence. You don't always find metal during maintenance. Sometimes they just go and when your running 4,000 + RPM it makes a real mess.
Likes:
Old 05-22-2019, 07:52 AM
  #11  
Senior Member
 
Join Date: Dec 2014
Location: Land down under
Posts: 14,662
Received 3,340 Likes on 1,993 Posts
Default

Regarding the odds, it is extremely, extremely, extremely unlikely for the lower unit to fail just when the new power plant was installed. But then folks win the power ball with lesser odds.

Other than the new power plant possibly making more power than the old tired power plant, there is virtually no connection between a new power plant being installed and a lower unit failing. Nothing that the mechanic can be faulted for.

This falls into the category of sh1t happens. Been there and have had it happen to meself.
Old 05-22-2019, 07:54 AM
  #12  
Senior Member
 
Join Date: Dec 2014
Location: Land down under
Posts: 14,662
Received 3,340 Likes on 1,993 Posts
Default

Originally Posted by bw17 View Post
Did they do a full service of the lower unit too when they replaced the power head ?

I would think a lower unit service would have revealed metal shavings or signs of imminent failure.
Probably not. Why would they have?
Likes:
Old 05-22-2019, 07:55 AM
  #13  
Senior Member
 
Join Date: Dec 2014
Location: Land down under
Posts: 14,662
Received 3,340 Likes on 1,993 Posts
Default

Originally Posted by l_bones View Post
This is what i was trying to get input on. Thanks for the typical THT f@cktard post.
What answer did you want to get?

Tell us. Someone will regurgitate the answer you want to you. Life will be good.
Old 05-22-2019, 07:56 AM
  #14  
Senior Member
 
Join Date: Dec 2014
Location: Land down under
Posts: 14,662
Received 3,340 Likes on 1,993 Posts
Default

Hey, I had my lower unit replaced on my Yamaha XF425. The damn trim and tilt unit then crapped out.

Yamaha won't give me a new motor. Damn that company. They are not to be trusted.
Old 05-22-2019, 07:57 AM
  #15  
Senior Member
 
Join Date: Jun 2011
Posts: 399
Received 156 Likes on 74 Posts
Default

I can't think of any reason that changing the powerhead would affect the lower unit. Change it out and you can rest easy knowing that you now have fresh major components in your engine. It may be worth checking with Merc reman to see what they would give you for trade in value on your engine with the bad gearcase. I have heard that sometimes people can get a good chunk of change trading in with reman then buying a new or reman engine for not much more than the trade in value plus lower unit replacement cost. They may offer you more with your new replaced powerhead since it should basically have less than 1 hour on it. I have no first hand experience, but I would look into it if in your shoes..

Last edited by Diesel Dawg; 05-22-2019 at 08:05 AM.
Likes:
Old 05-22-2019, 08:01 AM
  #16  
Senior Member
Thread Starter
 
Join Date: Aug 2005
Location:
Posts: 121
Likes: 0
Received 12 Likes on 4 Posts
Default

Originally Posted by alloyboy View Post
What answer did you want to get?

Tell us. Someone will regurgitate the answer you want to you. Life will be good.
His followup answer and insight from you and others is what I was looking for. Not a smartass random comment about navlights. Which probably will fail next, thanks.

Likes:
Diesel Dawg, FL Local, Pippsturr, SCAngler, TaylorMad1, Travisk and 1 others liked this post. (Show less...)
Old 05-22-2019, 08:09 AM
  #17  
Senior Member
 
Join Date: Dec 2014
Location: Land down under
Posts: 14,662
Received 3,340 Likes on 1,993 Posts
Default

Originally Posted by l_bones View Post
His followup answer and insight from you and others is what I was looking for. Not a smartass random comment about navlights. Which probably will fail next, thanks.
Speaking of lights, this is an honest to God true story.

Many many years ago I worked on airplanes. I changed a wheel and tire. The owner of the airplane then noticed a navlight being out and wanted to know what I was going to do about it. His thought process was that the light worked when he dropped the airplane off and did not work when he next went to use it. His rationale was that it was something that I did. Happened on my watch and I should pay for the part and labour to fix it.

I swear, I never went near the wing. Never even applied electrical power to the aeroplane. He went away convinced that he was being screwed.

So it goes.
Old 05-22-2019, 08:16 AM
  #18  
Senior MemberCaptains Club Member
 
Join Date: Apr 2002
Location: Columbia,S.C.
Posts: 3,765
Received 50 Likes on 38 Posts
Default

My guess is that there is no relationship
between the new powerhead and the LU crapping out . Good luck
Old 05-22-2019, 08:25 AM
  #19  
Admirals Club Admiral's Club Member
 
Join Date: Apr 2010
Posts: 243
Received 48 Likes on 37 Posts
Default

Sounds like it was just time for those gears to fail, don't have to see shavings sometimes its a catastrophic failure of a part that daisy chains into many gears being blown apart.
Likes:
Old 05-22-2019, 08:38 AM
  #20  
Senior Member
Thread Starter
 
Join Date: Aug 2005
Location:
Posts: 121
Likes: 0
Received 12 Likes on 4 Posts
Default

Thanks all for the insight! New lower unit it is, going to check into Mercury Remanufacturing to send back the blown parts also.

When it rains it pours, B-O-A-Ten-T.
Likes:

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.