Yanmar super vibration - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
 Not a Member? 

Diesel This is a forum dedicated to diesel engines and their applicable accessories.


Like Tree13Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 04-03-2014
Junior Member
 
Join Date: Apr 2014
Location: southeast Asia
Posts: 16
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
meanderboy is on a distinguished road
Yanmar super vibration

MY YANMAR 3YM30 IS SHAKING ITSELF TO BITS. It is 9 years old and 3000 hours and has run perfectly until 30 hours ago. The engine runs perfectly in neutral to full RPM. It also runs smoothly in reverse at all speeds. In forward gear, it runs ok until I shift into neutral and try to shift back into forward.

Then the engine starts to shake at 1000rpm and shakes horribly and starts a clacking / grinding noise at anything over 1200 rpm. It is truly frightening

On the advice of the Singapore dealer, I replaced the engine mounts and vibration damper. No improvement at all.

Finding an available mechanic here is very difficult, so any suggestions what to look into would be most appreciated.
Reply With Quote Share with Facebook
  #2  
Old 04-03-2014
Fstbttms's Avatar
I don't discuss my member
 
Join Date: Feb 2003
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 2,062
Thanks: 3
Thanked 18 Times in 18 Posts
Rep Power: 12
Fstbttms will become famous soon enough
Re: Yanmar super vibration

Better have a look at the running gear.
Reply With Quote Share with Facebook
  #3  
Old 04-03-2014
jsaronson's Avatar
Senior Member
 
Join Date: Dec 2011
Posts: 851
Thanks: 3
Thanked 23 Times in 23 Posts
Rep Power: 3
jsaronson is on a distinguished road
Re: Yanmar super vibration

Cutlass bearing?
christian.hess likes this.
Reply With Quote Share with Facebook
  #4  
Old 04-03-2014
Melrna's Avatar
Crazy Woman Boat Driver
 
Join Date: Apr 2004
Location: New Bern NC
Posts: 783
Thanks: 16
Thanked 13 Times in 10 Posts
Rep Power: 11
Melrna will become famous soon enough
Send a message via AIM to Melrna Send a message via Yahoo to Melrna
Re: Yanmar super vibration

Bent shaft.
__________________
Melissa Renee
Moondance
Catalina 445, Hull #90
Reply With Quote Share with Facebook
  #5  
Old 04-03-2014
PaulinVictoria's Avatar
Senior Member
 
Join Date: Aug 2009
Location: Sidney, BC
Posts: 1,878
Thanks: 7
Thanked 45 Times in 44 Posts
Rep Power: 6
PaulinVictoria is on a distinguished road
Re: Yanmar super vibration

If you go back into neutral and into forward again, does the problem go away? If not, if you back and forth a few times does it go away? Sounds like something isn't engaging in the gearbox (or transmission if you want to be all American about it). Could be something as simple as a cable adjustment needed, make sure when you are in gear that the shift lever on the gearbox is fully engaged.
__________________
Orange Crush
1974 C&C27 MkII

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #6  
Old 04-04-2014
trantor12020's Avatar
Senior Member
 
Join Date: Mar 2006
Location: Singapore
Posts: 674
Thanks: 2
Thanked 10 Times in 10 Posts
Rep Power: 9
trantor12020 is on a distinguished road
Re: Yanmar super vibration

Quote:
Originally Posted by meanderboy View Post
MY YANMAR 3YM30 IS SHAKING ITSELF TO BITS. It is 9 years old and 3000 hours and has run perfectly until 30 hours ago. The engine runs perfectly in neutral to full RPM. It also runs smoothly in reverse at all speeds. In forward gear, it runs ok until I shift into neutral and try to shift back into forward.
Then the engine starts to shake at 1000rpm and shakes horribly and starts a clacking / grinding noise at anything over 1200 rpm. It is truly frightening
On the advice of the Singapore dealer, I replaced the engine mounts and vibration damper. No improvement at all.
Finding an available mechanic here is very difficult, so any suggestions what to look into would be most appreciated.
What is a vibration damper? Where is it mounted?
I suppose you're based in Singapore? You could dismantle the gearbox and bring it to CLLS for them to service or contact Bobby Ee from Esgrit for some help/repair.
__________________
Ken
2002 Hunter 326, SV Millennium 2
1999 Macgregor 26X, SV Millennium
Reply With Quote Share with Facebook
  #7  
Old 04-04-2014
Member
 
Join Date: Dec 2010
Posts: 54
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 4
NCboatrx is on a distinguished road
Re: Yanmar super vibration

Have you actually checked your propeller? What you are describing is a classic symptom with a worn folding or feathering propeller or a bent blade on a fixed propeller.
__________________
Stanley,
Marine Diesel Engine Vendor
Reply With Quote Share with Facebook
  #8  
Old 04-04-2014
Junior Member
 
Join Date: Apr 2014
Location: southeast Asia
Posts: 16
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
meanderboy is on a distinguished road
Re: Yanmar super vibration

just replaced cutlass 2 months ago. no play at all now.

Last edited by meanderboy; 04-04-2014 at 10:16 AM. Reason: incomplete
Reply With Quote Share with Facebook
  #9  
Old 04-04-2014
Junior Member
 
Join Date: Apr 2014
Location: southeast Asia
Posts: 16
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
meanderboy is on a distinguished road
Re: Yanmar super vibration

23 inch shaft is good on dial guage
Reply With Quote Share with Facebook
  #10  
Old 04-04-2014
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 14,699
Thanks: 68
Thanked 197 Times in 189 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Re: Yanmar super vibration

I'm leaning towards a folding prop that's failing to fully open in forward at times.

On a former boat we got into the habit of spinning briefly in reverse before going forward - usually dealt with it.
christian.hess likes this.
__________________
Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)

Last edited by Faster; 04-04-2014 at 10:25 AM.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
yanmar vibration at low rpm 17spyglass17 Diesel 2 03-04-2014 12:42 PM
Super Starters Audi Azzurra Sailing Team Lead The 52 Super Series NewsReader News Feeds 0 05-25-2012 09:20 AM
Vibration ! dbruce85 Boat Review and Purchase Forum 3 12-01-2008 11:14 PM
Vibration mtbmike Gear & Maintenance 7 05-28-2006 12:14 PM
Vibration mtbmike Gear & Maintenance 5 05-26-2006 11:55 AM


All times are GMT -4. The time now is 03:30 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.