Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 21-09-2017, 05:44   #1
Registered User
 
leefromcanada's Avatar

Join Date: Nov 2012
Location: Hamilton, Ontario, Canada
Boat: Luger Tradewinds 26
Posts: 37
Yanmar rattle

6 weeks ago, I bought a 1987 Mirage 29. It has a 2011 Yanmar 18 hp diesel. even though I am new to the onboard diesel world, the motor runs powerfully and reliably. however, I have a concern. Frequently, when i start the engine, the boat rattles like crazy until I mess with the throttle and it begins to idle peacefully. ive looked carefully and dont see any obvious loose bolts. any ideas?
__________________

__________________
leefromcanada is offline   Reply With Quote
Old 21-09-2017, 06:18   #2
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 5,764
Re: Yanmar rattle

It's a two cylinder diesel on soft rubber mounts. It will move wildly at idle, especially cold.

Best advice is to start with a slightly advanced throttle and stay there until you're ready to use the engine.
__________________

__________________
Sailmonkey is offline   Reply With Quote
Old 21-09-2017, 06:33   #3
Registered User

Join Date: Aug 2016
Location: Long Island, NY
Boat: Cal 33-2
Posts: 47
Re: Yanmar rattle

How are you starting the engine? Most Yanmars do not have a glow plug and the recommendation is to start with the throttle advanced. Once it starts, you bring it down to a fast idle until it warms up a bit. I suspect the noise you are hearing is a cold engine shaking at low idle.
__________________
S/V First Tracks
1985 Cal 33-2
JimsCAL is offline   Reply With Quote
Old 21-09-2017, 07:13   #4
Registered User
 
krafthaus's Avatar

Join Date: Apr 2011
Location: Saskatoon, Canada & Eastern Caribbean
Boat: Lagoon 420
Posts: 409
Re: Yanmar rattle

Hi Lee,

You mention you've checked and there are no loose bolts, but might be worth carefully checking the rubber motor mounts as well. These can sometimes crack through.

If this is only a problem when the engine is cold, then it might just be that it runs rough til it warms up.

Good luck.
__________________
Wherever we want to go, we go. That's what a ship is you know - it's not just a keel and a hull and a deck and sails, that's what a ship needs. But what a ship is...really is, is freedom. ~Johnny Depp as Capt. Jack Sparrow
krafthaus is offline   Reply With Quote
Old 21-09-2017, 09:05   #5
Registered User
 
leefromcanada's Avatar

Join Date: Nov 2012
Location: Hamilton, Ontario, Canada
Boat: Luger Tradewinds 26
Posts: 37
Re: Yanmar rattle

I usually start the engine throttled slightly (but not in gear). sometimes it starts cleanly. other times rattles the entire boat. in those times, I need to throttle higher before the shaking stops, then I can throttle back to neutral.
__________________
leefromcanada is offline   Reply With Quote
Old 21-09-2017, 10:49   #6
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,024
Re: Yanmar rattle

Sounds like normal cold Diesel clatter to me.
It will get worse this Winter if that is what it is.
__________________
a64pilot is online now   Reply With Quote
Old 21-09-2017, 16:27   #7
Registered User

Join Date: Oct 2009
Location: australia
Posts: 467
Re: Yanmar rattle

Dr Google: Critical Speed Definition.
__________________

__________________
shakey doug is offline   Reply With Quote
Reply

Tags
yanmar

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rattle in Neutral kelsa1 Engines and Propulsion Systems 4 15-08-2011 17:08
Transmission Rattle - Volvo d255 / Hurth bryan and wendy Engines and Propulsion Systems 1 13-07-2010 07:35
Anti-Rattle Door Fasteners from Jamestown Distributors SvenG Product or Service Reviews & Evaluations 3 23-04-2010 19:44
Prop Shaft Rattle seanseamour Propellers & Drive Systems 7 02-08-2009 20:27
shake, rattle and roll jimbim Engines and Propulsion Systems 19 10-06-2005 02:19



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:09.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.