Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 23-12-2017, 13:11   #1
Registered User

Join Date: Sep 2010
Location: Channel Islands Harbor Marina, Oxnard, CA, USA
Boat: Parlay 400, 40' catamaran sloop rigged "Into The Mystic"
Posts: 4
Starting 3YM30's after a 3 year rest

I have two Yanmar 3YM30's on my catamaran "Into The Mystic", unfortunately due to family problems, I have not started them in over 3 years. Does anybody have advice on procedures to prep and start these engines? Thanks, Glenn
__________________

gbraddon is offline   Reply With Quote
Old 23-12-2017, 17:30   #2
Registered User

Join Date: Feb 2014
Location: Niagara Falls
Boat: Westsail 32
Posts: 424
Re: Starting 3YM30's after a 3 year rest

Take out each injector and spray fogging oil for 5 seconds into each cylinder. Turn the engine over manually for a few revolutions. Replace the injectors and start the engine.

These instructions are usually on the cans of fogging oil.
__________________

Seymore is offline   Reply With Quote
Old 23-12-2017, 18:08   #3
Registered User

Join Date: Nov 2013
Location: Nice, France
Boat: Hunter Marine 38
Posts: 382
Re: Starting 3YM30's after a 3 year rest

change oil before your first start attempt and immediately after it has started and the oil is hot.
sailormed is offline   Reply With Quote
Old 23-12-2017, 23:14   #4
Registered User
 
Island Time O25's Avatar

Join Date: Sep 2014
Posts: 2,126
Re: Starting 3YM30's after a 3 year rest

If you have access covers to your diesel tank(s) check the condition of the diesel. If it was put away properly, i.e. topped up and with stabilizers, antibacterials, etc. added, it should be fine. If not, either empty the tanks by siphon or run diesel through some sort of filtration scheme before letting it reach the engine.

If the boat was put away with half empty tanks there would be some significant condensation water and/or bacterial muck in them.
Island Time O25 is online now   Reply With Quote
Old 24-12-2017, 00:53   #5
Registered User

Join Date: Feb 2013
Location: Chaguaramas, Trinidad
Boat: Allegro 33
Posts: 272
Re: Starting 3YM30's after a 3 year rest

I would also let the starter crank the engine with the stop handle engaged preventing the engine to start before you get oil pressure.

This will ensue that you get an oil film into the bearings before they get the load of the combustion. After a 3 year standstill there is probably no oil there anymore. I always do this when changing oil.
hasse_A is offline   Reply With Quote
Old 24-12-2017, 05:40   #6
Registered User
 
flyingfin's Avatar

Join Date: Oct 2016
Location: Cape Haze,FL
Boat: Carver,Cobia,Nacra
Posts: 260
Re: Starting 3YM30's after a 3 year rest

[QUOTE=Seymore;2542012]Take out each injector and spray fogging oil for 5 seconds into each cylinder. Turn the engine over manually for a few revolutions. Replace the injectors and start the engine.
/QUOTE]

Important - after shooting each cylinder with fogging oil, or Marvel Mystery Oil, lightly thread in the injector and let it sit OVERNIGHT. Then, drain your fuel tanks and replace with new diesel. The next day, remove the injectors, spray some more fogging oil and let sit for 15 minutes, do not replace injectors.
Then lightly bump the engine with starter. Repeat as many times as your patience allows. Goal is to ensure that you dont have a frozen piston ring that will immediately scar the cylinder wall should you attempt to fire it up and spin it up to 1,000 rpm!
flyingfin is offline   Reply With Quote
Old 24-12-2017, 08:59   #7
Registered User

Join Date: Oct 2015
Location: Summerstown Ontario Canada
Posts: 270
Re: Starting 3YM30's after a 3 year rest

Quote:
Originally Posted by gbraddon View Post
I have two Yanmar 3YM30's on my catamaran "Into The Mystic", unfortunately due to family problems, I have not started them in over 3 years. Does anybody have advice on procedures to prep and start these engines? Thanks, Glenn
When shutting down a diesel engine the diesel fuel usually lubricates the cylinder. To start an engine that has been sitting for a while I would see if the engine turns over by hand first. Then introduce the starter momentarily. If the engine turns over... keep on cranking for 15 seconds or so. It should start. If not, crack an injector line and see if fuel is present or coming out. If fuel is not present. check for fuel at the fuel pump. If fuel is present at the fuel injector then try cranking over again. I had a Lister Diesel two cylinder on an industrial 4 inch gusher pump parked out behind my garage in the rain and snow and whatever. It was there for 12 years. This summer, to help flood victim we checked to see if the pump would turn over... it did! We installed a battery and turned it over to check for fuel... fuel was present! We turned it over for maybe 45 seconds and it started... to our SURPRISE! we let it warm up, added some more fuel and we went pumping.
seabreez is offline   Reply With Quote
Old 24-12-2017, 10:20   #8
Marine Service Provider

Join Date: Dec 2009
Location: St Augustine, FL
Boat: Woods Vardo 34 Cat
Posts: 3,030
Re: Starting 3YM30's after a 3 year rest

Have the water pumps been sitting with seawater in them this whole time. Would be wise to replace the impellers.

There is a manual stop on the injector pump. Hold that in while someone cranks the engine for 2 say 15 second bursts.

Forget the pulling injector business. If this was a 40 y/o crate engine maybe, but I bet 1/3 the sailboats out there have this kind of lapse at some point.

Also advisable to change fuel and oil and filters also
__________________
@mojomarine1
Boatguy30 is offline   Reply With Quote
Old 24-12-2017, 15:01   #9
Registered User

Join Date: Sep 2007
Location: Queensland, Australia
Boat: None at present--between vessels. Ex Piver Loadstar 12.5 metres
Posts: 568
Re: Starting 3YM30's after a 3 year rest

Cranking the engine without a start could get water into the exhaust manifold from the heat exchanger to the mixing elbow. If you are going to do thuis sopinning the engine with stop button depressed--disconnect the hose from the mixing elbow.
Mike Banks is offline   Reply With Quote
Old 27-12-2017, 13:08   #10
Registered User

Join Date: Sep 2010
Location: Channel Islands Harbor Marina, Oxnard, CA, USA
Boat: Parlay 400, 40' catamaran sloop rigged "Into The Mystic"
Posts: 4
Re: Starting 3YM30's after a 3 year rest

Thanks to all for your advice on starting my Yanmar's. That's why I love this forum. GB
__________________

gbraddon is offline   Reply With Quote
Reply

Tags
3ym30

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Another hard starting 3GM-30f hard starting issue phantomracer Engines and Propulsion Systems 29 17-05-2017 03:19
Rest of the Year? Vivid Boat Ownership & Making a Living 16 02-09-2014 13:21
Ruining it For The Rest of Us? ssullivan General Sailing Forum 108 16-02-2008 19:17
St. Petersburg Marina - The Rest of the Story markpj23 Off Topic Forum 0 16-02-2008 19:04
The Start of the Rest of my Life billyehh Meets & Greets 3 28-05-2007 12:24



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:29.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.