Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-01-2015, 08:53   #1
Registered User

Join Date: Oct 2013
Location: Kingston, Ontario, Canada
Boat: Columbia, 8.3 and 8.7 (1977)
Posts: 153
Help to Identify a Yanmar Engine

I'm looking to purchase a 3GM Yanmar engine but the rest of the model number is not on the plate. There is a rating though that says 20 HP @ 3400 rpm. From that I would assume it is a 3GM20 but isn't the HP usually less than the model rating ie. a 2QM15 is only 12 HP I think. Only other numbers is 120 on the same plate as the 3GM and engine number is 00383. Could someone let me know what they think the model number might be on this engine. Thanks
__________________

__________________
weephee is offline   Reply With Quote
Old 24-01-2015, 12:18   #2
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,003
Send a message via Yahoo to roverhi
Re: Help to Identify a Yanmar Engine

Believe the 3GM is 27hp, definitely not 20hp. Could the engine be a 3QM, predecessor to the 3GM and not as desirable an engine.
__________________

__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Old 24-01-2015, 12:42   #3
Senior Cruiser
 
Roy M's Avatar

Cruisers Forum Supporter

Join Date: Feb 2007
Location: Southwestern Yacht Club, San Diego, CA
Boat: Searunner 40 trimaran, WILDERNESS
Posts: 3,041
Images: 4
Re: Help to Identify a Yanmar Engine

Forward end of my 3GM30F is a plate with this identifier.
Attached Thumbnails
Click image for larger version

Name:	DSC05462.jpg
Views:	195
Size:	422.6 KB
ID:	95999   Click image for larger version

Name:	DSC05399.jpg
Views:	165
Size:	431.9 KB
ID:	96000  

__________________
Roy M is offline   Reply With Quote
Old 24-01-2015, 12:47   #4
Registered User
 
LeaseOnLife's Avatar

Join Date: Apr 2008
Location: out cruising again
Boat: Sailboat
Posts: 1,046
Re: Help to Identify a Yanmar Engine

Some info on the different 3GMxx here:
Yanmar Marine Engine Identification
__________________
LeaseOnLife is offline   Reply With Quote
Old 24-01-2015, 12:50   #5
Senior Cruiser
 
Roy M's Avatar

Cruisers Forum Supporter

Join Date: Feb 2007
Location: Southwestern Yacht Club, San Diego, CA
Boat: Searunner 40 trimaran, WILDERNESS
Posts: 3,041
Images: 4
Re: Help to Identify a Yanmar Engine

1 kilowatt =
1.34102209 horsepower

17.1 kW is 23 hp
20.1 = 27 hp

You were misreading kW for horsepower on the plate
__________________
Roy M is offline   Reply With Quote
Old 24-01-2015, 14:37   #6
Registered User

Join Date: Jun 2012
Location: Elmvale, Ontario
Boat: Ontario32
Posts: 160
Re: Help to Identify a Yanmar Engine

My previous vessel was a Tanzer 8.5 built in 1981 and came with a Yanmar 3GM 20 serial number 00392 so, very close to yours in production. It produces 20hp @3400 rpm continious rating and 22hp @3600 for one hour duration, it was and is a bullet proof engine.
__________________
Crew of Turning is offline   Reply With Quote
Old 24-01-2015, 17:12   #7
Moderator
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 4,812
Re: Help to Identify a Yanmar Engine

Crew of Turning has nailed it. The OP has an early model 3gm with slightly lower hp ratings and sleeves for cylinder walls. Yanmar did a cost saving redesign which got rid of the sleeves and a few other minor differences and called it the 3gm30(f).

The original 3gm's probably list the correct hp for the engine. They are built a bit better then the 3gm30's. Many parts such as pistons are not cross compatible though.
__________________
sailorchic34 is offline   Reply With Quote
Old 25-01-2015, 11:49   #8
Registered User

Join Date: Sep 2014
Location: Tampa
Boat: Hunter 33.5
Posts: 128
Re: Help to Identify a Yanmar Engine

Roverhi, contact "Complete Yacht Service" Ft.Lauderdale, Fl, ask for Mark the owner, (USMC) , he is the Yanmar dealer there. Tell him Pat N formerly from there now in Tampa told U to call. Take a photo of the engine, etc and send it to him, he will know.
Good luck.
__________________
tdh1849 is offline   Reply With Quote
Old 25-01-2015, 13:18   #9
Registered User

Join Date: Oct 2013
Location: Kingston, Ontario, Canada
Boat: Columbia, 8.3 and 8.7 (1977)
Posts: 153
Re: Help to Identify a Yanmar Engine

Quote:
Originally Posted by sailorchic34 View Post
Crew of Turning has nailed it. The OP has an early model 3gm with slightly lower hp ratings and sleeves for cylinder walls. Yanmar did a cost saving redesign which got rid of the sleeves and a few other minor differences and called it the 3gm30(f).

The original 3gm's probably list the correct hp for the engine. They are built a bit better then the 3gm30's. Many parts such as pistons are not cross compatible though.
So can I assume then, that the physical dimensions of the 3GM30 would be the same as the 3GM that I am looking to buy. I'm am planning on replacing my Vovo MD7A with the 3GM. Thanks
__________________
weephee is offline   Reply With Quote
Old 25-01-2015, 13:22   #10
Moderator
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 4,812
Re: Help to Identify a Yanmar Engine

Quote:
Originally Posted by weephee View Post
So can I assume then, that the physical dimensions of the 3GM30 would be the same as the 3GM that I am looking to buy. I'm am planning on replacing my Vovo MD7A with the 3GM. Thanks
Yes the exterior dimension are the same. The older 3GM matches 3gm30 size. It's the same block casting. Yanmar got rid of the sleeved in the later 3GM30 engines and the piston and rings are slightly different by roughly 0.2 inch or so.
__________________
sailorchic34 is offline   Reply With Quote
Old 25-01-2015, 13:41   #11
Registered User

Join Date: Oct 2013
Location: Kingston, Ontario, Canada
Boat: Columbia, 8.3 and 8.7 (1977)
Posts: 153
Re: Help to Identify a Yanmar Engine

Thanks everyone for all your help.
__________________

__________________
weephee is offline   Reply With Quote
Reply

Tags
engine, 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
Yanmar 4JH3E Need to Identify A Part casual Engines and Propulsion Systems 9 28-03-2016 10:34
Help Identify this engine paulmccaige Engines and Propulsion Systems 9 12-11-2012 06:49
Please Help Identify this Engine bbbbbguy Engines and Propulsion Systems 0 10-11-2011 19:06
Identify a Yanmar nine lufts Engines and Propulsion Systems 16 05-08-2011 07:29
Please Identify this Engine . . . jdeatsch Engines and Propulsion Systems 6 01-01-2011 07:58



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:38.


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.