Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 26-10-2017, 08:48   #1
Registered User

Join Date: Feb 2014
Posts: 195
Yanmar 2GM20F

I am currently in a refitting of a '72 Pearson 33 and the the did sink 5/6 years ago BUT engine was torn down a flushed/repainted. I understand it was running but doubt it ran in 5 years. I hit the decompression levers and it freely turns.

I am looking for advice in advance of taking this next project. What is the general cost to rebuild this engine? I know if it needs bearings, rings etc it could be even more expensive. How about rebuild kits?? Any advice would be great!

Thanks!!
glcalahan is offline   Reply With Quote
Old 26-10-2017, 09:02   #2
Moderator Emeritus
 
sailorchic34's Avatar

Cruisers Forum Supporter

Join Date: Feb 2011
Location: SF Bay Area
Boat: Islander 34
Posts: 5,486
Re: Yanmar 2GM20F

If you provide the labor, rings, bearings and major gaskets, etc will run $500 ish for parts. Add $140 per injector and extra for engine mounts ($150 ea) Alternator, pumps starter etc. I rebuild my 3gm30F with machining for $1200, including $300 for two new engine mounts and $300 for sleeving one hole and honing the other two. That was in 2013.

Oversize pistons are available and run $150 ish ea.

However, I would bleed the engine. crank it for 20 second with the decompression levers pulled (close the raw water intake first) to distribute oil to te bearings and then see if it starts.

If it starts easy when cold it's most likely ok.

when I tore my yanmar down with 1100 hours on the clock there was zero wear on rings and bearings. That is they all mic'ed within new tolorance. Alas I had a 1994 engine and the 94 year engine had a batch of pistons with weak piston lands.

With over 600 hours on the rebuild, my engine is still going strong.
sailorchic34 is offline   Reply With Quote
Old 26-10-2017, 09:16   #3
Registered User

Join Date: Feb 2014
Posts: 195
Re: Yanmar 2GM20F

Thank you for all this info sailorchic!!!
glcalahan is offline   Reply With Quote
Old 26-10-2017, 13:11   #4
Registered User

Join Date: Aug 2015
Location: Sozopol
Boat: Riva 48
Posts: 1,382
Re: Yanmar 2GM20F

I recently replaced my 2GMF (that span a bearing) with a 2GM20f. Pretty much all the parts from the old 2GMF are available. If you decide to rebuild just let me know if you need any parts (fuel pump, heat exchanger, injectors, etc.).

Pizzazz
Pizzazz is offline   Reply With Quote
Old 26-10-2017, 20:12   #5
Registered User

Join Date: Feb 2014
Location: Niagara Falls
Boat: Westsail 32
Posts: 629
Re: Yanmar 2GM20F

Take out the injectors and spray fogging oil for 5 seconds into each port. Then turn the engine over by hand for a few revolutions, to coat the cylinder walls with oil. Put the injectors back in and try to start the engine.
Seymore is offline   Reply With Quote
Reply

Tags
2gm, 2gm20, yanmar

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
Yanmar 2GM20F mixing elbow replacement dirkfr Engines and Propulsion Systems 19 28-02-2022 05:20
Yanmar 2GM20F tach Glenn Whaley Engines and Propulsion Systems 4 12-07-2008 03:47
Yanmar 2GM20F dip stick psteele235 Engines and Propulsion Systems 5 23-06-2008 16:19
Yanmar 2GM20F psteele235 Propellers & Drive Systems 4 22-06-2008 05:44
Water Temp Gauge for Yanmar 2GM20F Squeaks Engines and Propulsion Systems 5 12-07-2007 17:34

Advertise Here


All times are GMT -7. The time now is 18:04.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.