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 26-11-2022, 15:33   #1
Registered User

Join Date: Jul 2012
Location: New Zealand
Boat: Ganley Transition 41 (corten steel )
Posts: 101
Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Hi And Thanks
My current yacht has the Yanmar 4JH3-TE 75hp , And I have purchased a seperate 4JH2-HTE 75hp to pull apart and play with in my own time in the garage. I also intend to keep it as a source for spair parts.
I believe they are very simular yanmar motors , but im hoping someone knows something that can help ..
ski69sail is offline   Reply With Quote
Old 26-11-2022, 16:34   #2
Registered User

Join Date: Feb 2010
Location: Australia
Posts: 1,708
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Quote:
Originally Posted by ski69sail View Post
Hi And Thanks

My current yacht has the Yanmar 4JH3-TE 75hp , And I have purchased a seperate 4JH2-HTE 75hp to pull apart and play with in my own time in the garage. I also intend to keep it as a source for spair parts.

I believe they are very simular yanmar motors , but im hoping someone knows something that can help ..


Here’s the chronology of the JH series and while I’m warily confident that some parts are interchangeable many other parts are not. Heat exchanger housings might be but low hp JH had a 2 pass tubestack and the higher Hp used a 3 pass stacks the cores and end caps were different. Injector pumps changed from inline to rotary, injector nozzles with different spray angles , injector pump drive gears with auto advance and there was a thread on this forum about water pump">raw water pump drive gear incompatibility recently. To use parts across different series would require a forensic search of both parts catalogues. [ATTACH]26799
Attached Thumbnails
Click image for larger version

Name:	IMG_2974.jpg
Views:	56
Size:	313.1 KB
ID:	267995  
skipperpete is online now   Reply With Quote
Old 26-11-2022, 21:37   #3
Registered User

Join Date: Jul 2012
Location: New Zealand
Boat: Ganley Transition 41 (corten steel )
Posts: 101
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Thanks Heaps.
So the other option was to recondition the 4JH2-HTE in the garage And keep it as a spair.
Im thinking that the worst that could happen is that atleast Ill actually learnt about the finer points of the motor. And possibly onsell it at no loss ???..at a later date.
Ray
ski69sail is offline   Reply With Quote
Old 26-11-2022, 23:31   #4
Registered User

Join Date: Feb 2010
Location: Australia
Posts: 1,708
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

The finer points of your two engines are almost identical, fuel system, overhead gear, turbo, heat exchanger...if you learn one.....you’ll understand the other. Both are good reliable models.
skipperpete is online now   Reply With Quote
Old 27-11-2022, 00:59   #5
Registered User

Join Date: Jul 2012
Location: New Zealand
Boat: Ganley Transition 41 (corten steel )
Posts: 101
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Thanks Skipper Pete.
Your opinion gives me lots of encouragement..Playing around on my actual yacht motor is very stressful... So haveing another motor to break is sounding like an OK idea. There is also a gearbox...

.
ski69sail is offline   Reply With Quote
Old 27-11-2022, 02:08   #6
Registered User

Join Date: Feb 2010
Location: Australia
Posts: 1,708
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Quote:
Originally Posted by ski69sail View Post
Thanks Skipper Pete.
Your opinion gives me lots of encouragement..Playing around on my actual yacht motor is very stressful... So haveing another motor to break is sounding like an OK idea. There is also a gearbox...

.


Money well spent, you won’t regret it. Please try and post your stories about the “training engine” so we can all benefit.
skipperpete is online now   Reply With Quote
Old 27-11-2022, 13:57   #7
Registered User

Join Date: Jul 2012
Location: New Zealand
Boat: Ganley Transition 41 (corten steel )
Posts: 101
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Hi Skipper Pete
My wife thinks its also a wonderful idea ... except for the cost..Sorry yet another and another and another cost...

I dont intend to sell this vessel ... so it feels like a cheap up front cost when divided by time ,knowledge and spair parts over another 20 or 30 years...God Willing....
ski69sail is offline   Reply With Quote
Old 27-11-2022, 17:41   #8
Registered User
 
Ericson38's Avatar

Join Date: Aug 2012
Location: Central California
Boat: Taswell 49 Cutter
Posts: 455
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Quote:
Originally Posted by ski69sail View Post
Hi Skipper Pete
My wife thinks its also a wonderful idea ... except for the cost..Sorry yet another and another and another cost...

I dont intend to sell this vessel ... so it feels like a cheap up front cost when divided by time ,knowledge and spair parts over another 20 or 30 years...God Willing....
I have a 4JH2-HTE. The series is all 1.8 liter.

The original 4JH series is 1.644 liter, (78 mm bore).

The 4JH3 series are 1.99 (2) liter.

The bore of the 4 JH3s is 84 mm, while on the 4JH2s it is 82 mm. The 4 JH4s are 2 liter also, but 4 valve heads with the bridge actuator.
Ericson38 is offline   Reply With Quote
Old 27-11-2022, 17:58   #9
Registered User

Join Date: Jul 2012
Location: New Zealand
Boat: Ganley Transition 41 (corten steel )
Posts: 101
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Hi Ericson 38

Thanks for your interest...Are there any other differances that would be worth menchining............ thanks heaps Ray
ski69sail is offline   Reply With Quote
Old 28-11-2022, 15:24   #10
Registered User
 
Ericson38's Avatar

Join Date: Aug 2012
Location: Central California
Boat: Taswell 49 Cutter
Posts: 455
Re: Yanmar 4JH3-TE 75hp AND 4JH2-HTE 75hp the differance between these two engines

Quote:
Originally Posted by ski69sail View Post
Hi Ericson 38

Thanks for your interest...Are there any other differances that would be worth menchining............ thanks heaps Ray
I'm sure there are more, but the biggest that stood out to me when downloading the parts and repair manuals was the bore-stroke values.
Ericson38 is offline   Reply With Quote
Reply

Tags
engine, 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
Turbo Removal on Yanmar 4JH2-HTE RoyL Engines and Propulsion Systems 10 03-07-2021 19:03
Yanmar 4jh2 HTE exhaust elbow amarf Engines and Propulsion Systems 1 18-03-2016 16:58
Yanmar 4jh2-hte questions dm567 Engines and Propulsion Systems 4 09-05-2013 15:13
Yanmar 4JH2-HTE Starter YACHT TARENTELA Engines and Propulsion Systems 4 28-09-2011 09:37
Yanmar 4JH2-HTE sirena gorda Engines and Propulsion Systems 1 27-05-2011 11:10

Advertise Here


All times are GMT -7. The time now is 23:11.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.