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Old 14-01-2015, 19:02   #1
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4JHE to 4JH3E w/ downangle gear

Is a Yanmar 4JH3E with a Kanzaki KM3A1 (7 degree down angle) gear an acceptable replacement for a 4JHE with a horizontal (non down angle)drive? From a previous thread, I know the engines are very close... But, what kind of problems will the down angle gear create during a repowering project. Thanks for your time!
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Old 20-02-2015, 06:34   #2
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Re: 4JHE to 4JH3E w/ downangle gear

You might experience benefits. The engine can be moved back on the shaft.
The engine will lay on a less, or no incline.
Dip stick readings will be more accurate.


But engine mounts may require greater modifications.
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Old 20-02-2015, 07:40   #3
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Re: 4JHE to 4JH3E w/ downangle gear

Greetings and welcome aboard the CF, Divina & Sony.
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Old 20-02-2015, 13:30   #4
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Re: 4JHE to 4JH3E w/ downangle gear

Quote:
Originally Posted by DivinaVitae View Post
Is a Yanmar 4JH3E with a Kanzaki KM3A1 (7 degree down angle) gear an acceptable replacement for a 4JHE with a horizontal (non down angle)drive? From a previous thread, I know the engines are very close... But, what kind of problems will the down angle gear create during a repowering project. Thanks for your time!
I suggest that you stay with the same gearbox type (no down angle) as this seemingly small change will make a repower a real pain in the a***.
The change needed to the engine beds to accommodate the down angle will cause you extra work and expense and headaches.
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Old 04-03-2015, 17:08   #5
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Re: 4JHE to 4JH3E w/ downangle gear

Thanks to everyone for the information and replies. I believe I will simplify the repower effort and stay with a parallel marine gear. Thanks again!
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