Author Topic: Hylas 46 re-powering  (Read 419 times)

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Re: Hylas 46 re-powering
« Reply #6 on: August 10, 2023, 05:26:53 PM »
Our 49 was repowered by the prior owner.  He removed the steps, galley sink and countertop, and slid the engine forward on 2x4s with a come-a-long.

He also replaced the engine mounts, transmission and shaft seal.

Good luck with the repower!



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Re: Hylas 46 re-powering
« Reply #5 on: August 10, 2023, 03:42:37 PM »
Yes, Please keep us posted on your progress.  14,000 hours is really good.  We have about 6500 hours on our 4jh2-HTE and a mechanic said that was the most he has ever seen on a sailboat.  Our engine runs great but I'm starting to think about replacement. 

H49 #31
« Last Edit: August 10, 2023, 03:50:44 PM by Moonlight »


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Re: Hylas 46 re-powering
« Reply #4 on: July 21, 2023, 11:53:29 AM »

Can you keep us in the loop on the repower process and details?  I am probably looking at doing this some time in the near future and would benefit from your experience.  Our boats are probably similar with regard to engine access.  Curious on how the motor will be removed, what equipment is required, etc.

Pictures would be a great help.

Thank you,

Moon Taxi, 88 H44


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Re: Hylas 46 re-powering
« Reply #3 on: July 20, 2023, 11:37:02 PM »
Be careful on a repower. We went from a 4JH3-TE to a 4JH4-TE. Mechanic said it would bolt right in, not the case. Turned into a real nightmare. Still dealing with issues because of his poor work. Finally seeing the end of problems after much time and expense.
« Last Edit: July 23, 2023, 11:39:48 AM by svHope »


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Re: Hylas 46 re-powering
« Reply #2 on: July 20, 2023, 07:05:08 AM »
Don't fear the common rail.  The modern diesels are great, quieter, more efficient.  I put a new Yanmar 4JH110 in my 54 and it's been wonderful.  Choose the engine with the same block and it will bolt right in without all the modifications another brand will require.
S/V Renegade  H54-19


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Hylas 46 re-powering
« Reply #1 on: July 19, 2023, 07:19:39 AM »
Has anyone re-powered a Hylas 46 recently.  Currently have 14,000 hr 4JH2-TE that will soon require replacement.  Wanted to install a 4JH4-TE because it's mechanically controlled, but no longer available.  Any suggestions?


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