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Hylas Discussion / 4JH-TE whole engine or spare parts?
« Last post by YachtShah on April 25, 2022, 03:14:20 AM »
I am here in Asia and have decided that labour is cheap enough to do another rebuild on my Yanmar 4JH-TE.  I am sure that others in other countries have decided that it is not worth it due to the higher local labour rate.

So, I am on the hunt for a complete Yanmar 4JH-TE 55hp, circa 1989?  Or any parts that you might have bought and now have no use for?

I need heat exhanger, turbo and exhaust mixer fairly urgently, and anything else would be a bonus.

I will collect stuff together and send out here by sea freight, surprisingly cheap freight albeit rather slow.

Either post here, or send a direct message, thanks a lot !!!


H44 #65 1989
Formerly SHAH, soon to be painted and renamed MINX.
Hylas Discussion / Re: Is transom cored on H 44?
« Last post by YachtShah on April 25, 2022, 03:08:50 AM »
Yes, I drilled through to add custom davits and no evidence that I can recall of anything but good solid fibreglass. 
Hylas Discussion / Re: Is transom cored on H 44?
« Last post by joel on April 22, 2022, 02:31:45 PM »
I thought only the deck was cored?
Hylas Discussion / Is transom cored on H 44?
« Last post by NordicSunII on April 21, 2022, 02:56:52 PM »
I'm installing hydronic heat.  In order to buy the correct exhaust thru hull fitting I need to know if the transom of the Hylas 44 Mark 1 is solid fiberglass or cored.  Does anyone know if the transom on a H44 is cored or solid fiberflass?
Experienced Hylas Yachts / Re: Hylas 49 #58 (2007) for sale by owner
« Last post by mjarzo on April 19, 2022, 06:14:11 PM »
UPDATE: We should arrive mid-Atlantic coast of USA around the end of May 2022 and have the boat ready for viewing a couple of weeks after that. Thanks. Michael Jarzabkowski
Hylas Discussion / Re: Cabin sole flexing issue
« Last post by Ganesha on April 17, 2022, 11:54:39 AM »
Good photos, thanks so much, I see you put a lot of effort into that, and I thank you. Unfortunately I don
Hylas Discussion / Re: Hylas 54 - air in fuel / Racors
« Last post by joel on April 15, 2022, 02:01:00 PM »
I'd run a fuel line from the tank directly to the Racors to bypass the valves and old hoses.  You may just need a cheap electric pump as Scott suggests.

Hylas Discussion / Re: Hylas 54 - air in fuel / Racors
« Last post by sjohnson on April 14, 2022, 09:18:11 PM »

We have H54 - #22.  We repowered in 2016 with the Yanmar 110hp common rail.  Did not have the problems you are experiencing, but with the larger engine, you have significantly more fuel flow then the original engine.  Makes some sense you are getting larger drops. 

On our engine, the lower levels on the fuel tanks were below the recommended lift on the new engine.  I think it specified no more then 2 feet and we had closer to 3 feet.  In discussion with Yanmar, we installed a small, low pressure booster pump on the fuel line between the fuel manifold and the engine intake.  Did a bunch of testing for yanmar and we were all happy with the results.  This may help your engine by keeping better pressure at the intake, but will probably not solve the fact you have more than expected drop across the filters and manifold or air in the lines.  The larger manifold valves may be an easier solution to reduce pressure drop.   Our experience with air is that it has to be getting in someplace, via loose connection, gasket, etc.  The higher vacuum will cause more air in the line but the root cause must be something allowing air in somewhere in the system.

Let me know if you are interested in any additional details on our booster pump.

Scott Johnson
SV Bacchus
H54 - 22
Hylas Discussion / Hylas 54 - air in fuel / Racors
« Last post by elecco on April 14, 2022, 01:41:01 PM »
Hello Hylas owners.  I've been having some issues with air in my fuel which my mechanic feels is caused by high vacuum pressure. I have a dual Racor filter setup like many 54's on the engine room door. Vacuum pressure has been running above 4 psi.  He thinks a few things are contributing.   Fuel tanks are low in the boat. Engine feed valves on fuel transfer manifold are small. 

If we select two fuel tanks to feed the engine, the vacuum drops down to an acceptable level.  We also selected "both" Racors instead of one with the selector valve, that dropped vacuum by 1 psi.  Also, believe the vacuum pressure is acceptable when the tank is above half full.

We are thinking of putting larger feed valves to the engine on the fuel transfer manifold.

Note, the boat was re-powered in 2015 with a new Yanmar 4LHA-HTP 160 HP engine.

Curious if anyone else has had a similar issue and if so, how you resolved.

S/V Voyager, H54-11
Hylas Discussion / Re: Conversion from AGM to LiFePo4 Batteries
« Last post by Aurora Borealis on April 13, 2022, 05:05:58 PM »
I have a complete Victron system on a non-boat (RV), and am happy to relate the following story.  Through a series of unfortunate events, including it being sequestered in the Yukon for the winter (!) without being plugged in, I finally was able to find a hauler and when I got it, its 160Ah 12.8V batteries were at 1.7V. Death to any traditional battery.

Yet with a smart charger (also Victron),  I am delighted to report they both without incident went past full charge, past absorb, and on into float at 13.5V. Yesterday I re-installed them and the entire system immediately went into nominal. I couldn't be happier and am in awe of today's technology.

I am not plugging Victron over others - just would like to share how well LiFePO4 batteries can endure ridiculous abuse.
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