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W42 Fuel Tanks and Engine

  • February 03, 2013 12:41 PM
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    Message # 1197338
    Anonymous member
    Hi Bud, 

    It looks like I will be replacing the water and fuel tanks. Will consider isolation.. The boat will be on the hard until mid to late summer so I may use that time to go ahead and replace them.  I read the section in the maintenance manual and will look at taking center tanks out, cutting bulkheads and pulling wing tanks to center....  The center water tank is contaminated with diesel fuel. The bilge area forward of the tank just forward of the step down was relatively clean when I looked at it before shipping, but without pulling up an elevated deck sole sitting in the bilge to keep equipment off the bilge. Upon inspecting the same bilge area after shipment, it was soaked quite high and all equipment with diesel ,etc.. The stepped up bilge area  as seen through the aft cabin sink area was full of water/ fuel and the lower deep bilge was filled with same. Both tanks are empty now. One possible thought both center tanks leaked, diesel / water level got high enough to let the level contaminate the water tank and spill into both bilges... The bilges were steam cleaned and once again the upper and lower bilges have water and diesel fuel in them...

    As for engines, want to get info for future replacement . The Pekins 4-236 has 9000 + hours on it. Looked at Yanmar 4JH4-HTE1 100hp and Beta 75, Beta 105 engines. Trying to see what engines other W42 /43 owners have re powered with. Is there a down side to going with a higher HP engine, 100hp, rather than the 80hp ..? Turbo vs normally aspirated..? Indirect vs direct injection...?  Maintenance and part availability ..?

    I have read of some folks having over heating issues the turbo engines..? Reliability, of turbo in sailboat marine environment...? 

    Extra HP for reserve for possible long runs in heavy seas, against currents,etc. 

    I heard that the turbo engine should be run at optimum RPM to keep form getting  carbon build up, etc.. Somewhere I read that someone said that Yanmar warranty is void if not run at optimum rpm. RPM to get or at hull speed may be below optimum RPM for  turbo engine.....

    Also on a later topic, someone mentioned having a CD of work or etc of a W42 any other information would be great..

    Thanks,

    George



  • March 02, 2013 6:46 AM
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    Reply # 1231417 on 1197338
    Deleted user

    Hello George -

    I have yet to cross the fuel /water tank 'rubicon' however I have had completed  the repower odyssey with a BETA 75 spinning a Gori 20 folding prop.

    The BETA 75 has ample power and massive low speed torque for close quarters maneuvering.

    I like the Gori variable pitch folding prop. With max pitch can cruise at 7.3 knots under most conditions while sipping fuel at about 1700 rpm and still achive max 2600 rpm with the reduced pitch mode for powering thru  rougher conditions. Might recommend considering the MAX Prop tunable pitch prop as 1700 rpm continuous is a little low.

    The main challenge when switching engine type away from the perkins will be creating new places on the hull to mount/bolt down. I would recommend contracting with Bud, if possible, as he has the required expertise.

    Good with your projects !

    Tom

     
  • March 02, 2013 7:29 AM
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    Reply # 1231452 on 1197338
    Deleted user
    George,

    I do not know where you are but if you want you can come by the yard as I hauled yesterday and you could get a close look at new engine tank install.  The cabin is not built out yet so you can see the steps in great detail as well as pro's and cons to  all possible solutions.

    Additional bonus.  "Music" another W43 is hauled in Santa Cruz for another week too so you could get a close look at 2 bigger westsails on the hard and see what solutions they have rovided for their individual vessels.


    I'm at Gravelle's Moss Landing which is 20 mintues from Music.........
  • March 03, 2013 10:16 PM
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    Reply # 1232858 on 1197338
    Anonymous member
    Tom,

    Thanks for the info. I gather that Odyssey is a W43 and is on the hard and Music is only a short distance away..? How That would be great to see your boat; however, I just left for Ketchikan, AK for a week or so. If you she is still on the hard when I return perhaps, we can come and see her. Would you have any photos that you are willing to share of the tank and engine install ..? What made you go with the Beta Engine...? Did you use Aluminum for fuel tanks and SS for the water tanks..?  Etch, paint, etc the aluminum tanks..?  I am just getting done building a new bulkhead and re installing it and a new I beam for the mast compression post..

    Thank, George
  • March 04, 2013 10:21 AM
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    Reply # 1233296 on 1197338
    Deleted user

    Hello George -

    Ed posted the reply regarding 'Music' and the W43.

    I posted the reply regarding the BETA engine.

    The BETA (Kubota) diesel developes near max  torque early in the rpm curve (about 1650 rpm) and operates at a lower speed overall (max rpm/hp is 2600 rpm). I fitted mine with a variable pitch prop which allows me to cruise over 7 knots with very good fuel efficiency under most conditions at around 1750 rpm.  I calculated that to achieve hull speed (W42)  the engine would have to be about 60 HP. Didn't want to be running high rpm's in a 60 HP BETA to cruise at hull speed all day so I went with the next engine size up (BETA 75).  Very pleased with the BETA 75. Night and day difference compared with the previous Perkins 4-108 which developed rated max hp of 38 at 4000 rpm !

    The BETA (Kubota) is a modern industrial diesel engine and the power/torque/fuel ratings have proven to be very realistic.

    High speed diesels are lighter in weight but what I prefer is a slower rpm machine that I can run with relatively low noise for days on end, if required, with max fuel effiency. Lower rpm, to me, alsomeans long engine life.

    My 2 Cts.

     
  • March 04, 2013 8:22 PM
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    Reply # 1233839 on 1197338
    Deleted user
    I agree on the bigger motor.  My powerplant is a 58hp yanmar which IMHO could be bigger.  If and when I replace I will upsize the hp until then I will endure higher rpm's than I'd like when fighting weather, current, and waves.
  • March 04, 2013 8:48 PM
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    Reply # 1233851 on 1197338
    Deleted user

    When we purchased Harmony, the previous owner had removed the old Perkins 4-108 and did not replace it with anything.  After much research, we selected a Yanmar 4JH4-HTE, which offers 110 hp.  Yes, it is turbocharged.  The vendor, Mack Boring, was extremely helpful, which is more than I can say for other dealers.

    The Yanmar is in the boat at the moment, but the boatyard had not started the final install.  The biggest part of the install is constructing appropriate mounting areas.  The existing engine pan was just right for the Perkins.  However, the additional structure should not be difficult.

    I am very interested in experiencing how the Yanmar works.  We chose the 110 HP Yanmar to help deal with adverse currents and a bit of weather.  The next size down just didn't seem to have the muscle to move the boat enough.

    I have joked that with 110 HP, we should be able to water ski behind the Westsail 42 and if we can get that turbo to spin just right maybe even we'll hydroplane on the keel! 

    Doug
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