W42 engine hatch seal

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  • February 09, 2016 8:35 AM
    Message # 3808964

    Hi All,

    I am in the process of setting a new beta 75 in our boat and was wondering what has worked well or the best for resealing the engine hatch after removal. I will clean the mating areas well and was thinking of making a gasket out of closed cell foam and use possibly 4200 around the bolts, etc. I preferably do not want to seal it entirely with 4200 or the like b/c it would be impossible to separate the hatch if needed. Could also put a bead of 4200 on each side of the gasket. Any and all suggestions, thoughts are greatly appreciated

    Thanks in advance.


    W42 Cadence

  • February 13, 2016 8:33 AM
    Reply # 3820179 on 3808964

    A foam seal is probably the best way to do the job.  Use spots of caulking along the foam seal to prevent it from shifting when you bolt down the hatch.

  • February 17, 2016 1:06 PM
    Reply # 3827676 on 3808964
    Deleted user

    I too have installed a BETA 75 in our W42 (Second Line), about four years ago.

    You will be very happy with your engine choice!  Will be curious to know what prop you decide to use.

    The cockpit sole plate (engine hatch) was successfully sealed by first bolting in place and then caulk the gap from the underside Sika Flex. We used through bolts spaced at 6 inch intervals with fender washers and caulked those as well. No leaks so far and if we do ever need to remove the plate it should be much easier to part the Sika Flex than 4200!

    You may want to verify that the cockpit drains/bedding are in good shape as you cannot remove two of three of these w/o having to lift the sole plate.

    Best, Tom G New Orleans

  • February 18, 2016 3:01 PM
    Reply # 3830717 on 3808964

    When we installed a new engine on our WS42 Harmony, we experienced some minor leaks from the cockpit.  Thankfully, gasketed area was leak free.  The culprits were (1) the bolts securing the cockpit plate; and (2) the deck prism.

    The deck prism leaking was a given because of the age of the bedding, which I think was original.  Not a real problem and was fixed easily.  Moreover, the original bedding held up for almost 40 years until the yard apes flexed the cockpit plate on removal and re-installation.

    I guess they may have been more careful if it was their boat, HUH?  Actually, our yard is quite good, but poop does happen occasionally!

    The leaking bolts were a frustration, since the boat yard SHOULD have bedded them properly.  However, it was an easy fix that took about 30 minutes.  A main challenge was ensuring the carriage bolts wouldn't just spin when loosened and tightened.

    After 2 years no leaks!

  • February 20, 2016 10:18 AM
    Reply # 3834130 on 3808964

    Bud, Tom, Doug,

    Thanks for the your thoughts, experience with the hatch. I think that I will use a combination of a closed cell foam gasket and Sika Flex… Tom good point about the 2 cockpit drains !! I was so busy with the engine room, doing some insulation, re wire, etc. that I did not think of the drains. 

    Tom and Doug what size prop shafts and props do you have? I believe the one on Cadence is 1 1/8. 

    For now, I am probably staying with the original prop, but was thinking of a Max prop and perhaps changing to an 1 1/4 prop shaft since that seems to be more of a standard size.

    Also, a little change of subject, but part of this system overhaul. Are both of you using your original pedestals ? Mine is a Yacht Specialities and parts are hard to come by, like brake parts. I did have a new plate machined that goes on the underside of the hatch. Are you using the old or have perhaps Edson pedestals ?

    I need to look more closely at the brake parts in the Yacht Specialities and see if I can make necessary parts… Or if it is with it in the long run.



  • February 22, 2016 7:41 AM
    Reply # 3836640 on 3808964
    Deleted user

    Hello George -

    1.25" shaft turning a Gori folding prop.

    Are you getting a new transmission with the BETA 75?

    Also, our bolt pattern is more like 8" spacing rather than 6".

    Max prop is probably something I would consider over the Gori as pitch will be adjustable.

    Each design has its merits/draw backs.


  • February 22, 2016 8:15 AM
    Reply # 3836730 on 3808964
    Deleted user

    Also...We have the original Yacht Specialties pedestal...

    While you have things apart you should inspect all the chain links hidden fromm view inside the pedestal for cracks/damage.

    Our chain drive had several broken side links on the chain we discovered after the chain had parted under load when backing up.


  • February 23, 2016 3:56 PM
    Reply # 3840083 on 3808964

    George, I will have to check on the size of our new shaft and the dimensions of the potentially original 3 blade prop.  We had wanted to use a max-prop, but the manufacturer advised against it because the shaft was thought too small.  That saved me a ton of boat bucks!

    To think shaving a 3/4 of a knot off a WS42!!!  We are fairly fast under sail as it is for a big hull, so the $5000+ for a folding prop would have been a waste!!!  What was I thinking!!!?  :-)

    In our restoration, we kept our Yacht Specialities pedestal.  Yes the YS is a tad bit different than the common Edson.  However, my yard and I were able to morph parts to allow us to retain the pedestal.  One of the things I did was to use 2 Edson starboard plates to size up to the Navpod pedestal guard at 8 inches.

    One challenge that I wasn't able to overcome was the direction of the throttle throw. The Edson ring that I used was reversed to accommodate the Yanmar engine cables.  In this bargain, our throttle lever is reversed:  right side and pushing forward to reduce rams.

    It took some practice to "unlearn" the old direction, but it works quite nicely now.  The use of the starboard plates allowed me to reuse the YS pedestal and save a few boat bucks.

  • February 23, 2016 6:43 PM
    Reply # 3840276 on 3808964
    Deleted user

    Not sure if this is applicable to anyone else's situation but I have 2 props: one folding and one fixed both 3 blades.

    The folding is much better for more than just reduced drag.  Also reduced vibration while sailing.  The fixed prop turns and causes some vibration whereas the folding prop is much quieter.  Yes it turns but not much.  Something to think about in addition to the 1/2 knot.  That's about all the extra speed over ground I get with the folding prop but it still helps!!!

  • February 27, 2016 2:02 PM
    Reply # 3848383 on 3808964

    Hi Tom and all, 

    I kept the original transmission and had it rebuilt. I also remeasured the shaft and it is 1 1/4 shaft. The yard worker had told me that it was 1 1/8… 

    Good point on the chain for the pedestal. I will clean and inspect it. Been busy redoing the fuel supply system and electrical. The engine may be put in after next week. Unfortunately, still have to replace fuel and water tanks, but may be able to get buy with the wing tanks and tackle that project next winter. We'll see.  

    All the best,


    W42 Cadence

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