Need advice on repowering a 37ft Webbers Cover

Discussion in 'Downeast Engine Room' started by Capt Jax, Jan 23, 2020.

  1. Capt Jax

    Capt Jax New Member

    Joined:
    Dec 29, 2018
    Posts:
    3
    Likes Received:
    3
    Howdy from Florida -

    I find myself needing to replace my original 1970 Ford Lehman 120HP Diesel with Velvet Drive transmission for my 1970 37 ft Webbers Cove (40ft with the 3 ft swim platform previous owner added). Long sad story, but it finally gave up the ghost and she is now dead in the water. I am a beginning my search now and seeking wisdom. This is my first venture into the "gotta now shop for a new engine" after owning this boat for 10 years.

    Should I stick with the same HP (120-ish) or should I take advantage of a newer (re-man'd) engine with more HP and probably smaller footprint? I would hope that I can get some more speed out of her with more HP but am I misguided by the limits of hull speed? I have seen other posts with captains claiming 20+ kts with 300-500 HP on their DEs. With the old Ford Lehman on a good day at 75% throttle going downhill I could get it up to around 9-10 kts. With a newer, more powerful could I expect faster speed?

    Any recommendations for an affordable and reliable engine to replace? My local marina and mechanic swears by Cummins and another prefers CATs. I am not too far from Ft. Lauderdale where it seems to have a plethora of Marine Engine warehouses full of rebuilt or remanufactured engines of all kinds and sizes. I am looking to buy used due to budget constraints.

    Any advice on how to begin my search and ultimately purchase would be greatly appreciated. Basically, I don't know what I don't know! Help!

    -Capt Jax
     
  2. Genius

    Genius Captain

    Joined:
    Feb 11, 2016
    Posts:
    3,122
    Likes Received:
    1,664
    Location:
    Rhode Island
    If you want it on the cheap cheap, I'd look for another running 120hp Lehman. I've used them before and I agree, a great engine. If you are looking for more power, remember there are other things associated with this; fuel system/exhaust/shaft/prop/mounts and glass work/air vents/gear ratio and type. Upgrade option suggestions would be cummins 210-315? Or Yanmar 6LP or 6LY. JD 6068 is also a great engine though I don't have much experience with them.

    What's wrong with your Lehman? How many hours? I've seen these engines go over 20k hours.
     
  3. TAftw

    TAftw Senior Member

    Joined:
    May 31, 2015
    Posts:
    197
    Likes Received:
    61
    Location:
    RI
    The lower horsepower Cummins 6BTA’s come up for sale a lot. Even just one of the 210 hp ones would be better than what you’ve got now
     
  4. southshore30

    southshore30 Senior Member

    Joined:
    Feb 22, 2012
    Posts:
    367
    Likes Received:
    173
    Occupation:
    firefighter/EMT
    Location:
    Cape Cod,MA
    Boat Make:
    Calvin Beal/Southshore 30
    I know a guy with one of those boats and he repowered a few years back with a 3126 Cat I believe. I think he’s around 300 hp and he still doesn’t get anything over 16 knots. Not sure the hull speed allows it
     
  5. Quik Fix 16

    Quik Fix 16 Senior Member

    Joined:
    Jan 29, 2019
    Posts:
    297
    Likes Received:
    132
    Occupation:
    Fiiberglass guy
    Location:
    Emerald Isle, N.C.
    Boat Make:
    Shamrock
    What would a reman Cummins 6BTA 270 hp go for?
     
  6. Quik Fix 16

    Quik Fix 16 Senior Member

    Joined:
    Jan 29, 2019
    Posts:
    297
    Likes Received:
    132
    Occupation:
    Fiiberglass guy
    Location:
    Emerald Isle, N.C.
    Boat Make:
    Shamrock
    Thanks, found them online, $12,000.
     
  7. djmarchand

    djmarchand Captain

    Joined:
    Jul 24, 2012
    Posts:
    646
    Likes Received:
    263
    Occupation:
    Retired engineer
    Location:
    Litchfield, CT / Punta Gorda, Fl
    Boat Make:
    Atlas Pompano 23 outboard
    Is this a recreational boat with all of the weight inside that intails? If so if you want to go fairly fast, say cruise at 16-18 kts I think you need at least an 8 liter engine of 400+ hp. With that engine running at that speed will require maybe 300 hp continuous output. The Cummins C whether the mechanical 6CTA or the new QSC will do that.

    If you can live with cruising at 15 kts or less then the Cummins B engines will work ok.

    Somewhere in between a newish Cummins QSB 6.7 will probably work.

    All of the above except perhaps for the newish Cummins are available as factory remans. That is what I would do, probably a Cummins 6CTA 450.

    David
     
  8. winterking

    winterking Captain

    Joined:
    Dec 25, 2011
    Posts:
    624
    Likes Received:
    219
    Location:
    NJ
     
  9. winterking

    winterking Captain

    Joined:
    Dec 25, 2011
    Posts:
    624
    Likes Received:
    219
    Location:
    NJ
    I somehow lost my post....
    David,
    I Meant to ask why do you recommend the 8 liter engine, is their an advantage over the others you mentioned?
    Thanks! Tom
     
  10. Bill

    Bill Administrator

    Joined:
    Aug 30, 2011
    Posts:
    3,393
    Likes Received:
    2,421
    Location:
    Hull, Ma
    Boat Make:
    27 Terry Jason
    Jax I would opt to find another Lehman and just replace what’s there. You will prob have to change out the gear / shaft / prop / shaft seals etc if you go bigger and opens up a can to go how much faster and how much more is it worth resale with engine 1 vs 2? ...I would find one that will bolt back up and get the boat running again ..
     
    Last edited: Jan 29, 2020
    Bill,
  11. Genius

    Genius Captain

    Joined:
    Feb 11, 2016
    Posts:
    3,122
    Likes Received:
    1,664
    Location:
    Rhode Island
    Why is the engine toast? They are hard to kill.

    I wouldn't want a lifeboat engine. They are run like shit and maintained like shit. Low hours yes, but that's not what sells me on an engine.

    Seriously... A running Lehman engine can be found very very easily. For cheap money. Installation would be extremely easy compared to another engine. You would also have your old engine as a parts donor.
     
  12. Capt Jax

    Capt Jax New Member

    Joined:
    Dec 29, 2018
    Posts:
    3
    Likes Received:
    3
    Thank you all for the input. All very good points to consider. This is quite an adventure but also a good opportunity to Make A Lobster Boat Great Again (MALBA)!! I shall report back with details as I progress with this repower and pictures!!

    Capt Jax
     
  13. Genius

    Genius Captain

    Joined:
    Feb 11, 2016
    Posts:
    3,122
    Likes Received:
    1,664
    Location:
    Rhode Island
    FYI
     

    Attached Files:

Share This Page