70 hp Johnson gearbox

Discussion in 'Outboards' started by squalus, Mar 10, 2013.

Page 2 of 2
  1. squalus
    Joined: Mar 2013
    Posts: 9
    Likes: 1, Points: 0, Legacy Rep: 33
    Location: cape town

    squalus Junior Member

    Sounds top,pity i am south Africa,it would have come in handy,need a few things...
     
    squalus, Mar 18, 2013
    #16
  2. squalus
    Joined: Mar 2013
    Posts: 9
    Likes: 1, Points: 0, Legacy Rep: 33
    Location: cape town

    squalus Junior Member

    Just thinking out loud here its probably best to do buoyancy test first before spraying the boat....?
     
    squalus, Mar 18, 2013
    #17
  3. Mr Efficiency
    Joined: Oct 2010
    Posts: 10,386
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    Location: Australia

    Mr Efficiency Senior Member

    Classic illustration of why a workshop manual is a must. ;)
     
    Mr Efficiency, Mar 18, 2013
    #18
  4. phillnjack
    Joined: Mar 2013
    Posts: 22
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: united kingdom

    phillnjack Junior Member

    Make sure you dont put any grease on the very top flat of the driveshaft spline.
    just put it along the 2 inches of spline, it can get an hydraluic lock and be a pain to get off in the futre.
     
    phillnjack, Mar 25, 2013
    #19
  5. squalus
    Joined: Mar 2013
    Posts: 9
    Likes: 1, Points: 0, Legacy Rep: 33
    Location: cape town

    squalus Junior Member

    Hi guys,got a question...i spoke to well experienced boat tech,he recons my 18 ft robcraft powered by 2x70 hp Johnson motors need boat stabelisers..too power the boat beter and not so rocky...the boats got more nose than ***...
     
    squalus, Apr 2, 2013
    #20

  7. boatbuilder41
    Joined: Feb 2013
    Posts: 162
    Likes: 8, Points: 18, Legacy Rep: 56
    Location: panama city florida

    boatbuilder41 Senior Member

    With two seventies ,and proped out correctly........you got plenty of ***......that thing should fly. And you wont know much difference, if any ,when you get a load on board. My guess on the props would be 13 3/4 x20 , or maybe 13 3/4 x21. You could wave at the v6's as you fly by. I hope everything works out for you
     
    boatbuilder41, Apr 3, 2013
    #21
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