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  1. J

    need prop advice

    I know this is a complex question. I have a 15 ft old aluminum runabout and a 1974 Johnson 50 HP looper motor (I heard these have low torque) that I'm gonna put on it. The boat is rated for 50 hp max and this boat is light weight compared to my old fiberglass trihull that the motor came off...
  2. J

    Why is dissimilar metal corrosion not a problem on boats?

    I have heard about replacing rivets and other fasteners with ss screws on aluminum boats....as an aircraft mechanic I was always taught that was a huge no no as the steel will corrode the aluminum...just wondered if anyone had a problem with this
  3. J

    After months of looking..finally bought an old Starcraft!

    I finally found a boat worth restoring....its a 1959 Starcraft jet 15 ft.( He says its a '58 but the data plate says "Jet", and in '58 it was called a "Jetstar"..need to do more research I guess) I have a couple of questions off the bat before I start restoring her. I'm gonna put in a new...
  4. J

    Best way to repair leaking rivets?

    What is the best way to fix leaking rivets if you have access to both sides?...I have aircraft mechanic training and am comfortable with a rivet gun and a bucking bar, however is drilling out and replacing the rivet with an oversized one necessary if the old one isn't damaged?...seems like I...
  5. J

    Fabricating a manual or fixed jack plate....

    Anyone have any guides/plans on fabricating a manual or fixed jack plate?..looking for one that can take a 50 hp going on an aluminum boat. Or plans for a Transom elevator.............thanks
  6. J

    transom extension?

    Looking at a 15 ft fiberglass runabout for my 50hp longshaft, but it looks like this boat might take a short shaft. how hard is it to extend the transom up to accomodate a longshaft?
  7. J

    Mid 1980's Mariner 20

    I have a mid 80's Mariner 20 on a pontoon that starts fine but only idles and runs with the choke on. As soon as you put the choke off it dies. As soon as you give it power in gear it dies with the choke on or off. I can get it to move just above idle speed in gear with the choke on and thats...
  8. J

    Scott motor question....

    I found a cool classic boat I'm looking to buy.......I think its a 1962 fiberglass runabout with a 40 horse Scott. The motor is in great shape and has a cool 1950's look to it. I was gonna buy the boat for my 50 horse Johnson but he says all the motor needs is a fuels pump. I dont know anything...
  9. J

    How to prevent hull distortion?

    I'm in the process of removing the cap on my 70's 15 ft. fiberglass trihull for a stringer/transom job. I've heard I could have some fitment issues when I put the cap back on .....how do I keep this from happening?...
  10. J

    fear is realized..........

    So I always suspected something was wrong with my 74' fiberglass tri-hull..... It always seemed way too heavy and listed to one side in the water sitting still... I drilled some inspection holes in the floor last night and took a core sample: foam is completely saturated and could even see...
  11. J

    Best grade of sandpaper

    I have an old fiberglass boat that is BADLY oxidized. I'm gonna do the wetsanding/buffer polishing process to make her shine again. What is the best grade of wet sandpaper to use to cut the oxidation?
  12. J

    How do inspect under the floor?

    Have a 1974 Rinker 15ft. trihull with what looks like a fiberglass impregnated plywood floor??? The floor is pretty solid but the boat leans to the left when sitting still in the water. Could there be water-soaked foam under the floor?.. how do I check for that?
  13. J

    turning a 50hp to a 55hp...hmmmmmm

    I have a 1974 50 hp looper.....I heard you can turn it into a 55 hp by simply changing the carb jets.......seems too good to be true.......... Is it??????
  14. J

    how to grease a throttle cable?

    I have 1974 15 ft fiberglass boat with a 50 horse Johnson. I was wondering the best way to lubricate the throttle/gear shift cables?....boat has been stitting and is hard to move lever....thanks!
  15. J

    what prop to use for trihull?

    have a 1974 Rinkerbuilt trihull (15 ft) with a 50 horse Johnson...it needs a new prop and need some opinions since I'm new to this........the boat is heavy and kind of a plow..will be used for occasional water skiing but also high speed runs on larger lakes (including great lakes)...any...
  16. J

    1974 Johnson 50 exhaust leak?

    I am suspecting an exhaust leak do to lack of performance and weak idle with the motor hood on....it runs great on the water with it off.......how can I tell if it is an exhaust leak and where it is coming from?....thanks for any help..btw....great website!!!!!!! :)
  17. J

    74 Johnson 50 loses performance when hood goes on

    my motor seems to lose performance and wont even idle when I put the engine cover on....runs great with it off.........any ideas?
  18. J

    motor dies when put in gear (load on the engine)

    Help...I have a 1974 Johnson 50...2 cylinder....the motor idles great and free revs great...but as soon as it goes into gear it boggs and dies instantly. I noticed both carbs had a crack in the flange that attaches to the intake manifold...I could actually see onto the carb!........could this be...
  19. J

    Help! New boat owner!!!!

    I just bought a 1974 rinkerbuilt trihull (15 ft)...with a 50 horse...........does anyone know where I can get a top/ cover for it that will fit the snaps? not having any luck but generic covers......also one that will fit the bow..............and I cant find the seat cushions fot the open...
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