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  1. Scott Danforth

    Mounting Bolt Compression of Transom

    The transom is the only wood. But all the foam is water soaked. While you can extract the water with a vacuum pump, the foam is broken down
  2. Scott Danforth

    Mounting Bolt Compression of Transom

    Motor can be held with 3 bolts to pull the 4th
  3. Scott Danforth

    using a gm 181 marine head on a industrial 181

    Let's put it this way. The marine motor IS the industrial motor with a marine head gasket and a marine water pump. It is sold to the boat motor companies that add their fuel system and manifold There are 15 3.0 industrial motors for every 1 marine 3.0 motor The issue you may run into is the...
  4. Scott Danforth

    Needing higher rpm

    Can't just pull a motor off a planing hull and slap on a displacement hull and hope for the best Go thru the fuel system Check compression Check ignition Check mounting height Verify HP rating of boat
  5. Scott Danforth

    Got my new stainless tilt release valve, and it shows up like this. Ugh.

    But new o-rings. The others are probably about to let go as well
  6. Scott Danforth

    Needing higher rpm

    An 18' pontoon with a 40hp will do about 22mph. Many times adding more HP just makes more noise and burns more fuel Is the toon transom rated for 115hp? Is the motor high enough? Where is the AV plate with respect to the water while you are underway? Most pontoon installations have the...
  7. Scott Danforth

    454 information

    Not always Make sure to verify the crank part number The magnum was assembled in house from parts out of the GMPP parts bin using an assembled short block and rectangular port heads. The other came in a crate from GMs Tonowanda engine plant as a long block with oval ports
  8. Scott Danforth

    Understanding the numbers on my boat?

    if you cant tell the difference between a 2-stroke and 4-stroke. you are destined to pay someone who is honest to work on it for you.
  9. Scott Danforth

    "Flat" pontoons

    if you crush a beer can, you cant un-crush it. same goes for toon logs. without a pic, i say you have scrap.
  10. Scott Danforth

    Should I be worried before buying?

    Looking at the pics, the keel was repaired once prior. Also the first pick appears to be a hole, not just a scrape Agree cost of repair can vary. I would talk to a local fiberglass repair shop to get an estimate
  11. Scott Danforth

    1988 Chaparral

    Any fiberglass boat older than early 2000's should be considered a project and have rot The 4th sticky down has all the information you need to restore your boat. Read links 14, 15, 18, 2, 3, 4a, and 4b in that order. Look at every picture, watch every video
  12. Scott Danforth

    Rocker torque on aq205a

    You have adjustable value train. So 1/2-3/4 turn past zero last
  13. Scott Danforth

    3.0 MPI distributor? Specs needed

    There is also the 4-cylinder DIS systems that have MAP sensors and can be programed for spark mapping http://www.sdsefi.com/cpiauto.htm
  14. Scott Danforth

    3.0 MPI distributor? Specs needed

    I agree with in principle with a caveat If you are under boost all the time, then the 23 degree curve may be ok. However it will drink fuel more than a V8 The points can be used as a trigger for the MSD, therefore never wearing There are better alternatives to pertronix At low boost / light...
  15. Scott Danforth

    454 information

    If the old engine and new heads are both oval or both rectangular. The whole induction can be reused. The exhaust can also be reused. With a small spacer, the whole accessory drive can be used
  16. Scott Danforth

    454 information

    I can give you a naturally aspirated boat motor at 7.4hp running a carb close to 500hp or 250 hp. I can take that same 7.4 liter displacement in a non-marine application and get well over 800hp with a carb or EFI has nothing to do with how big the cake is, it depends on the ingredients and...
  17. Scott Danforth

    3.0 MPI distributor? Specs needed

    Did you reach out to Tom? he usually answers back within a day.
  18. Scott Danforth

    454 information

    the standard 7.4's are oval port motors the magnum is a rectangular port motor with a different cam
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