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  1. Scott Danforth

    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    the casting numbers are always in the once spot - behind the starboard side head deck, on top of the flywheel housing embossment. the engine serial number from GM is on the port side (not needed).
  2. Scott Danforth

    Engine won’t turn over

    Stickies are the permenant posts "stuck" to the tops of the forums like a sticky note. About 95% of your questions will be covered there. Including how to remove a drive.
  3. Scott Danforth

    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    Casting number will start with 101xxxxxx or 125xxxxxx
  4. Scott Danforth

    Merc 7.4l 454 Gen 4 to 5 interchangeable?

    all Chevrolet motors have the same bolt pattern for the flywheel housing. post the engine casting number (behind the starboard cylinder head, on top of the flywheel housing boss)
  5. Scott Danforth

    1985 OMC 800 Stringer - Thump (?)

    what do you mean you have both manuals? you have the original OMC shop manual published by Ken Cook company, right? because if you have a Haynes, Clymer or Chilton manual, you have knee pads or something to prop a wobbly table up with.
  6. Scott Danforth

    Engine won’t turn over

    look at the stickies
  7. Scott Danforth

    Prop selection help

    you dont need calculations, its common sense.
  8. Scott Danforth

    Prop selection help

    whats so hard to understand. you went up 2" in pitch, 1 blade and added 350#. the 4th blade adds a fair amount, the 2" pitch adds a fair amount and the 350# adds a fair amount go down to a 3-blade 19p or a 4 blade 17p
  9. Scott Danforth

    Volvo Penta prop help

    run the F6's. that 8.1 will spin 4800 RPM all day long
  10. Scott Danforth

    Empty trailor weight

    Florida requires actual weight of the trailer. no calculations, no guessing. there are two ways. the easiest way to get a weight of your here in Florida...... Call the trailer manufacturer with the VIN and they send you the shipping weight of the trailer either with a mailed letter or an...
  11. Scott Danforth

    Looking for a bigger boat....

    we cant condone towing weights above your rating. tow capacity is everything attached to the hitch as indicated above. and in many cases is the difference between EVW and GVW i can tell you that in addiont to tow rating, cooling and brakes are much more important. quality of the rear shocks...
  12. Scott Danforth

    Fuel Tank Cleaning

    cut-n-pasting from past threads: Here is what I have done in the past simple cleaning - 2 gallons of simple green, followed by 2 gallons of boiling hot water, go for a drive down a back country gravel road at 40mph - drain removal of fuel deposits - 3-4 gallons of denatured alcohol followed by...
  13. Scott Danforth

    Water Leaking from engine MercCruiser

    Would help if you identified the motor
  14. Scott Danforth

    How too test if PU coil is weak ?

    buy a new cap, dont just sand the connections. follow the instuctions in the manual on setting base timing
  15. Scott Danforth

    What's too old to consider?

    The inner-child in me wants to jump the thing over a levee....... at speed.
  16. Scott Danforth

    Engine Won't Start or Trim Up/down

    chuck up a wire brush in the drill or grab 100 grit sand paper
  17. Scott Danforth

    Engine Won't Start or Trim Up/down

    First, welcome aboard Second, check your battery cable connections (all of them, at the battery, the block, the starter and the slave solenoid). they should be clean, shiny and tight. clean enough for your mother-in-law to eat off them. if you have wing nuts, remove them, and throw them...
  18. Scott Danforth

    Happy Birthday colonel_sanders

    Happy Birthday.......fried chicken and mayo products aside........ have a good one.
  19. Scott Danforth

    Diningroom table - with epoxy?

    just dont add up the boat receipts......
  20. Scott Danforth

    73' mercruiser rewire

    Here is a link to service manual one, section C (electrical) https://boatinfo.no/lib/mercruiser/manuals/mercruiser1.html#/180
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