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  1. Scott Danforth

    Update Yamaha to NMEA

    if your ECU doesnt support it, you can run an add-on gateway and run separate sensors for oil pressure and water temp. many ECU's dont like to share sensor signals.
  2. Scott Danforth

    Looking for best 2 cycle motor

    Whats the boat rated for?
  3. Scott Danforth

    Do you know what this is? See pic.

    its the remainder of the lift ring from the back of the head
  4. Scott Danforth

    Update Yamaha to NMEA

    if yamaha says no and your motor doesnt support NMEA 2000 backbone. your only other choice is to double up the engine sensors on the engine and add a NMEA 2000 engine gateway. or not go with NMEA gauges or sell your motor and buy a newer one
  5. Scott Danforth

    Where to get a manual?

    the OEM manual is best you can get it from your local dealer or direct from brunswick https://publications.brunswick.com/
  6. Scott Danforth

    Amazing 3D Printing

    the sad part is in reality, that took about 8 hours before the part went kablam
  7. Scott Danforth

    No spark 4.3 Mercruiser

    you also need to go thru the troubleshooting tree. see this thread https://forums.iboats.com/threads/how-mercruiser-thunderbolt-ignition-systems-work.676476/
  8. Scott Danforth

    Looking for best 2 cycle motor

    Depending on vintage, an evinrude V4 would be fairly reliable, however I would drop a merc in it
  9. Scott Danforth

    So, what did you do today?

    A marinized holley 950HP (950cfm HP series)going on the BBC.....replacing a 715cfm vacuum secondary
  10. Scott Danforth

    Crud in carburetor, is it a problem?

    Get a mercruiser or quicksilver kit
  11. Scott Danforth

    So, what did you do today?

    yesterday, put away the camping gear from camping during ETA. Finished building my 950HP carb for the salt shaker. Today, cleaned the garage
  12. Scott Danforth

    No spark 4.3 Mercruiser

    first and foremost, welcome aboard second, look at the stickies at the top of the forum and go thru the troubleshooting for the TB4 and TB5 ignition. DO NOT JUST THROW MONEY AT IT. do a proper diagnostics most likely the trigger is bad (its about $40)
  13. Scott Danforth

    ENGINE SWAP built 383 in and stock 454 out

    define healthy, especially the cam card and the compression. what works well for a hot rod, really sucks for a boat motor. think less hot-rod, and more dump truck pulling a trailer up-hill in 4th gear in sand. most hot-rod cams will suck water in on a boat. anything over 270 degrees of...
  14. Scott Danforth

    The new guy

    you do know that free boats are the most expensive boats on the planet. they usually require spending 2-3 times what one should spend to restore a boat because they usually are too far gone.
  15. Scott Danforth

    1988 GM 5L, spark plugs too tight to get out....

    the only tip to add....change the plugs more often
  16. Scott Danforth

    The new guy

    welcome to months of grinding, cutting, gutting....frustration, itching, and enjoyment.....
  17. Scott Danforth

    Merc mariner not peeing

    https://publications.brunswick.com/ you will have to call them since its not a current product. you can also visit your local mercury dealer.
  18. Scott Danforth

    duoprop shake slowly when turn right-left

    did you smack your props on something? if you have dinged props, your drive will shake like a dog passing a peach pit.
  19. Scott Danforth

    Crud in carburetor, is it a problem?

    yes. clean your carb, clean the inlet filter, and check your fuel if there is water in it.
  20. Scott Danforth

    Replacing batwing manifold questions (and other questions)

    some light reading on the 4.3. https://forums.iboats.com/threads/complete-history-of-the-4-3-liter-with-casting-numbers.693935/ your 1991 motor was a 1988-1991/92 vintage only. your 2008 motor would be a 2007 and later 4.3 4.3families are 1985 only (2-piece RMS seal) 1986 1987-1988 1988-1992...
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