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  1. Scott Danforth

    Frozen engine manifold cracks and likelihood of block survival

    since the dealer was too dumb to winterize, I would run away even if they offered a new motor because I would not trust them to swap it correctly, however that is your call the block and heads did NOT survive. being a post 2014 mercruiser designed block, that motor is only available from...
  2. Scott Danforth

    which carb to upgrade/replace too

    here is a side view of the carb. the newer ones have hex screws, the earlier ones have slotted scrws. the whole kit is holley part number 703-036, however you only need the two blue gaskets. you can buy a two pack from Summit and with shipping, etc. have it to you in the UK by Friday...
  3. Scott Danforth

    which carb to upgrade/replace too

    the part changer at the dealer (can not call them a mechanic) did not clean out the accelerator pump passage. on a holley, that is on the bottom of the fuel bowl and first to plug. you are describing a failed accelerator pump circuit. again, your carb is fine, just needs $10 worth of cleaner...
  4. Scott Danforth

    4.3 crankshaft/housing oil leak - next steps?

    mercruiser buys the GM part and multiplies their cost by 5x. the ECM, wiring and exhaust are the only things on that motor that Mercruiser supplied. everything else came from GM here is Achris's write up of the same issue and how it was resolved...
  5. Scott Danforth

    Identify the thread of this screw from my boat

    No, read the book 50 years ago, also own the two bibles of bolted joints
  6. Scott Danforth

    Identify the thread of this screw from my boat

    Phillips screws were designed by Henry Ford to limit the torque that the line workers could apply. The bit would cam out prior to stripping
  7. Scott Danforth

    which carb to upgrade/replace too

    What is your compression? What is the fuel pressure? What is the timing set to? Dying on WOT is most likely fuel delivery, not the carb Doubt the carb need replacement. Been wrenching on Holley carbs for over 50 years Summit racing can get you jets in 3 days from the states. Can even get...
  8. Scott Danforth

    which carb to upgrade/replace too

    It's a Holley 500 CFM 2300. There are only 6 moving parts Get a new mechanic. Seriously, get a new mechanic Only once have I ever had a Holley that could not be simply rebuilt. And that is because it was acid dipped Jets are replaceable, and only $2 each Bowls gaskets are about $2, so...
  9. Scott Danforth

    Identify the thread of this screw from my boat

    We could get in to clutch head screws
  10. Scott Danforth

    Been a little cold.

    Mercury Verado (supercharged) and the optimax (oil cooler)
  11. Scott Danforth

    Color of prop shaft housing Suzuki?

    Your talking the bearing carrier? Color doest matter. If it bothers you, get a rattle can of white paint
  12. Scott Danforth

    Identify the thread of this screw from my boat

    Marine market may get there in 40-70 years
  13. Scott Danforth

    Been a little cold.

    except outboards with oil coolers or charge air coolers where the plumbing dips
  14. Scott Danforth

    Identify the thread of this screw from my boat

    It's a #10-24 x 3/4 oval head screw in 18-8 stainless Don't need a thread gauge either Nearly every US boat manufacturer uses coarse thread imperial fasteners. They do not like metric hardware or fine thread
  15. Scott Danforth

    Identify the thread of this screw from my boat

    since the OP is in the UK My guess is he has the caliper set to 1cm or 10mm or just past 2x the diameter. a #10-24 would have a thread pitch of 10.58 threads over a 10mm lenght
  16. Scott Danforth

    outrrive alignment tool

    you need a shaft alignment tool. an outdrive wont work well, not enough leverage to initially align the bearing. all input shafts of motors 1991 and later are the same dimensions of the tool in the stickies
  17. Scott Danforth

    Identify the thread of this screw from my boat

    looks like #10-24.
  18. Scott Danforth

    Been a little cold.

    office building cools OK ish in the summer, doesnt heat worth a crap. its under 60 in my office.
  19. Scott Danforth

    Been a little cold.

    This aint right. this is the weather underground station that is 100 yards from my house
  20. Scott Danforth

    Engine dieseling

    Things that cause run on Rich fueling Improper timing Running hot The big problem with run on isn't that it happens, it's that last gasp and death rattle when it finally dies. That is the motor running backwards and sucking in water Check your plugs, if they are black, change them and...
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