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  1. Scott Danforth

    Missing timing tab? Merc 4.3 2005

    Post #3 shows a 1995 or older timing tab
  2. Scott Danforth

    Mercruiser 230 v8 milky oil

    if it was a cracked block, normally the oil mikshake would push out the breathers. however it only takes about 6 ounces of water in the oil to make a milkshake. pressure test as Scott suggested (need to drain the water first). it should hold 15psi forever. if it passes, change oil at least...
  3. Scott Danforth

    5.7l mercruiser gen 1 alpha 1 to vortec head swap problem please help...

    I am pretty sure you were running lean. your comment on plugs looking clean would collaborate. I know when I put vortec heads on the '88, and changed the cam, I was running 75 primary jets and 92 secondary on the Holley 715 (up from 2 primary and 85 secondary) I may have been running a tad...
  4. Scott Danforth

    5.7l mercruiser gen 1 alpha 1 to vortec head swap problem please help...

    correct, however premium gas in montana is 89 octane, premium in Wisconsin is 91, and premium gas in florida is 93 octane. OP also stated running old fuel with stabilizer. as fuel gets past 6 months, it starts to break down however octane doesnt matter if you are running lean
  5. Scott Danforth

    Using Neoprene Strips to Cushion Marine Gas Tank

    how about EPDM rubber strips that wont absorb water and hold it against the tank. historically they used roofing felt (tar paper) folded twice. I would not use any foam weather stripping as it will hold moisture against the tank
  6. Scott Danforth

    Underpowered Yamaha 9.9

    I get 15mph on a 14' boat with 15hp. your fine in your 14' boat at 14mph with a 9.9 if you believe youtube, please see the doc for a session on the couch
  7. Scott Danforth

    5.7l mercruiser gen 1 alpha 1 to vortec head swap problem please help...

    with the flat top pistons that are in the engine, and with vortec heads, the compression ratio is 9.4:1 the heads on the 91 should have been 64cc heads just like the vortec, however the vortec heads have the LT3 combustion chamber on my AQ271, I had run stock GM block, comp cam XM262 and...
  8. Scott Danforth

    Mercruiser Parts Shortage?

    Mcmaster Carr also sells stainless rod and some tapping dies
  9. Scott Danforth

    Trolling motors on ski boats

    or the ones that mount on the trim tabs lenco makes the troll-n-tabs
  10. Scott Danforth

    5.7l mercruiser gen 1 alpha 1 to vortec head swap problem please help...

    agreed, plugs should be caramel brown and not "still mostly clean" if you did not re-jet, that is one part of the problem. to loose the head gasket, you would have to have either lots of piston eating detonation or you havent got sufficient clamping.
  11. Scott Danforth

    Time for a ‘new’ boat?

    Hey Ted, have you looked at the new Aviaras? https://www.aviaraboats.com/#welcome Matercrafts upscale line, made in Vonore TN available as both I/O and OB
  12. Scott Danforth

    5.7l mercruiser gen 1 alpha 1 to vortec head swap problem please help...

    first, welcome aboard second, what year motor did you start with?what style of ignition? did you read your plugs after your conversion? was the motor seriously overheated? did you re-jet your carburetor? tuliped valves come from overheat and running lean. to blow a head gasket means that...
  13. Scott Danforth

    ignition switch source for fuel pump relay kit?

    why would you replace a $49 mechanical fuel pump that will last 30 years with a $89 electric pump with $15 worth of relay, oil pressure switch and wiring that will only last about 10? mechanical fuel pumps are superior to electric pumps in so many ways.
  14. Scott Danforth

    Timing issue??? 1989 Sunbird Corsica 185

    first, welcome aboard most likely your shift cable needs adjustment or replacment. sounds like the ESA module is being engaged.
  15. Scott Danforth

    How could I identify my boat online?

    what does the paperwork say it is (title, registration and bill of sale) remember, over the 100 years prior to the internet, hundreds of thousands of boat builders came and went, many only building one or two models.
  16. Scott Danforth

    High oil pressure smell of gas in oil

    Maybe in your car, however not in a boat
  17. Scott Danforth

    1993 Mercruiser 4.3 2bbl carb running out of power

    Carter pump (oem) from summit is $49
  18. Scott Danforth

    Need advice on a tower for a 1992 Fourwinns Horizon 200

    If you dont want to buy new (BTW, much more than $2000 in 2021), Start looking for used on CL or ebay
  19. Scott Danforth

    High oil pressure smell of gas in oil

    Well, that is a very important piece of information to troubleshoot your motor. I would get the test fitting, and a good fuel gauge
  20. Scott Danforth

    High oil pressure smell of gas in oil

    Your fuel pressure is 60psi? On a carbureted motor? Cant happen. Carbs are generally 2-5 psi, 6 max. Above 7 psi, the needle and seat wont close 60 psi is also higher than EFI motors (45 psi) So, what is your fuel pressure?
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