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  1. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    FWIW - and because I like graphs, here is a graph of the compression data since 2012. . . My nomenclature is: "SL1" = 'Starboard engine' , 'Left Side', 'Cylinder #1' I think the surveyor rounded 'up' to the nearest 5 psi, which is probably a standard practice. I try to be a bit more...
  2. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    Thanks, guys. I'll get an impact driver and see what I can do. Since the bolts are in the crankcase portion of the engine, I assume they will have oil that seeped into them to some extent . . . as opposed to the water jacket covers which had corrosion. I brought the powerhead and the swivel...
  3. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    OK, thanks, makes sens. I got to find my flywheel puller. I got most of the motor apart at this point. Trick is not breaking anything. I'm not sure that I will be able to get the Phillips head bolts off, so maybe I will drill the heads off and replace them. The steering swivel has been...
  4. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    I would assume that the MEFI does an analog to digital conversion of the sender's resistance value. One thing I noticed today as I did some more running of the engines, is that the ECT temp changes in increments, as if the MEFI has pre-set values to display and it is a matter of what the A/D...
  5. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    I got the powerhead removed from the shaft/housing . . . Here is the base . . . The underside of the powehead Not sure on the next steps to open up the crankcase. Area of lower seal. Nothing jumps out at me, but maybe once I open up the crankcase I'll know more.
  6. tpenfield

    No sea strainers on my boat ?

    Not standard issue with the Merc's . . . not sure about the Volvo's Plenty of after market strainers, and I highly recommend them, particularly with closed cooling. I got these for my twin 7.4 MPI's
  7. tpenfield

    Best way to paint a outboard.

    I use a primer called Primocon (Interlux) Sometimes I use the Moeller Zinc primer. Just painted one of my outboards . . .I used a solvent to wipe down the engine & cowling to get rid of the oil/grease, then primed the exposed aluminum areas (mostly on the lower unit) I just painted my 4.5 HP...
  8. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    OK, all set with the Starboard engine t-stat installation. I ran the starboard engine up to temperature with the new t-stat (w/ 2 small by-pass holes). the engine settles in at about 168 per the gauge at idle speeds and no load. So that is the same as the port engine. We are...
  9. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    Update: I think I found a crack in the side of the top cylinder. Not that it would contribute to water inhalation, but an issue nonetheless. It is on the intake side and is visible at the middle port. Here are a couple pictures. I made those up/down scratch marks running a needle over the...
  10. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    Yes, back in the day, the Johnny's and Evinrude's were the pick of the ocean. Merc's were more the fresh water engine. 1978-79 is when they got on board. My carbon steel shaft lasted 1 season in the salt. The cleaner of the 2 spark plugs was the lower plug. . . . it looked slightly clean...
  11. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    Quick Update: I'm working on the boat today to see if I can get the leak at the thermostat housing resolved. When I took everything apart and was checking the mating surface of the housing to the intake manifold, I noticed that the surface was not completely flat and the t-stat housing could...
  12. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    I have a 1969 Mercury 7.5 HP outboard that I use for my dinghy/tender. It seems to be seeping through the gaskets around the water jackets over the past couple of years. So I thought I would do a refresh of the motor and share some pictures of the project. I also plan on a bit of cosmetic work...
  13. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    Starboard Engine Update: I checked the starboard engine heat exchanger, and it needed a bit of TLC, similar to what I found on the port engine. Here are a few pictures, about 6-8 holes blocked on each end of the H.E. This end, maybe 12-14 holes blocked . . . So, I cleaned the ends and...
  14. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    UPDATE: Now that I have the boat out of the water for the season, it is a lot easier to do diagnostic work. So, today, I took the inlet hose and the barb fitting off of the inside transom assembly to get a better check for 'Bravoitis'. Here are a couple of pictures of the hose and insert that...
  15. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    Interestingly enough . . . I was cleaning out the garage this weekend and came across a box of stuff that was from the boat when I bought it 4 years ago . . . and found these :eek: :D Makes me wonder if the PO was chasing some cooling problems :noidea:
  16. tpenfield

    Crazy idea? Marrying stringers

    Not all that crazy, but I would 'sister' the joint on both sides. . . Here is what that would look like (pictures from my thread here on iBoats) , as I did that sort of thing on my 24 foot Cuddy, where the main stringers had only about 1 foot of rot in them and were fine the rest of the way...
  17. tpenfield

    Getting ready for winter in snow country!

    The tough thing about using frame and tarp (instead of frame and shrinkwrap) is that it is harder to get the covering tight enough to shed the snow in all cases. A lot depends on the type of storm . . . if it is very cold, then the snow will tend to shed easily, if it is just below freezing...
  18. tpenfield

    O'Day Mariner Sailboat Restoration

    Boat Renaming ??? I am doing a bit of prep work on the upper portions of the hull, and the boat name is a concern. The name "Little Jeannie" seems like it has meaning to a previous owner, but it has no meaning to me. So, I would like to change the name of the boat, but superstition...
  19. tpenfield

    O'Day Mariner Sailboat Restoration

    3 Coats of anti-fouling done. I just need to do a final coat on the keel and rudder and let everything harden up. Then I can think about putting the keel in the boat.
  20. tpenfield

    1989 MCM 7.4L Bravo Sea Water Pump Impeller Change.. NEED HELP.

    I had the same setup in my 1991 Merc 7.4 bravo. I would just take the pump off via the 2 bolts that the pump and bracket hang from. The top bolt has a slotted hole in the bracket and the bottom bolt is more for holding the belt tension. When re-installing I think I needed a lever bar to tension...
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