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  1. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    Quick Update: I got the bearings out of the upper retainer . . . racerone the heat idea did the trick nicely :thumb: Then, I pressed the needle bearing out. The Needle is a Torrington J1210, of course Torrington Bearing is no more - became part of Timken Bearing. I am having 1 challenge...
  2. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    I think it was Rick who said it was bound to be something simple . . . . . . and here it is. I showed it to the Admiral and she just said . . . "that little thing caused all those problems ??? " Yup :rolleyes:
  3. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    Sure do . . . :rolleyes: :D So I ran the engines up to temperature . . . took about 20 minutes to come up to temperature and stay steady Here is where the Port engine ended up Here is where the Starboard engine ended up. Keep in mind that the Starboard engine has 2 small holes in the...
  4. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    UPDATE: I found something when I took the outdrive off . . . That turned out to be a sea shell that apparently grew inside the outdrive water duct and then dislodged and got stuck that the fitting for the intake tube. Not 100% sure this was the source of that problem, but it does fit the...
  5. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    Quick Update: I have been compiling a parts list and suppliers for the parts needed to rebuild the powerhead. I inspected the lower bearing . . . it has markings of "6204" on it, which equates to the 204 bearing family. A fairly common bearing as it seems to be widely used. The parts diagram...
  6. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    I'm seeing these bearing at about $15 each. Can you share your supplier(s) ? I usually like to get more brand name bearings, like Timken, Also, any good sources for the upper and lower seals? I would imagine that they are fairly generic. The Merc part for the lower seal is about $20 :eek...
  7. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    OK, thank you. I am still not sure about water getting sucked into the crankcase, but it could have been. I think my plan should be to do the following: (1) New ball bearings (2) New crankshaft seals (3) New piston rings (4) Hone cylinders (5) New gasket set (6) Clean/Decarb the top of...
  8. tpenfield

    Mercury 7.5 HP Motor Refresh (1969 model year)

    UPDATE: I got the powerhead apart . . . The impact driver did the trick. :thumb: Here are a few photos . . . The 'crack' turned out to be nothing more that a scratch on the piston wall and the pistons have little if any scoring on them. The cylinder walls are smooth. I did see some rust...
  9. tpenfield

    Outboards . . . an emerging trend ???

    I just got this from Formula . . . http://www.formulaboats.com/blog/new-formula-350-cbr-outboard-truly-versatile-boat-water/ Formula has long been a strictly I/O type of boat . . . Looks like the are heading towards outboards.
  10. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    The Iron Flush is done. Not sure how much it will help, but it is probably something I should have done before adding the closed cooling. The was a fair amount of iron 'dust' that came out of the engines. Once the acid solution was neutralized the iron dropped right out and you can see it on...
  11. tpenfield

    Closed Cooling System on Port Engine Running Hot(ter)

    Thunderbolt-5 I suppose . . . probably 70K volts :noidea: I kept the Oxalic Acid in the engines over night and then ran them some more this morning, then drained. The stuff went in the engine as a clear liquid yesterday . . . it came out the color of coffee (or stout beer) today., as shown in...
  12. tpenfield

    Painting a S/S Prop

    I painted my SS Bravo 3 Prop sets (twin engines) as a means of putting a weak metal directly on the props and also to keep the marine growth down. In order to make sure I got good adhesion, I pre-heated the props to about 200 degrees in the oven, then quickly brought them outside to put cold...
  13. tpenfield

    Smokey - 1980 Johnson 4.5 HP

    Quick Update: Now that I have the engine running fairly well, I decided to re-paint it and put new decals on it. The paint did not quite match the decals, but it looks 100% better than before. Here is the re-paint Here are the decals. I think the 'Johnson...
  14. tpenfield

    Looking at Formula with bravo drives...No impeller in drive??

    coolant cooled engines on my F-330SS So if you see a big heat exchanger on the top/front of the engines . . . then it is 'FWC', aka closed cooling.
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. 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.
  20. 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
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