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  1. rolmops

    Evinrude 9.5 vs 8hp speed test

    I do not know the exact year, but up to a certain date OMC measured the Horse power rating at the engine drive. Then they started measuring at the propeller shaft and the horse power measured there was always less. For example, the 2 cylinder 35 horse became a 33 horse. In 1985 power was already...
  2. rolmops

    Asking Open AI How to Change Impeller on 5.5Hp Johnson

    We all better see this as writing on the wall. This is only the beginning. I hope you all realize that this very post as we write it, ends up in the computer file of the AI setup. Before too long we will be able to have a conversation with the AI computer just like we used to see on star track...
  3. rolmops

    Help identify model and hear number

    2x
  4. rolmops

    Help identify model and hear number

    Is that a 1957 Herters Boat? It sure looks like the mail order boat.
  5. rolmops

    1987 Evinrude 70HP VRO E70ELCUR

    www.electricaltechnology.org/2020/07/marine-boat-cable-wire-color-codes.html Here are the wiring codes. Trim feed is always independent from the other gauges. Speed often is fed by a pressure setup on the back of your boat. .The faster you go the higher the water pressure pushing into a little...
  6. rolmops

    Tachometer reading up too 1100rpm once engine rpms is increased tach runs back down to below 0..

    Just for the heck of it. On the back of your tach (dependent on the year) you may have adjustments. It often looks like a flathead screw with numbers around it. If you have a 2 cylinder engine it should be on 2 if it is a 3 cylinder it should be a 3. And so on. You may want to check if it is...
  7. rolmops

    55 or 56

    I had a few 1957 35 horse engines in that color and a 1958 in the same pattern but slightly different color patterns. The color name is holiday bronze.They all had pin needle bearings and could already be run on 1:50. (I never did). The one thing most people ignore when writing about oil mixes...
  8. rolmops

    Tachometer reading up too 1100rpm once engine rpms is increased tach runs back down to below 0..

    If everything on your motor runs as it should, your problem is with the tachometer itself. The volt meter going up to 18 volts, points to a defective rectifier.
  9. rolmops

    1988 48 hp impeller housing

    sss
  10. rolmops

    Flame arrester stud

    Does anybody know the parts number of the 1989 4.3 liter Rochester carburetor (twin barrel) flame arrester stud?
  11. rolmops

    Are drive shafts interchangeable before 1992 and after 1993 for 9.9's / 15's

    It is not very hard to make the long shaft shorter. Just take it to a tool and die worker with a lathe and tell him how long you want it. It should not take very long.
  12. rolmops

    Starter wire grounded on block, no spark now.

    ouch!
  13. rolmops

    Starter wire grounded on block, no spark now.

    Are there any fuses that could have blown?
  14. rolmops

    Johnson 55 hp electric start conversion.

    The electric start kit has a rectifier which will slowly charge your battery if you run it at a decent rpm .
  15. rolmops

    JOHNSON 55 HP TILT PIN QUESTION

    During the 36 years that that engine has been around it may well be that the bracket has been changed out for a non original one
  16. rolmops

    Carb hoses on 1990 OMC 3.0

    The hose coming from the pcv valve should go to the flame arrestor. The one from the bottom of the fuel pump should go to the bottom hole on the carburetor and the second one from the valve cover should not be there. That hole should have a cap on it and it is there so you can add or change oil...
  17. rolmops

    1986 Johnson 9.9

    It often happens that a spider or other insect builds a little home in the rubber hose that the water is supposed to squirt out of. Use a piece of wire to make sure that the outlet is not clogged. That often solves the problem
  18. rolmops

    1978 Evinrude, 35 HP starter will not spin the fly wheel

    It never hurts to clean stuff up, This could be a case of plugs that screw in way too deep or simply a battery that is too weak to deal with the compression that this engine produces. A good fact that was mentioned is that without the plugs , it turns over just fine. That to me is a sign that a...
  19. rolmops

    cooling johnson / evinrude 9.9 /15 fourstroke 1998

    That sounds like you were repeating the same mistake every time you changed an impeller. It is time for a step by step with the manual in hand.
  20. rolmops

    cooling johnson / evinrude 9.9 /15 fourstroke 1998

    What you just described sounds like a piece of dirt or rubber clogging a cooling passage in the block. possibly next to the thermostat, or a faulty thermostat. Clean the passages (reverse flow with a garden hose) and check the thermostat.
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