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  1. jimmbo

    Buzzing in throttle housing '84 Johnson 90HP 4 cyl

    I will assume you bought the Engine 2nd hand and it didn't come with the Owners Manual, which would have explained why there is a Buzzer/Horn in the Control Unit. zprior to 1968, any Overheat Warning was a Red Light in the Dash, but I suspect by 1968, OMC got the Idea a Audible Warning would...
  2. jimmbo

    Water pump not pumping enough water

    #11 Wear Plates that 'look fine' sometimes aren't
  3. jimmbo

    Water pump not pumping enough water

    If the Pump can't pump much water, it either isn't getting the water to Pump, or it has Mechanical Issues, as too great of Clearances. You say you replaced the Pump Housing, the Wear Plate, the Impeller. What about the Oring at the top of the pump?
  4. jimmbo

    Motor swap, back and forth.

    No Wood in the Transom?
  5. jimmbo

    Motor swap, back and forth.

    Since the 50 is likely Bolted to the Transom, every time you take it off to use the 20, you have to deal with sealing those holes so as not to get the Transom Internals wet.
  6. jimmbo

    Water pump not pumping enough water

    You had the Powerhead off? The Blockage could be prior to the Pump
  7. jimmbo

    Water pump not pumping enough water

    Perhaps a Blockage. Was the old Impeller intact?
  8. jimmbo

    Paint particulars for an aluminum boat restoration.

    Zinc Chromatic Primers were used by Engine Manufacturers to keep the Paint stuck on Gearcases
  9. jimmbo

    Need help to id the motor

    You might have to contact BRP. OMC motors were identified with Model #s but there might be a record of the Serial #s at BRP.
  10. jimmbo

    Need help to id the motor

    Davy Jones
  11. jimmbo

    Need help to id the motor

    That is the Serial# This motor looks like it spent time at Davy Jones's Locker?
  12. jimmbo

    Need help to id the motor

    Kind of like; Can you name this Song from One Note? The disc with the Serial#, and possibly the Model# is visible in the 6th pic
  13. jimmbo

    What engine in new boat

    VP would have had put a 2bbl 500CFM(370cfm when flow rated like a 4bbl)Holley, which was Perfectly sized for a 5 liter spinning 5000. However on a 5.7 it was a bit too small. They did put a very nice 4bbl Intake under it though. There is a noticeable difference in Torque between a 5 liter and a...
  14. jimmbo

    New Motor same power issue

    New Block, same ol Ignition, same ol Carb. Perhaps you are getting Crossfire, make sure the Plug Wires aren't all nicely tied together, check the Cap for Carbon Tracks inside. Electricity want's to complete the Circuit, and doesn't care what path it needs/uses
  15. jimmbo

    Help prop an old boat?

    A 17" or 19" would be a good place to start. WOT range for that Engine is 4800-5300 BTW your engine, well the Cowl Wrap, is a 74. A 72 would have Kiekhaefer Mercury on the Faceplate. Yours has Mercury Marine
  16. jimmbo

    1958 Hydroswift with Kiekhaefer Mark 78 outboard

    It's only 60 hp
  17. jimmbo

    1975 9.9 sea horse

    The Sweet Smell of TCW, is one that I Cherish. The more smoke the better, keeps the Skeeters away
  18. jimmbo

    Rope caught in Prop!

    Engine stalled at idle is what happened to it. If it was going 2000rpm and came to an instant stop, yes then I would be worried. Does your Prop have a Rubber Hub, or one of the Shattering Style of replaceable hubs? You can always pull the Prop, and you will find no Damage, but it gives you a...
  19. jimmbo

    Only goes 20 MPH

    This is what one Flapper looks like. I have never seen 2 per side
  20. jimmbo

    Runs Well, Can’t Reach Top Speed??

    No 2 Stroke Outboard I have ever seen the past 60+yrs has ever had an Idle Speed Adjustment done at the Carb.
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