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  1. jimmbo

    Paint particulars for an aluminum boat restoration.

    Zinc Chromatic Primers were used by Engine Manufacturers to keep the Paint stuck on Gearcases
  2. 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.
  3. jimmbo

    Need help to id the motor

    Davy Jones
  4. jimmbo

    Need help to id the motor

    That is the Serial# This motor looks like it spent time at Davy Jones's Locker?
  5. 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
  6. 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...
  7. 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
  8. 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
  9. jimmbo

    1958 Hydroswift with Kiekhaefer Mark 78 outboard

    It's only 60 hp
  10. 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
  11. 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...
  12. jimmbo

    Only goes 20 MPH

    This is what one Flapper looks like. I have never seen 2 per side
  13. 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.
  14. jimmbo

    Runs Well, Can’t Reach Top Speed??

    What I am saying, is that on every 2 stroke I have ever seen, the Carb(s) are fully closed at Idle, and the Idle Speed is controlled strictly by the Spark Advance/Retardation. A change in Prop Pitch will load an Engine differently, and will affect where the Timing is, to attain the correct in...
  15. jimmbo

    Runs Well, Can’t Reach Top Speed??

    On pretty much every 2 Stroke I have ever seen, there is no Idle Timing spec, as the timing is retarded to determine the Idle Speed, and that will vary depending on the Load on the engine(prop Pitch). The Carb(s) remain fully closed, and are not touched to set Idle Speed.
  16. jimmbo

    1976 6hp Welsh Plug

    You could measure the old one or the spot it goes in with one of these, to get the size
  17. jimmbo

    Runs Well, Can’t Reach Top Speed??

    Then you don't know much about 2 stroke Outboards
  18. jimmbo

    What type fuel hose?

    If a snowmobile has a leaky Fuel Line, no big deal, it drains on the Ground. Not so when that occurs in Boat.
  19. jimmbo

    Runs Well, Can’t Reach Top Speed??

    There is no Idle Timing Spec
  20. jimmbo

    Runs Well, Can’t Reach Top Speed??

    What exactly did you "adjust", and Why? Did you do a Link and Sync, to assure that the Carb is properly Synced to the Timing?
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