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  1. jimmbo

    1975 9.9 sea horse

    If Fuel is getting to the Carb, it likely means the Check Valves in the Pump are not impeding Flow, as they would if the Lines were Swapped. If the Carb Bowl is filled, by Priming, and the Fuel Level is correct, the engine can run for bit without a working Fuel Pump. However since it won't...
  2. jimmbo

    1975 9.9 sea horse

    With that amount of Cranking, the Tub you have it in should have a Layer of Unburnt Fuel on it. When you took the Carb apart, did you have a Kit with all the Gaskets, core Plugs? How exactly did you clean it? How did you check and set the Float? You are Squeezing the Primer Bulb till it is...
  3. jimmbo

    1975 9.9 sea horse

    You would be surprised how many people either Forget, or don't even know they have use Mixed Fuel when spraying it into the Carb
  4. jimmbo

    No joy on 1969 Evinrude

    Found these. Not factory but it does explain the Timing Marks on the Flywheel. It does assume you have a Test Wheel for it
  5. jimmbo

    1975 9.9 sea horse

    I hate having to ask this but, You are using Mixed Gas, when spraying it into the Carb?
  6. jimmbo

    Second mortgage for a carb?

    Holley puts the Numbers on the Air Horn.
  7. jimmbo

    No joy on 1969 Evinrude

    Do you know why we are always demanding a Large Gap for a Spark Test, even though the Gap on a Plug is usually about 0.030"?
  8. jimmbo

    No joy on 1969 Evinrude

    Using a Spark Tester. You can't gap a Plug to 3/8"
  9. jimmbo

    1990 Johnson 90HP 2 Stroke Bogging - Help!

    6 or 7 bolts hold them on. There might be a few things also bolted on in front of them
  10. jimmbo

    Stuck between pitch

    That little bit of Malarkey has sold Millions of Stainless Steel Props. Any Flex is about 1/100", if that
  11. jimmbo

    Stuck between pitch

    At what rpms does the Cam chosen, provide best Horsepower, and best Torque? What is the Overall Gear Ratio of the Outdrive?
  12. jimmbo

    Stainless Prop Film

    Which is why a few posts back, I thought Low PH. I guess it could be Brackish Water. The water in Lake Mohave is a Chemical Stew, and is quite Brackish.
  13. jimmbo

    1975 9.9 sea horse

    Okay. A few post back I had asked if the Spark could jump a 5/16" gap. I know 5/16" is far wider than the 0.030" plug gap, about 10.5 times greater. Thing is, under Hi Pressure that 0.030" gap, has the Resistance of about a 3/16" gap at 14.7 lbs, which is why large Gaps are required for Spark...
  14. jimmbo

    1975 9.9 sea horse

    You have been focusing pretty much on the Ignition System. What do the Plugs look like? Wet, Oily, dry Carbon? I am asking in order to determine of Fuel is getting to the Cylinder, through the Crankcase. You could remove both plugs, ground the Leads, and pull the Starter Cord repeatedly, have...
  15. jimmbo

    Spray from the outboard

    I love it when the AV Plate is Visible when on Plane. A cupped SS Prop would probably keep a better Bite on the Water, especially on turns
  16. jimmbo

    73 mercury 7.5

    Hold on. Merc Motors before around 1969-1970 used to have the Gearshift Lever close to Horizontal when in Neutral. Lifting it upward, provided Forward, pushing it down, provided Reverse. I guess if someone managed to get the Shift Lever mounted wrong, the Control would appear backward. Post a...
  17. jimmbo

    Stuck between pitch

    I will admit that the OMC Stringer, had a Vastly Superior Trim System, not Partswise, but in how the Change of Trim occurred., By raising/lowering front of the Engine, the resulting Arc of the Outdrive was a much better way, than having the Pivot Point at the Double U-Joint on the shaft going...
  18. jimmbo

    Parts Left Over LOL

    I doubt it is from a 60s 75hp, which leaves the 70s 75 and a newer Merc Did you take the control boxes of either Engine apart?
  19. jimmbo

    73 mercury 7.5

    Welcome to iboats But it has Forward and Neutral?
  20. jimmbo

    Help identifying a motor

    That Decal at the Bottom of the Exhaust housing is the Conformation
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