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  1. jimmbo

    How do you guys mix Gas

    I have enough experience with them to know they are Gutless for pulling Skiers, unless they are triple or quadruple the HP of a 2 Stroke. Sure you can prop it so it has a bit more Low End Torque, but then you are overrevving to get to a Skiing Speed. Government Order, is why they are pretty much...
  2. jimmbo

    How do you guys mix Gas

    Do not like 4 stroke outboards. Every one I have been on, is slow as Molasses, and A 2 stroke would have across the Lake and back before the 4 stroke got up on Plane. I used to think I/Os were slow accelerators, but they beat the 4 Stroke Outboards
  3. jimmbo

    Oil change interval, synthetic or no, curious what we all do

    Few Flat Tappet Gas Engines are newer designs so there won't be any DI on them, and are best Served with Oil for Diesels, Dinosaur, or Synthetic. My LTs were speced for Dyno Oil(in a Vette, without the Engine Oil Cooler, Synthetic was speced), yet the Oil Life monitor goes far longer than the...
  4. jimmbo

    Oil change interval, synthetic or no, curious what we all do

    I am very skeptical of all the Snake Oil Claims, of running with no oil. Bearings, especially Friction Bearings need Oil, not just for reducing Friction, but also to prevent Metal to Metal contact and to provide a Cushion. Remove the Oil and all that is gone. It doesn't matter what Miracle...
  5. jimmbo

    1972 Cathedral Trihull Prop Size

    On Mercrusier Drives, the Ratio is usually on the Branding on or around the upper Gearcase
  6. jimmbo

    Surge Brakes

    That looks like the one I installed
  7. jimmbo

    How do you guys mix Gas

    I bet a 20hp 2 stroke, could run circles around it. as for the Bold Lettering. Highlight them, then Click on that 'B" above, next to the Slanted I
  8. jimmbo

    How do you guys mix Gas

    They lack the Torque for Acceleration that the old 2 strokes had. Maybe that is why people are now asking if 150hp is enough to pull a Skier, on a 16 ft boat... I have probably been propping boats long before you were born
  9. jimmbo

    How do you guys mix Gas

    I would take an old 2 Stroke in a Heartbeat over any of the gutless take forever to plane 4 Strokes.
  10. jimmbo

    1972 Cathedral Trihull Prop Size

    What is the Final Timing at WOT, and what is the Advance Curve? This might start an argument, but what cam was used, the Marine Grind? Electronic ignitions usually don't restrict the Voltage while running as there are no points to Burn, unless the EI uses points, and some upgrade systems did...
  11. jimmbo

    1972 Cathedral Trihull Prop Size

    You say the engine is rebuilt. How was it rebuilt, like an Auto Engine or as a Marine Engine, as in it has Marine grind Camshaft. Same goes for the Carb and Ignition, are they the Originals or some Auto Parts replacements? If those parts are in fact the correct Marine parts, is it tuned...
  12. jimmbo

    Surge Brakes

    There are many brands of Master Cylinders for Trailer Brakes, I recently replaced an Attwood with, I can't remember what brand, with out too much trouble.
  13. jimmbo

    Asking Open AI How to Change Impeller on 5.5Hp Johnson

    And the Quest for Higher Profits
  14. jimmbo

    Power head swap from 4cylinder to 3 cylinder

    Welcome to iboats. No Crankshaft/Driveshaft Splines are different, and even if they were the same, the Gear Ratios are no where close to each other
  15. jimmbo

    How do you guys mix Gas

    Oil is still heavier/denser than Gasoline, and the Laws of Physics still apply...
  16. jimmbo

    Motor needs help.

    It is amazing how these things can run with a Broken Crank. Even if you replace the Crank, the rest of the Rotating Assembly, Pistons and Rings will need a thorough Inspection. Cheaper to replace it with another used/abused engine
  17. jimmbo

    How do you guys mix Gas

    Pouring the oil into a tank of gas, with no mixing, was one of the main Reasons that the Engine Manufacturers, developed the Oil Premixing Systems back in the mid 80s. They were tired of boaters wrecking engines, then blaming the Engine, instead of themselves
  18. jimmbo

    Evinrude 40 HP WorkTwin Question

    Do the Rings have any tension?
  19. jimmbo

    How do you guys mix Gas

    Since you are transporting the Fuel in Jerry Cans, You have a chance to mix it properly. Add a gallon or 2 gas to the Can, add the correct amount of oil for a full can, Put the Cap on the Can, shake it vigorously a few times, fill it to 3/4s full, and shake it again, sloshing the gas-oil around...
  20. jimmbo

    Evinrude 40 HP WorkTwin Question

    Sending you a PM
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