Search results

  1. jimmbo

    I’m at a loss - Evinrude 40

    You need to be testing this stuff under Load. Voltage requirements will change when an Engine is loaded. It comes down to this: Compression, Spark, and Fuel, and the correct amount of each for the engine to run as designed. When I asked what the Plugs looked like I was hoping you would take a...
  2. jimmbo

    I’m at a loss - Evinrude 40

    What do the Spark Plugs look like?
  3. jimmbo

    I’m at a loss - Evinrude 40

    On both cylinders?
  4. jimmbo

    I’m at a loss - Evinrude 40

    Try using a Timing Light, and observe the flashes
  5. jimmbo

    I’m at a loss - Evinrude 40

    When you tested for Spark? Could it jump a 3/8" gap consistently?
  6. jimmbo

    I’m at a loss - Evinrude 40

    When people are asking about the Timing Light, they are not necessarily asking about the Timing, but that have you used it to detect an Intermittent Miss of the Ignition. As for the link and Sync... You need the correct Service Manual(preferable Factory) to get the proper settings and...
  7. jimmbo

    I’m at a loss - Evinrude 40

    32.5mph? That sounds a little high, but with one of the prop rated engines(post 84/85), I would expect about 28-29mph
  8. jimmbo

    raising transom on a boat for a long shaft.

    Get a Tilt/Trim Pin for that engine. What kind of Plywood did you choose for your Modification?
  9. jimmbo

    1984 Johnson 35hp tell tale at idle

    Another Vote for that Impeller is Toast. A complete Pump Kit will have you on your way again
  10. jimmbo

    What is necessary for jet change of .002 of an inch?

    Drilling an Orifice is not a Recommended Procedure, as the Original Orifice was likely not drilled, and after drilling, even though the Orifice is now larger, it might actually flow less fuel than prior to drilling Why are you replacing the Jets in the first place? You really don't want to be...
  11. jimmbo

    Skiing behind Scarab Jet Boat

    One would think that the Water behind a Prop Boat would be less solid due to the Turbulence from the Gearcase, the Prop Blades, and from the Engine Exhaust rising up. The Water behind a jet hull should be more Solid as none of those Items exist on a Jet system
  12. jimmbo

    2010 Tahoe Q5i 4.3l will only make 3500-3700 rpm, 32 mph

    I run an Enertia, and have a couple of RAKERs for spares I would scuttle my boat rather put a 4 Blade on it
  13. jimmbo

    Old Evinrude question, Can anyone help?

    This was how it was done on the Cables that would have been used way back when. I think the Newer Cables are preassembled and really can't be tinkered with.
  14. jimmbo

    Old Evinrude question, Can anyone help?

  15. jimmbo

    Old Evinrude question, Can anyone help?

    In 74, I did the Clothesline thing on my dads boat. It lasted about 10 hrs and the Wires Broke, and the Plastic Stretched about 8 inches. Could have been a real Catastrophe. Got the proper Stuff and installed it.
  16. jimmbo

    Choosing first prop to run .

    Some Years, that Bracket was mounted like you have it, then the Next year the Part with the Knob was Flipped around so it was installed from behind, closer to the Engine. Our 57 35hp was that way. If the Face of the Part on the Motor is Flat, then you have it correct. If where the Pin goes...
  17. jimmbo

    Choosing first prop to run .

    Here the Prop Options for that line of Engines from a 1980 Accessory Catalog and here is the OMC Prop chart for the 1960s 40hp Speeds shown at a given RPM would be similar for your motor, as they all have the same Gear Ratio and Rpm Range. However the Load shown are for a bigger engine
  18. jimmbo

    Choosing first prop to run .

    Flexes. That bit of Misinformation has sold many SS Props. In reality, the Blade is very rigid, and the Water will yield far sooner than the Blade. Lock a set of ViseGrips on a Blade and try flexing it. It is more likely to Crack than flex.
  19. jimmbo

    Choosing first prop to run .

    If the Rpm is low with a 11 1/2, it will be a lot lower with the 14 While our Ears are very good at detecting a Frequency Change/Shift, they are not very good at actually measuring the Frequency. A Tach is needed when evaluating/choosing a Prop WOT Range for that engine is 4000-5000 rpm In 72 my...
  20. jimmbo

    Surface drive propeller

    Welcome to iboats Most Outboard Props are not designed for operating Partially Submerged, and are also designed to have Exhaust expelled through them, which is not going to happen when used on a Surface Drive.
Top