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  1. jimmbo

    Everything done but low rpm at WOT. Distributor spring?

    Butchering Already done, No Extra Charge...
  2. jimmbo

    Might this work as a backup?

    There is a Rev Limiter, but a few moments above 6k isn't going to grenade the engine, it's not like it is a Merc 4 cylinder looper. If you are almost at WOT, I doubt you are going to see much further Increases, unless you are Underpropped, but you will have your hand on the Go-Go Lever...
  3. jimmbo

    7.4 flame arrestor to KN

    I wouldn't use anything branded K&N. Over priced Garbage.
  4. jimmbo

    Only goes 20 MPH

    Toss away 98% of what you know about Auto/Truck Engines, if you want to have any Success working on a Marine Engine
  5. jimmbo

    1958 Hydroswift with Kiekhaefer Mark 78 outboard

    You recently had an Inline 6, stripped and rebuilt for $900?
  6. jimmbo

    Only goes 20 MPH

    Much Quieter, and it also buries the Fumes
  7. jimmbo

    Outboard flooding issues

    Good to hear
  8. jimmbo

    Lake depth and how shallow can you run?

    I don't think it is a 25" motor or a 15" Transom. It does look like it is about an 1 or so below where the bottom of the Hull would be. The trailer Bunk is interfering with seeing the Hull Lines Your engine appear to have Power Tilt, maybe even Trim so running with it lifted at low speed is no...
  9. jimmbo

    Need guidance on Prop pitch and Power, 78 Johnson 55hp 55EL78S

    For some reason Part #7 is often forgotten to be installed when a carb is torn apart for cleaning
  10. jimmbo

    Gas

    Could be leaky/bent Fuel Pickup Tube in the Tank that let air in once the Fuel Level drops below it What is the Capacity of the Tank?
  11. jimmbo

    Need guidance on Prop pitch and Power, 78 Johnson 55hp 55EL78S

    Since no one on this Board, can actually see or touch your Outboard, any and all suggestions are based on the Info you provide. If the info is incomplete, or more Info is added, a new reply, seemly in contradiction to earlier replies, may appear. An engine needs 3 things, in the proper amount...
  12. jimmbo

    Dribble of oil at prop, usual suspects checked, now puzzled

    Okay for Pressure Testing, but not good when pulling a Vacuum
  13. jimmbo

    Everything done but low rpm at WOT. Distributor spring?

    And it is a 4150, easier to Calibrate the Secondary Metering, than a 4160, however the pic shows Idle Mixture Screws on the Secondary Metering Block. Could be a generic pic though, as the Throttle Lever shown is an Auto Style versus the Flat one Holley has on their Marine Carbs.
  14. jimmbo

    Motor has no power under load

    Motor can run great on the muff, even if 1/2 cylinders aren't firing. Which it on a 2+2 motor is the Norm Can the Spark jump a 3/8" gap on all cylinders? Some of the 2+2 Motors had Accelerator Pumps on the Carbs(maybe they all did), if they aren't functioning, the engine can't get going fast...
  15. jimmbo

    Everything done but low rpm at WOT. Distributor spring?

    Don't forget the Exchange Rate, Duty and Taxes may apply, and then the Shipping here can get high. Check with a Holley Distributor in the Van area. I got my 4bbl Holley from the Distributor in the Edmonton area 20 yrs ago for a few hundred off Retail.
  16. jimmbo

    Everything done but low rpm at WOT. Distributor spring?

    Okay, your carb is still an Automotive Carb, and I don't know what recalibration, if any, was done to it before you acquired it, The Fuel Delivery Curve could be way off of what an Marine Engine needs. Yrs ago, Holley didn't offer Aftermarket Marine Carbs, they did make some for OMC and Mercury...
  17. jimmbo

    Everything done but low rpm at WOT. Distributor spring?

    FWIW At 100% Volumetric Efficiency a 460 cubic inch inhales 230 cubic inches per rev. so at 5000rpm it would inhale 1,150,000 cubic inches of air, which is 665.5 cubic feet. However since very few Naturally Asperated Engines can achieve 100% VE... I will be generous and allow an engine from the...
  18. jimmbo

    daily music fix

    One of my faves, even though it used a Drum Machine. Lindsay Buckingham
  19. jimmbo

    Out on the Lake Pictures

    Nice looking Boat. Looking at the prop blade in the water, I would guess a 13 1/4" pitch or a 12 1/2"
  20. jimmbo

    are these wires supposed to be connected to eachother?

    A hint of what engine is involved would be a teeny tiny bit of help...
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