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  1. jimmbo

    Hydrofoil/Whale Tail Good or Bad

    I am one who Swore at them and still do. If they really did something, the Engine manufacturers would be equipping their motors with AV Plates that size and shape
  2. jimmbo

    Looking for a Definitive Answer On AQ Drive Oil

    I know a lot of People who sold Evinrude/Johnson Outboards and OMC I/Os, who never knew that at one time there were Boats sold under all 3 brands
  3. jimmbo

    1984 Evinrude 25hp mounting

    Your Strap across the Clamp Screws is placing a Rotational Force on the Transom, and the block of Wood is the Bearing-Pivot Point. Set the Lock/Release Lever to Lock, Grab the Gearcase, and Yank away from the boat and see if it remains on the transom I wouldn't trust it at Trolling Speeds, let...
  4. jimmbo

    Modern Engine Thoughts

    The Rotating Assembly of a 2 Stroke, will always be much simpler than any 4 Stroke. Once the Emissions Thing was applied to Outboards, the complexity of things added to the Engine became complex, for both designs of Engine. Newer engines run very nicely, and require little attention from the...
  5. jimmbo

    Looking for a Definitive Answer On AQ Drive Oil

    Probably just someone at Volvo who didn't know the History of the Product Line very well.
  6. jimmbo

    Disconnecting the fuel line, let engine burn gas ?

    Our 57 35hp powerhead was full anti friction bearing
  7. jimmbo

    Modern Engine Thoughts

    I miss the sound and sweet smell of all the 2 Strokes in the early hours of the Day, actually I miss them all hours of the Day when I am at the Lake. I do find a serious decrease in Hole Shot with the 4 Strokes for any given Horsepower, when compared to the 2 Strokes of the past. To me, an...
  8. jimmbo

    1985 50HP 4-cylinder power loss

    Back in the Day(1970s), the Procedure was spray the Stuff in there, when the can was getting close to empty, reduce the rpm a bit and Stall the Engine with an excessive amount, let it sit a couple of Hours, then go roaring down the lake, to blow the stuff out. In the 60s and 70s, OMC Engine...
  9. jimmbo

    Disconnecting the fuel line, let engine burn gas ?

    A lot of OMC Outboards were Needle, Roller, and Ball Bearing going back as far as 1957. Even after the switch to 50:1 in 1964, some of their smaller engines, the 5 1/2 for example, still had Sleeve Bearings for the Lower Crankshaft Bearing. I guess they figured there would still be enough pooled...
  10. jimmbo

    2011 volvo penta 5.0 engine quits after hitting large wake.

    Welcome to iboats A sudden violent rise of the bow, must be causing an Intermittent open/short in the engine harness. Check for any chafed wires that could be grounding, that includes the Harness going to the Helm, as well as under the Dash
  11. jimmbo

    Looking for a Definitive Answer On AQ Drive Oil

    Volvo did market some outboards in the 70s or 80s as I remember seeing them
  12. jimmbo

    1984 75 HP Mercury

    Welcome to iboats Post a Serial # so We can check the correct Parts lists/Diagrams
  13. jimmbo

    Disconnecting the fuel line, let engine burn gas ?

    It is still not a Wise Idea to let one carb dry out before rest of them
  14. jimmbo

    115hp 2 str 4 cyl merc high rpm trouble?

    If the engine ran lean because of the lack of Fuel, you may have mechanical problems. Compression Test Check for a Spark that can jump a 3/8" gap
  15. jimmbo

    1991 5.7 350v8 no acceleration after 2000 rpm - bogging out

    That should direct you to look at the Accelerator Pump Circuit(clogged passages, and/or discharge nozzles), and the Power Enrichment Circuit(power Piston Stuck). The carb is likely a Q-jet, not too hard to service, Most repairs, a even a lot of Cleaning can be done just by removing the Top of...
  16. jimmbo

    1991 5.7 350v8 no acceleration after 2000 rpm - bogging out

    Rebuilding a Carb is more than tearing it apart, and replacing the Gaskets. It involves actually checking the Settings of New as well as Old Parts, and Linkages
  17. jimmbo

    Boat two stroke engine stalls when throttle is applied unless I throttle up very slowly

    Revving in Neutral means Squat. In fact, keep doing it, and you are likely to not have to worry about any Running Issues... You have had several people suggest things to check, Revving it Neutral wasn't one of them. Compression Ignition that can provide a Spark that can jump 3/8" on all...
  18. jimmbo

    Mercury 90 running super rough, fuel coming out from throats of carbs.

    Those Floats have been known to Wedge themselves a bit crooked and refuse to rise up and close the Inlet. At least that was what the ones in my 115 did a few times. I got pretty good at taking the Inlet-cover off the carb, and/or gently tap the fuel bowl with a Rubberized Hammer.
  19. jimmbo

    1985 50HP 4-cylinder power loss

    I hope you ran the engine at WOT under load, after letting it sit for an hour or so.
  20. jimmbo

    1985 50HP 4-cylinder power loss

    Carbon buildup behind the Rings is Gradual, but eventually there comes a point where the Rings can no longer compress, and when that happens, bad things happen to the Rings , Ring Grooves, and or Cylinder Walls
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