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  1. jimmbo

    compression on a 9.9 pull start

    Both cylinders are close to each other, and these 2 strokes aren't high compression Engines. So if it runs fine, I wouldn't lose any Sleep over it
  2. jimmbo

    99 Volvo 5.0GL

    Not on a Chevy 5 Liter
  3. jimmbo

    No Spark 1971 Evinrude 60hp

    In the late 70s we used to "borrow" the neighbours Boat by doing something to get it running without the Key, but we had to wrap a Rope around the Flywheel to start it. Once it was running we could use it. I can't remember if we had Neutral and Reverse, or just Forward.
  4. jimmbo

    New alternator, still low voltage

    What is the Voltage of the Battery, unhooked? And after it is charged with a Battery Charger?
  5. jimmbo

    Mercury 80 HP outboard

    If the Test Tank is bigger than a Garbage Can, Maybe. The Prop needs an uninterrupted supply of water to be properly loaded, that means no Air, which happens when the Test Tank is too small As for keeping it running, with the Cable unhooked, the linkage will move very easily at the Engine.
  6. jimmbo

    New alternator, still low voltage

    Have you tested the Voltage Drops along the Circuit? What is powered, that draws a large Electrical Load?
  7. jimmbo

    1993 Mercruiser 350 Ski Magnum carbed oil type

    My 2002 5.7 VP, the Manual, said SAE 30 Synthetic, nowhere in the Manual did Volvo spec a Multigrade.
  8. jimmbo

    New alternator, still low voltage

    Are You just going by the Dash Gauge, or have you used a Multi Meter to measure the Voltage at the Battery, Alternator, and any connections in between?
  9. jimmbo

    Mercury 80 hp portable fuel tank

    You can do whatever you want, it is your motor, and your money... I will Never assume the Oil and Gas mix themselves. They have different Densities...
  10. jimmbo

    No Spark 1971 Evinrude 60hp

  11. jimmbo

    Fuel for older Evinrude/ Johnson

    Is that "Slight Bump" referring to more power? Even with a slight Increase in Fuel Economy with 93 Octane, the Cost per Mile is still higher than with 87 Octane
  12. jimmbo

    Fuel for older Evinrude/ Johnson

    That Carbon Build Up on the Valves is from Crankcase Vapours from the PCV. Older FI Engines which sprayed the Fuel upstream of the Intake Valves, didn't have much crude on the Valve Face, because of the Detergents in the Gas washed the Valves. Newer DI Engines actually had an Injector added to...
  13. jimmbo

    Fuel for older Evinrude/ Johnson

    Only thing I ever found Seafoam good for was, Nothing
  14. jimmbo

    Running Rough at Idle

    There is no Idle Timing Spec. That "2ATDC-6BTDC" spec is the Pickup Timing, which would the Spark Advance, where the Carbs ever so slightly move from Fully Closed. When you adjust the Idle Speed, you are adjusting the Idle Timing. If you were turning some screw to open the Carbs, or as fiddled...
  15. jimmbo

    rodent infestation

    I put Croutons soaked in Antifreeze out for them, takes care of Gulls also
  16. jimmbo

    Mercury 80 hp portable fuel tank

    I know this will get Responses that I am full of it, but having dealt with these Motors for over 50 yrs and seen what Improper Mixing does... It still needs Agitation, mixing to mix. Pouring the Oil in to a tank, then adding fuel doesn't do a great job, filling the Tank, then pouring in the Oil...
  17. jimmbo

    Mercury 80 HP outboard

    You have to disconnect the Throttle Cable when making the Idle Speed Adjustment(in Gear). Once it is correct, the Length of the Throttle Cable will need to be adjusted so there is a slight Preload(Pressure against the Idle Stop on the Throttle Linkage) on it. Too little Preload and the Idle...
  18. jimmbo

    Fuel for older Evinrude/ Johnson

    1964 was the Year OMC went to 50:1. TCW Oils hadn't been created yet. They appeared in about 1966 Some of the 1957 - 1963 OMC Engines could run on 50:1 instead of the Speced 24:1. These were the 35hp and the 40hp models, and all the V4s. They were all Anti-Friction Powerheads, with no Friction...
  19. jimmbo

    1985 Starcraft porpoising issue. Prop??

  20. jimmbo

    1985 Starcraft porpoising issue. Prop??

    What year is the Boat and Motor? Regarding the differing WOT Ranges, Merc might have made some changes to the Motor, and needed the Higher Rpm to get the Rated HP.
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