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  1. jimmbo

    1973 johnson 25hp 25R73A

    I really don't like the idea of using a Flex Hone on 2 Strokes, as the balls can mess with the Ports. Rigid Hones can also reveal Wear, by not contacting the Worn Areas. As for the Impeller, I suspect the previous Installer was wiggling the Driveshaft back and forth, instead of turning it...
  2. jimmbo

    2021 Mercury 115 Pro XS cavitating

    On my last Outboard, the Anti-Ventilation plate was a good 2 inches above the Bottom of the hull, and the prop had a good bite on the water
  3. jimmbo

    Part interchange

    Not many parts will change as Mercury made major changes in 1964, in their effort to Silence the Beasts. Though things like Carbs and Ignition are likely to be transferable.
  4. jimmbo

    Mercury 60 HP engine question

    Yes, it certainly is Doable
  5. jimmbo

    Does EFI solve the hard start/cranking issue?

    Does your FI car start instantly? I do enjoy watching people, used to FI, try and start a non-TKS carbed Boat. They will grind on the Starter forever, when a Slight Movement of the Throttle will set the Choke, and squirt a bit of gas into the Intake as a Prime. My Carbed I/O gets the choke set...
  6. jimmbo

    Are all 9.9 carbs the same from 93 to 95 to 98

    Maybe, but did you actually do any research?
  7. jimmbo

    1990 5.7. 260 Overcooling at idle.

    Wise of Merc to push Closed Cooling on the Engines used in Salt Water, but a lot of Fresh Water is still loaded with Salts(not just NaCl) that will come out of Suspension, Brackish takes it to another Level. Unfortunately a lot of Builders will not choose the Closed Cooling System because of the...
  8. jimmbo

    1957 Johnson 18 hp. FDE-11

    Am exploded diagram typical of those tank
  9. jimmbo

    1979 35hp Johnson - smallest battery?

    I hope that Beefier Transom is attached more Beefierly to the rest of the Hull
  10. jimmbo

    2005 175 Evinrudes

    FICHT isn't an Operator Friendly design. Don't see many of them around anymore. Maybe they are being recycled as Anchors. I had one of them, and even though the Powerhead was replaced by OMC as a Precaution, I got rid of it with 40 hrs on it, and it already had, as the Mechanic said "Neat...
  11. jimmbo

    1990 5.7. 260 Overcooling at idle.

    Perhaps Mercury is putting a Coating on the Water Jackets and Passages, they certainly do in the Intake Manifolds.
  12. jimmbo

    1990 5.7. 260 Overcooling at idle.

    While there isn't as much salt in fresh water, there is still plenty of it and other minerals to come out of Suspension at that temp.
  13. jimmbo

    1990 5.7. 260 Overcooling at idle.

    A 160 is too hot for a Raw Water Cooling System. Usable in a Closed System, but a 180 would be used there
  14. jimmbo

    2021 Mercury 115 Pro XS cavitating

    A pic at that height from behind would be handy, as it looks like your hull has a Setback transom. Height should be easy to adjust as you have a Jackplate
  15. jimmbo

    1996 Evinrude V6 150 (60 deg) Looper Problems

    The concept of the Spark being used to set the Idle Speed, goes over a lot of heads. They are thinking on what they did on cars/trucks to tune them
  16. jimmbo

    1959 Evinrude Fat Boy 50hp

    1/3 the fuel was burned, 1/3 was pushed out the Exhaust, and the last 1/3 was dumped via the Crankcase Purge Valves
  17. jimmbo

    1959 Evinrude Fat Boy 50hp

    Some pics of a Fat 50 I found a few years ago
  18. jimmbo

    Are all 9.9 carbs the same from 93 to 95 to 98

    Find a Site that has the Parts Catalogs, and check each Year
  19. jimmbo

    50hp Mercury 2stroke issues

    Start with a Compression and Spark Test. Spark has to be able to jump a 7/16" gap
  20. jimmbo

    1959 Evinrude Fat Boy 50hp

    Here is a link to a 3rd Party Service Manual(one of the Better ones), it is a PDF, so it can be downloaded. http://www.fiberglassics.com/library/images/9/91/Evinrudeservice003.pdf You might have to resort to using an Inductive Tachometer. If you feel you need one to pick a prop, not to worry...
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