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  1. jimmbo

    Could I use isolator to charge AGM battery

    When you say Isolator, I am assuming you mean an Isolation Transformer to Isolate the Charger from the Earth Ground?
  2. jimmbo

    Could I use isolator to charge AGM battery

    Looking at the Parts Listing for 2000, it appears there is only one 50hp Evinrude that year. It does show a Rectifier-Regulator. Maybe because it is a Fuel Injected Motor.
  3. jimmbo

    Could I use isolator to charge AGM battery

    Unless it is a Regulated Charging System, and back then, a lot of Outboards had Unregulated Systems, I wouldn't recommend any Battery other than a Flooded Wet Cell.
  4. jimmbo

    Swapping power head units or midsection lower units or swivel transom mounts between Mercury 83 50 HP 4 cylinder and 93 40 HP

    Often the Operator fails to add the Oil or adds the incorrect amount, or fails to adequately mix it...
  5. jimmbo

    Swapping power head units or midsection lower units or swivel transom mounts between Mercury 83 50 HP 4 cylinder and 93 40 HP

    If one cylinder is bad on your Engine, I doubt the Oil System is the Problem. It is not Oil Injection, it is a System where Oil is added to the Gas before it gets to the Carbs, so all Cylinders would be Oil Starved and Damaged Some will Insist that the Oil is Injected into the Gas, so, Oil...
  6. jimmbo

    Swapping power head units or midsection lower units or swivel transom mounts between Mercury 83 50 HP 4 cylinder and 93 40 HP

    The Bolts 7/19, are bolted to the Upper Mounts which are hidden inside the Exhaust Plate Extension, with is between the Block and Driveshaft Housing
  7. jimmbo

    Swapping power head units or midsection lower units or swivel transom mounts between Mercury 83 50 HP 4 cylinder and 93 40 HP

    What about 5 and 9? They appear to have a different shape, so Clearance with the Cowl might become an issue? You have to pull Powerheads to undo the upper Motor Mounts, so 6 of One, 1/2 Dozen the other
  8. jimmbo

    Swapping power head units or midsection lower units or swivel transom mounts between Mercury 83 50 HP 4 cylinder and 93 40 HP

    Have you checked out any Parts Catologs to see if there are any Parts of the Motors that are in Common? https://www.marineengine.com/parts/mercury-outboard/
  9. jimmbo

    Pontoon Repower

    It does say "For Parts, or Not Working" Many engines that are completely pooched, were running fine until then...
  10. jimmbo

    Pontoon Repower

    Not all V6s were FICHT in late 90s, OMC was still making Carb Versions.
  11. jimmbo

    Pontoon Repower

    FICHT was released for the 1997 Model Year, by both Evinrude and Johnson.
  12. jimmbo

    Transom bolt pattern for older (1983) 50HP 4 cyl Mercury with power tilt and trim

    Old? That's an 84 or 85, I consider them Almost New.
  13. jimmbo

    Brake based limited slip differentials

    Brake based Limited Slip Differentials are also known as Traction Control. I will take a LSD over Traction Control any day, though if it took enough of the other LSD I might find Traction Control entertaining... though years from now, a Flashback would be scary
  14. jimmbo

    35hp merc. Carb spring hookup?

    The Parts Diagram don't show any Anchoring Screw/Post for the Loop. Perhaps it was retained by #42? That Screen is not visible in the Pic you provided
  15. jimmbo

    Rebuilt my mercarb, now runs awfully

    The TKS does something to Enrich the Mixture, to speed up a Cold Start. Did that get messed up? https://forums.iboats.com/threads/how-does-tks-work-technically.611153/
  16. jimmbo

    Towing friends boat damage

    It still comes down to the Driver doing the Towing to make sure the Coupling is serviceable and secure before Driving away, as all Liability will rest on him/her
  17. jimmbo

    One last try

    That would be a Saucer. Quite common in the 60s
  18. jimmbo

    1978 Johnson 140hp running rough. Need advice

    Premium Gas has a lower BTU Value per Volume than Regular Gas, plus, it burns slower. Unless the Engine is requires Premium, you can end up less Power and poorer Gas Mileage, plus Higher Operating Costs
  19. jimmbo

    How can I make my Tracker 40 HP faster?

    That is why a lot of us Ask if the Spark will jump a 3/8" or 7/16" Gap. Air is an Insulator, and the Denser it is, the better of an Insulator it is, and the Voltage required to Jump the Gap increases.
  20. jimmbo

    changing from a 2 barrel to a 4 barrel carburetor

    A 22 ft is a lot of Boat for a 4.3. Myself I wouldn't use anything smaller the Big Block in a boat that Size. That said... Tops out at 4200 Rpm. What is the WOT range for your Engine, I mean the WOT range that was Specified for it in 1989? A 4.3 is not going to need a lot of CFMs. At 4200 rpms...
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