Search results

  1. jimmbo

    Just thought I'd share a nice photo.

    Blotched edit
  2. jimmbo

    CROSSFLOW PERFORMANCE ?'s

    Totally unregulated Charging System, Voltage will climb as the Rpms increase. Only use Wet Cell Batteries that have the provision to check the Electrolyte Level and add Water as needed. Sealed Batteries, and AGM(like Optima) are NOT to be used.
  3. jimmbo

    Tube with 25hp on a 14' tinny

    And as the Day goes by, it takes longer and longer for the Bow to drop
  4. jimmbo

    Converting to carburetor from mpi 350 mag

    You did order the Marine Model?
  5. jimmbo

    Just thought I'd share a nice photo.

    I call this one 'The Boxer'
  6. jimmbo

    Converting to carburetor from mpi 350 mag

    The Q-jet is probably the most sophisticated Carb ever designed. It certainly could make Power, and also could deliver good Economy and Low Emissions. It was produced in 2 sizes, 750 CFM and some made for certain Buick 455's were 800 CFM, the difference being the size of the Primary Venturi
  7. jimmbo

    Converting to carburetor from mpi 350 mag

    A 600 is overkill for a 5.7 going 5000 rpm, as it is using less than 430 CFM. When I have the 2bbl 500cfm Holley on my 5.7, the engine has about 4.5-5 inches of Manifold Vacuum at WOT(4800 rpm), which indicated that the 2bbl(which when tested like a 4bbl, flows about 375 CFM) was a bit...
  8. jimmbo

    Converting to carburetor from mpi 350 mag

    Not the wisest thing to do to the engine, but ...
  9. jimmbo

    Converting to carburetor from mpi 350 mag

    You should always have the engine up to Operating Temp before "Taking Off", One of the best ways to have an engine wear out soon, is to slam the throttles on a cold/warming up engine.
  10. jimmbo

    Just thought I'd share a nice photo.

  11. jimmbo

    1979 115 hp 6 cyl inline 2 cycle timing/carb adjust

    Shows to be a 79, which would be an Inline 6 https://www.autorepairmanuals.biz/page/609774 Service manual for it...
  12. jimmbo

    Suggestions about boat not getting on plane and prop protection

    When I was teenager, could get a 10ft car topper to plane with a 5 1/2, but certainly couldn't plane the 12ft car topper A non-planing hull, aka Displacement Hull, takes very little power to push up to its' critical speed, once there, a 10 fold power increase isn't going to do much, except...
  13. jimmbo

    Need advice for getting boat on plane

    Welcome to iboats I am curious as to what Rpms you are getting at WOT. My thoughts... That forth blade is loading the engine up too much at low rpm, hence the poor Hole Shot. Things that are easy to check: As already mentioned, Compression Are all Cylinders getting a Spark that can jump a...
  14. jimmbo

    I'm just about ready to sink it.

    Unless there is some other itty bitty detail that you haven't mentioned... it sounds like like the Linkage between the Connector, and the Shift Shaft got reassembled wrong.
  15. jimmbo

    RWD Tow Vehicle Launch Issues?

    Welcome to iboats A bit of weight over the Rear Axle, put the Mother in Law in the truck box For Decades RWD was all people towed with, only the past 20 yrs have people felt they need 4WD to tow a 14 ft boat
  16. jimmbo

    How to drop lower unit?

  17. jimmbo

    Just thought I'd share a nice photo.

  18. jimmbo

    26ft trojan What size props should be on my single engine 351 Windsor on a 26 foot Trojan day cruiser I only get 1214 miles an hour I think I should

    Likely 3800-4200 is the WOT range for an Engine of that era
  19. jimmbo

    Merc 4.3

    1.62:1 will work with a 5 liter, but something in the 1.5:1range is better for a 5.7, unless you are in the 23 ft range. At that length, a Big Block should be under consideration
  20. jimmbo

    Merc 4.3

    I am not a fan of the 4.3 as it is a small engine, and a V6 to boot. I find it to be low on Torque, and an Albatross on boats over 16 ft It's main Achilles' Heel is that the Intake manifold, needs to be drained when Winterizing. This is a Procedure that is quite often missed the first time...
Top