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  1. jimmbo

    Swaping Quadrajet with Edelbrock Marine 1409 on New 5.7 Long Block Need Advice

    This about the only adapter I would consider using, flipped over of course l
  2. jimmbo

    Help me identify Trim Cyl - 50HP Evinrude - 50573B

    Looking the parts diagram; it is a butchered trim system A tilt system was quite a bit different
  3. jimmbo

    electric shift help

    That looks like a control box for 1962 - 1968 electric shifts. Hydro-Electric 55hp not included. As Racer said, the correct control box would have the ignition and choke switches integral to the control box
  4. jimmbo

    Switching from Aluminum to SS

    First Impact with my SS, a RAKER, resulted in a damaged Prop, scratched Skeg, and a bent Prop Shaft. $$$$
  5. jimmbo

    Risk of running a cracked manifold

    Did it look like this?
  6. jimmbo

    Switching from Aluminum to SS

    Cleaver type Props, if that is what you have, are not great props for recreational boating as they are Stern Lifters, That works well on Tunnel/Picklefork racing hulls as it helps keep the boat from flipping over backwards. Since I don't know how the engine is mounted Height wise on your...
  7. jimmbo

    Mercury classic 50 Outboard Reeds?

    Lots of 2 stroke don't have reeds, the carb is mounted directly to the block at a port and the piston opens and closes it. Other use a rotary valve, basically the crankshaft throw or a plate attached tot he crankshaft covers and uncovers a port in the crankcase as the crankshaft rotates Your...
  8. jimmbo

    1980 Johnson 25hp

    A drive pin prop would be used on Pre 1978 engines, and is not usable on the Post 77 engines This is from a 1981 OMC accessory catalog. The props for this engine will resemble the second prop. The part numbers though old, should permit cross referencing to newer props of BRP or 3rd party...
  9. jimmbo

    Spare Tire Mount

    Had to use the spare one day about 18 months ago
  10. jimmbo

    Lightened boat, same speed?

    Holley 650 Spreadbore 0-80552. It's the 4bbl I have. A 350 turning 5000 rpm is not going to use all of that carb, the secondaires when open 50 percent, will be more than enough. It is jetted a bit rich on the secondary side
  11. jimmbo

    Spare prop recommendation?

    Good Luck trying an Adjustable Open End Wrench on this prop. FWIW, Crescent is/was a brand of wrenches
  12. jimmbo

    Evinrude Fisherman circa 1965? E07588

    And in 65 they looked like this, more HP but smaller cover/cowl
  13. jimmbo

    14' Mirrocraft & 20hp Johnson prop selection help.

    In theory the centerline of the propshaft should be perfectly perpendicular to vertical when boat is moving. In reality that doesn't always provide highest top speed. Experimentation will reveal that. Higher trim settings may result in ventilation when engine id turned to steer boat. Higher...
  14. jimmbo

    Good pitch to start with on motor/hull combo?

    In a word NO, the extra blade will kill your top end even more. You say you removed a quantity of wet foam, and did some hull repair. Did you at some point check the hull with a straight edge for Hooks or Rockers? A 1000lb boat with a V6 150 should really haul backside. Even for a tin boat a...
  15. jimmbo

    5.7 Volvo Penta GS Intake, Carb, Heads & Cam

    Look carefully at your intake. If your engine has the vortec heads, it likely came with a 4bbl intake with an adapter for the 2bbl Holley. While the 500cfm(378cfm when flowed like a 4bbl) Holley is a wee bit too small for a 5.7 turning 4800 rpm, it doesn't need much more. A small 4bbl(450 - 500...
  16. jimmbo

    Year-round oil weight for Mercury 50hp fourstroke???

  17. jimmbo

    Prop Pitch

    That is something a lot of people pooh-bah as uncommon. Propshafts bend quite frequently when SS props are used. My SS and Propshaft both were badly wounded on rocks at about 21-22 mph. So much for the much praised Rubber Hub saving the prop
  18. jimmbo

    Gt 150 gt

    Are you referring to the idle reliefs?
  19. jimmbo

    Gear oil questions.

    I was mistaken on the yr Hi-Vis introduced but here is a service bulletin
  20. jimmbo

    Year-round oil weight for Mercury 50hp fourstroke???

    This looks like it it might make you happy, it's not FCW certified, but Wally World has it, and it has thinness and thickness. Personally I wouldn't use it, but...
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