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  1. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Here is a design thought that would have extensions (wings) either side of the engines to provide better stern access. The Regal OBX is a good example of the design. . In terms of a bracket with such features, it might look something like this. . . I'll just have to see how the dimensions...
  2. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I might add that going stern in and departing with a 15 mph crosswind was a bit challenging. o_O The joystick was well worth it. (y)
  3. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    The overnight marinas in my area have a variety of slip arrangements, but you don't always have the luxury of getting what may be best. Many slip spaces don't have the finger piers; they just have pilings for the bow/mid-ship lines. So, the lines are at mid-ship and the stern. Here is a...
  4. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    New topic . . . Stern access. I've been thinking about boarding/off-boarding access when at a marina slip for overnights. Typically, the boats are positioned 'stern-in' to maximize the available slip space and you get off/on the boat via the swim deck. Adding about 4 feet of bracket and...
  5. tpenfield

    How to winterize closed cooling system engine mercruiser alpha one 4,3 V6

    If you go to Mercruiserparts.com or Perfprotech.com , you can look up your engine by serial number and there should be some information about parts and water flow diagram
  6. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    There are examples of too many engines and I would imagine that transom reinforcement is a significant consideration in those cases. Fiberglass is certainly strong enough, but the actual design is more important. I did read through a conversion of a 38' Fountain where the owner went with 3...
  7. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Thanks, Scott. Looks like the jack plates are about $1,500 per engine. Probably a good thing to have as engine height will be a bit of trial and error (or testing and adjusting as optimists would say :) ). I suspect once I get the engine height where I want it, I will not adjust it...
  8. tpenfield

    How to winterize closed cooling system engine mercruiser alpha one 4,3 V6

    Welcome to iBoats . . . :) It looks like you have a 'half' closed cooling system, which is engine block only. No reason to drain (or flush) the engine block, since that is/(should be) running coolant (i.e. green antifreeze . . . Ethylene Glycol). You should check the strength of the engine...
  9. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Another set of pictures, based on refinements. I've taken some of the center sections of the internal structure pieces out (cut-outs) in order to save some weight. Also found a 3D model of the Suzuki duo-prop outboard. . . . . The bracket will have about 44" of running surface with a...
  10. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    It is beneficial on heavier boats. That is why you see many twin engine boats with the Bravo 3 and the Volvo DX series outdrives. Now it looks like the outboards are getting in the game, since many boats that came with I/O are now going outboards.
  11. tpenfield

    Covid!

    I got Covid once after the initial vaccines. Fairly mild. . . Got it from an extended family 'super spreader' :rolleyes: . Then after the several boosters, I (we) were exposed to another extended family super spreader and neither the Admiral or I got it. The boosters seem to work pretty...
  12. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    I'll probably price-out 3 engine options. Mercury, Yamaha, Suzuki and see how it all compares. In 300 HP options The Merc is a V8, the Yammy and Zuki are V6 In 350 HP options, The Merc is a V10, the Yammy and Zuki are V6 IIRC, The Yammy used to be a V8 in the 350 HP range, but now they have...
  13. tpenfield

    Manifolds (Trying to figure out what I am looking at)

    The 3" should do the trick. I had to do the same on my Formula 330, when I added the extended swim platform.
  14. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    IDK - I did not see any mention of superchargong in their product information
  15. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Owner reviews on the Suzuki 300/350 duo-prop outboards seem to be OK. One thing that jumped out when looking at the spec's is that the 350 has 12:1 compression o_O while the 300 has 10.5:1. So, I guess they are getting power from the compression as the blocks are the same displacement (267 Cu...
  16. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    TNT ? :unsure: sounds explosive . . . Is C4 better?
  17. tpenfield

    Replacement raised numbers

    Often on eBay you can find a dealer that has/sells them.
  18. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    The CoG (center of gravity) is going to move about 9" per my calculations. The LOA is going to be about 35' (vs 33') without engines and about 37' with the engines. I have thought about the trailer . . . There will be a lot more hanging off the back beyond the bunks, but it should be fine. I...
  19. tpenfield

    I/O (Sterndrive) Conversion to Outboards

    Here is an update of the thought process so far, in terms of planning out a conversion to twin outboards. . . My plan is to have the outboard engines beyond the existing swim deck to the point of allowing full-tilt of the outboards and not having to change the swim deck area. Pictorial...
  20. tpenfield

    TD-14 (Hurricane Milton)

    Egmont Channel wind station . . . Looks like gusts were up to 105 mph.
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