|
| O/I drive :-), Installing an outboard... |
| Author |
Message |
    
John Fader (Stephydro)
| | Posted on Wednesday, March 14, 2001 - 07:34 am: | 
|
O/I drive :-), Installing an outboard... inboard
This is a post I placed on the Classic Boat Discussion Group back in Feb. with no response. I am hoping someone of this board *has some experience* and will offer opinions. I am not much interested in "I don't think I would try that" sort of responses unless there is experience to back it up :-)
At this point, this is an exercise in "speculative engineering"; however, I would like to hear of anyone's experience along these lines.
I am considering converting a 1959 Fleetwood moulded ply runabout hull that I own into a step hydroplane with a high humped foredeck, as was sometimes done in the 30s.
I'm working on a novel (?) idea for an engine for it. I'd like to know if anyone's ever seen it done. First, I'm a fan of the Merc inline 6 cyl engines. I own 3 dock bangers now and have had two others in the past.
I am thinking of using a straight 6 as an inboard. At first, I thought of laying one of the dockbangers down and driving the prop shaft directly off the output shaft of the engine, obviating the need for a gearbox. But, I really want more than the 70 hp afforded by this solution, and I didn't want to have to make a water pump system for it.
Next, it occurred that any modern outboard foot has a FNR gearbox in it, so why not get a later 140 hp merc and remove the leg. Now, take a large engine foot, say a 235 hp, and mate it with an adaptor plate,and mount the whole thing vertically... really just a very short outboard engine mounted inboard.
I think that the water pump might not draw, so a lift arrangement still would have to be made. Another possible engineering problem would be cooling the foot, since it is designed to run in a cooling environment, but a water jacket for that shouldn't be any challenge.
Ever seen it done? I'd like to hear your opinion of it. BTW, the reasons for this are light weight and economy :-) If I had a lightweight marine gearbox I'd probably do a straight inboard using an sutomotive-type V8. Still, the challenge of this arrangement is interesting.
Cheers/Don Carron
Rockford TN |
Martin Lunde
| | Posted on Sunday, August 26, 2001 - 05:16 pm: |
|
Don,
This was done in the fifties - by a company named Fogel (or something like that). They called it VIP - Vertical Inboard Power. It rotated to control direction (thus no rudder required), but did not tilt when it hit a log so was thought to be a liability when compared to an outboard.
In doing this you have to make sure that water does not enter the exhaust (the engine block on an outboard is quite a bit above the normal waterling of the boat so water entry is not a problem. Mounting the block low in the hull would allow the easy entry of water up the exhaust manifold of the block.
Perhaps look at Mecury's inboard jet units based upon 2 stroke outboard blocks. Would be good if Mercury used 4 stroke blocks mated with the jets (better mileage, lower emissions and quieter installations). |
|
|
|
Product Categories |
| Engine Parts · By Brand |
| Engine Manuals · By Brand |
| Books |
| General Repair and Maint. |
| Care and Repair |
| · Adhesive and Sealants |
| · Bottom Cleaners |
| · Cleaners Wax and Polish |
| · Mops Brushes and Sponges |
| Covers and Tops |
| · Bimini Tops · Hardware |
| · Cover Accessories |
| · Motor Covers |
| · Universal Boat Covers |
| Electronics |
| · Gauges and Compasses |
| · Mounts and Accessories |
| Electrical |
| · Batteries & Chargers |
| · Battery Accessories |
| · Dockside Electrical |
| · Electrical Terminals |
| · Electrical Wire, Cable |
| · Fuses, Fuse Holders |
| · Switches |
| · Wire Ties, Clips, Tape |
| Fuel Systems |
| · Fuel Tanks |
| · Fittings, Fills, Vents |
| · Hose & Primer Bulbs |
| · Filters, Senders, Caps |
| Hardware |
| · Deck Cabin Hardware |
| · Molding and Rub Rails |
| · Rails and Fittings |
| · Snaps Shackles and Hooks |
| · Windshield Hardware |
| Lighting |
| · Cabin Lights · Light Bulbs |
| · Navigation Light Parts |
| · Navigation Lights |
| · Spotlights · Parts |
| Mooring and Dock |
| · Boat Fenders · Boat Hooks |
| · Buoys and Markers |
| · Deck Cleats · Dock Edging |
| · Dock Parts and De-Icers |
| · Fender Covers and Holders |
| · Keelshield / Toon-Tectors |
| · Ladders and Platforms |
| Prop / Trim /
Transom |
| · Jack Plates, Wedges |
| · Mounting Brackets |
| · Outboard Stands |
| · Trim Tabs, Stablizers |
| · Prop Nuts, Locks, Pins |
| · Propellers · Wrenches |
| Pumps |
| · Aerator Pumps |
| · Bilge Pumps |
| · Drain Plugs and Tubes |
| · Hose · Through Hull Fittings |
| Rope and Cordage |
| · Anchor Line · Dock Line |
| · Fender Line · Bulk Rope |
| · Shock Cord and Bungee |
| Safety Products |
| · Horns Bells and Whistles |
| · Mirrors |
| · Vents Blowers and Hose |
| Sanitation |
| · Fresh Water Pumps |
| · Marine Toilets |
| · Sanitation Chemicals |
| · Sanitation Pumps/Hose |
| · Water/Waste System Parts |
| Seating |
| · Deck Chairs and Tables |
| · Fishing Seats |
| · Lounge Seats |
| · Pontoon Furniture |
| · Seat Bases and Pedestals |
| Steering / Control |
| · Control
Boxes |
| · Control
Cables |
| · Hydraulic
Steering |
| · Mechanical
Steering |
| · Rigging · Steering
Wheels |
| Tools / Shop Supplies |
| · Lubricants & Additives |
| · Motor Flushers |
| · Tools & Test Equipment |
| Trailering |
| · Boat Guides/Motor Support |
| · Hitches Balls Couplers |
| · Rollers Brackets Springs |
| · Tires Wheels and Carriers |
| · Trailer Hubs & Bearings |
| · Trailer Jacks |
| · Trailer Wiring and Lighting |
| · Winches Straps Tie Downs |
| Manufacturer List |
|
