|
| AQ 145A Repower questions? |
| Author |
Message |
    
Scott Miller
Member
Username: n36511
Post Number: 14
Registered: 07-2007
| | Posted on Friday, June 19, 2009 - 07:40 am: | 
|
I have a houseboat with twin AQ145a engines and 280 outdrives. the outdrives are in great shape but both of the engines are getting a little worse for wear. My question is this: What are my power options for the 280 outdrive and what do i need to keep in mind to keep it somewhat simple. I really want to step up to 6cyl or v8s but will stick with the 4cyls if it means an absurd amount of work.
As usual... thanks for the help!!!!! |
Robert A. Fierro
Advanced Member
Username: sandkicker
Post Number: 612
Registered: 06-2008
| | Posted on Friday, June 19, 2009 - 02:30 pm: |
|
It all depends on what an "absurd amount of work" means to you.
Volvo outdrives have built in reduction gears. There is a different ratio for 4, 6 and 8 cylinder engines. The reduction gears are located in the lowest most portion of the outdrive units.
If the house boat has a displacement hull you can put 1000 hp on the hull and it won't go any faster. |
Scott Miller
Member
Username: n36511
Post Number: 15
Registered: 07-2007
| | Posted on Sunday, June 21, 2009 - 09:13 pm: |
|
Ok.... Guess I need to be more specific. House boat with V8s goes 35mph so no... not just a displacement hull. Are reduction gears the only thing I need to worry about? Was concerned I would have to modify stringers/motor mounts/transom holes for correct angle. If it is just a matter of changing reduction gears, that to me, is not an absurd amount of work.... I was mainly interested in what it would take to keep the 280's with a larger newer engine. |
El Pescador
Senior Member
Username: el_pescador
Post Number: 4521
Registered: 02-2006
| | Posted on Sunday, June 21, 2009 - 09:31 pm: |
|
Probably new gears, new transom shields (around $1500-$3000 each), new exhaust pipes (around $1000 each), new bellhousings ($500 to $1000 each), new exhaust manifolds ($600-$800 per set). Now get hold of your calculator, throw labour in, and do a rough estimate (but please, don't faint).
Every year there are a few people asking what engines can they replace their 4 cylinder VP OHC engines with, and I keep giving them over and over the same answer: if you want to install a bigger engine, get the whole package (engine, exhaust, transom shield, drive, used in good condition); and if you find it is too expensive, stick to what you have. Any alternatives you try will end costing you far more than either of the above two options. |
Scott Miller
Member
Username: n36511
Post Number: 16
Registered: 07-2007
| | Posted on Monday, June 22, 2009 - 06:48 am: |
|
El Pescador,
Thanks.. that is what I was looking for! Assuming that I just wanted to replace with same but want a new engine.... is the vp 3.0 a direct bolt on to my 280? |
El Pescador
Senior Member
Username: el_pescador
Post Number: 4524
Registered: 02-2006
| | Posted on Monday, June 22, 2009 - 12:02 pm: |
|
The VP 3.0 is a Chevy and will not bolt directly to your 280. |
Ricardo E.
Advanced Member
Username: ricardomarine_vp
Post Number: 327
Registered: 03-2009
| | Posted on Monday, June 22, 2009 - 12:04 pm: |
|
There are plently of available parts to create just about any swap that you would want to do in the AQ series drives.
The more labor intensive and expensive items will be transom shield and exhaust replacements and finding two 1.61:1 lower units in good condition.
The shields that you have currently are a Single Exhaust Releif shield...... the later AQ series V-6/V-8 engine exhausts will not work with this.
Well, there is one! And that is the AQ 200B single relief 3" Y pipe that will work with the 4 cylinder transom shield.
Hard to find, and you must then go with 3" exhaust! Barr for example. It is doable! I've done this several times.
Your problem is finding two of each!
Is it worth doing would be the question!
. |
|
|
|
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 |
|
