MarineEngine.com - Your best connection for marine engines, parts, service, and information. View Cart / Check Out Contact MarineEngine.com Ordering and Shipping Information Free Engine Classifieds Engine Parts Discussion Board Engine Manuals Home / Directory
add bookmark or favorites | email this page
Topics Topics Edit Profile Profile Help/Instructions Help Member List Register  
Search Last 1|3|7 Days Search Search Tree View Tree View  

AQ131A Power Question

Discussion Forum at MarineEngine.com » Volvo Penta Gas » Archive through July 06, 2009 » AQ131A Power Question « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Mitch White
New member
Username: horse_up

Post Number: 1
Registered: 06-2009
Posted on Monday, June 29, 2009 - 08:10 am:   Edit Post Delete Post View Post/Check IP

I have an AQ131A in an 86 Capri 19 foot boat. How fast should I be going, because I can barely squeeze 32MPH out of it. It takes like a minute to get on plane with the outdrive set at the middle notch. It tachs up good. Also, when feathering the throttle it will seem to choke down until it picks up the fuel and then its ok. But it just seems like I should be getting more power and speed than what I am getting. I have new points, cleaned carb, Fuel system cleaned with new filter. Any Ideas?
Top of pagePrevious messageNext messageBottom of page Link to this message

Robert A. Fierro
Advanced Member
Username: sandkicker

Post Number: 646
Registered: 06-2008
Posted on Monday, June 29, 2009 - 10:20 am:   Edit Post Delete Post View Post/Check IP

Re: "tachs up good"...
If by that you mean that it gets to at least 4700 RPM (but not over 5000), then all is OK.
You MAY be able to change the prop and squeek another mph or 2 out of it but that's it.

That engine is a 120HP engine. 30ish is about all you'll get with a 120HP engine on a 19 ft boat (unless the boat hull is flat bottomed which the Capri isn't). It takes a surprising amount of HP to push a boat much over 30.

Also... running a marine engine continuouly at WOT is a recipe for a new engine. Volvo recommends that continuous operating RPM be no more that 300 to 500 below max RPMs. I feel that this is a bit optimistic. For best engine life I'd limit continuous RPMs to 80% of max.
Top of pagePrevious messageNext messageBottom of page Link to this message

J.C.H.
Advanced Member
Username: ruckus3313

Post Number: 104
Registered: 10-2008


Posted on Monday, June 29, 2009 - 10:43 am:   Edit Post Delete Post View Post/Check IP

mitch,

just to give you an idea my aq125a w/270 outdrive on a 17.6 ft boat tops off at 31mph with just me and a full tank. ill get 32mph out of her with a half tank of fuel. my prop is a 14x17 volvo penta p#814632. This older v/p aq engines are not power monsters but I have learned that they are very reliable and are very torquey!!! even with 6 people in my boat i can still turn about 26-27mph.
Top of pagePrevious messageNext messageBottom of page Link to this message

Robert A. Fierro
Advanced Member
Username: sandkicker

Post Number: 647
Registered: 06-2008
Posted on Monday, June 29, 2009 - 11:13 am:   Edit Post Delete Post View Post/Check IP

Further JCH's comment. I used to have an AQ120 on an 18 ft Deep V. Other than a starter and an alternator replacement, the engine was bullet proof. It was also VERY fuel efficient...if run at 75 to 80% of WOT RPMs.
Top of pagePrevious messageNext messageBottom of page Link to this message

J.C.H.
Advanced Member
Username: ruckus3313

Post Number: 105
Registered: 10-2008


Posted on Monday, June 29, 2009 - 02:36 pm:   Edit Post Delete Post View Post/Check IP

robert is correct on this mitch. very reliable and unbelieveable fuel economy. i as well try to keep cruising rpm's in between 4000-4300 rpm.when others are burning 100 dollars worth of fuel i have gone through about 35 dollars worth!!

Administration Administration Log Out Log Out   Previous Page Previous Page Next Page Next Page


Home / Directory | Engine Manuals | Engine Parts | Discussion Board | Free Classifieds | Orders / Shipping | Contact Us | View Cart

About Us | Terms of Use | Privacy Policy
MarineEngine.com, 184 Jones Dr., Brandon, VT 05733 USA
Phone: 802-247-4700 FAX: 802-301-1034 info@marineengine.com
Copyright © 2000 - 2007 by MarineEngine.com, Inc. All rights reserved
   
Traduca
EspanolEspanol
Traduisez
FrancaisFrancais
Traduza
PortuguesePortuguese
Traduca
Italiano
Ubersetzen
Deutschen
  
Sierra Marine Catalog
Seloc Online Manuals
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