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  

Converting a 4-236 Perkins to Keel Co...

Discussion Forum at MarineEngine.com » Perkins » Converting a 4-236 Perkins to Keel Cooling « Previous Next »

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

Fred Deacon
New member
Username: big_h_buck

Post Number: 1
Registered: 01-2008
Posted on Thursday, January 31, 2008 - 02:14 pm:   Edit Post Delete Post View Post/Check IP

Hi Everyone

I am a new member today, but have been reading the material on this site for quite some time. There is a wealth of information here. --- Thank you all for sharing your knowledge.

My plan is to convert my 4-236 from fresh-water cooling to a Keel-Cooling system, using 11/5" galvanized pipe attached to the keel of my 37 steel trawler.
I am also converting to dry-stack-exhaust to eliminate the need to draw fresh water.
Would someone be able to help me with redirecting
the water lines on this engine.
I have not been able to find plumbing drawings for
this project anywhere.
This engine currently has a fresh water intake and a heat exchanger.
Fresh water NOT good for c-c-cold weather, or Salt Water. And I am worried about Zebra Mussels and other Stuff clogging my intake.

thank-you in advance,for you help.
Top of pagePrevious messageNext messageBottom of page Link to this message

Doug Siddens
New member
Username: dsiddens

Post Number: 2
Registered: 07-2008
Posted on Thursday, July 24, 2008 - 06:24 pm:   Edit Post Delete Post View Post/Check IP

Fred, when you say fresh water are you saying that you operate your boat in fresh water? When you say fresh water is not good for c-c-cold weather what symptoms does you engine exhibit in c-c-cold weather? Do you have separate water jacketed exhaust manifold with separate header tank (at the front of the engine) or do you have the combination header tank/exhaust manifold?

What follows is my description based on my separate jacket exhaust plus separate header tank configuration:

If you do put in keel cooling I think you will want to trace the path of the engine's coolant flow. Start at the engine coolant water pump (probably pointing to port unless your engine is facing aft) This will go to one or two heat exchangers. From there it will return to the inside of the engine, probably at the header tank. You will notice that the outside cooling water has hosing/tubing that goes from the outside coolant pump (below the injector pump) to the heat exchanger(s). After leaving the exchanger(s) the plumbing path will come forward to enter the forward end of the jacketed exhaust manifold. It will exit the exhaust manifold a the aft, top. The plumbing circuit will now send it to the water/exhaust injection point and back outside with the exhaust gases. My boat has a stack that rises about four feet and then turns down 180* to exit out the side. At the downturn side of the turn is my water(sea) injection point.

So... you'd be replacing that portion of the circuit that involves the heat exchanger(s). In all of this I would be cautious to determine, amongst other factors, flow rates and friction losses and heat transfer figures. If you go with totally dry stack I presume you will have it blanketed for heat and noise.


disclaimer: I'm not a professional mechanic or know-it-all. Just guy who does the best he can with what he's got. I make mistakes. Sometimes I get it more or less right.

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
Only registered users may post messages here. Registration is FREE and easy, click on the REGISTER link at the top of the page. Thanks.
Password:
Options: Automatically activate URLs in message
Action:

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