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Literature and Manuals
Dr. Diesel’s Tech Tips from FoleyEngine.com
We share in writing these Tech Tips and try to do one or two a month. These Tech Tips have evolved over the years but they stay constant in their goal of communicating our knowledge to our customers and our fellow engine pros.
Dr Diesel welcomes your comments and suggestions.
Manufacturers names, symbols and numbers are for reference purposes only and do not imply manufacturing origin.
Tech Tip ## from FoleyEngines.com
Related AEABoats Webpages
Flushing Your Outboard By Don Casey from BoatUS
Heat Exchangers By Don Casey from BoatUS
Installing a Seacock By Don Casey from BoatUS
Raw-Water Strainers By Don Casey from BoatUS
Replacing a Cooling Pump Impeller By Don Casey from BoatUS
What Sealant Do You Need? By Don Casey from BoatUS
Winterizing Your Engine By Don Casey from BoatUS
Zincs By Don Casey from BoatUS
*Book is currently part of our members’ Lending Library. To view the entire book, click on the book’s Title above to go to the book’s AEABoats webpage and then Click the “Library” link.
If you would like to donate a book to our Lending Library, please email Donations@AnchorsAweighAcademy.org to arrange.
Page still under development.
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Main Topic Page Links
BOAT REFITTING & REPAIR
^ Refitters & Repairers by Regions (Shipyards, Boatyards, Riggers, Repair Shops, etc)
^ ^ Refitters & Repairers – United States
^ Boat Repair Schools (Hull, Systems, On-Board Equipment, Propulsion Machinery, etc)
^ Do-It-Yourself Refitting & Repair (Installation, Maintenance, Troubleshooting, Repair, etc)
^ ^ DIY: Fundamentals
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^ ^ ^ DIY: Hull & Deck
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^ ^ ^ DIY: Stabilizers & Trim Plates
^ ^ ^ DIY: Dewatering Devices
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^ ^ ^ DIY: Hull Penetrations & Openings (Thru-Hulls, Scuttles, Skylights, Hatches, etc)
^ ^ ^ DIY: Deck Hardware & Equipment
^ ^ ^ ^ DIY: Ground Tackle (Anchors, Rode, Windlass, etc)
^ ^ ^ ^ DIY: Commercial Fishing Gear
^ ^ ^ DIY: Rigging
^ ^ ^ ^ DIY: Sails
^ ^ DIY: Propulsion Machinery (Control Systems, etc)
^ ^ ^ DIY: Engines (Fuels, Troubleshooting, Repair, Rebuilding vs Repowering, etc)
^ ^ ^ ^ DIY: Engine Mechanical
^ ^ ^ ^ DIY: Engine Lubrication
^ ^ ^ ^ DIY: Engine Fuel
^ ^ ^ ^ DIY: Engine Electrical
^ ^ ^ ^ DIY: Engine Cooling
^ ^ ^ ^ DIY: Engine Exhaust
^ ^ ^ ^ DIY: Engine Mounting
^ ^ ^ DIY: Engine-to-Marine Gear Interfaces (Adapter Plates, Damper Plates, Jackshafts, etc)
^ ^ ^ DIY: Marine Gears (Inboards, Inboard-Outboards, Outboards, Sail Drives, Pods, etc)
^ ^ ^ DIY: Shafting (Shafts, Couplings, CVC Joints, Thrust Bearings, Seals, Cutlass, Struts, etc)
^ ^ ^ DIY: Propellers (Screws, Water Jets, Paddle wheels, etc)
^ ^ DIY: Electrical Systems
^ ^ ^ DIY: Direct Current
^ ^ ^ DIY: Alternating Current
^ ^ ^ DIY: DC to AC Inverters
^ ^ ^ DIY: Auxiliary Generators
^ ^ DIY: Domestic Systems
^ ^ ^ DIY: Cabin Heating & Cooling
^ ^ ^ DIY: Galley Appliances
^ ^ ^ ^ DIY: LPG systems
^ ^ ^ DIY: Water Systems
^ ^ ^ DIY: Trash Disposal
^ ^ ^ DIY: Furnishings (Cabinetry, Coverings, Entertainment, Weather, etc)
^ ^ DIY: Nav & Comm Systems (Charts, Compass, GPS, Radar, Lights, Flares, EPIRB, VHF, etc)
^ ^ DIY: Safety Equipment (PFDs, Firefighting, Alarms, etc)
^ ^ DIY: Personel Equipment (Diving, Fishing, Sailing, Racing, Watersports, etc)
^ ^ DIY: Tenders
^ ^ DIY: Boat Trailers
Types of Engine Cooling Systems
Open System – Raw Water Cooled
Closed System – Fresh Water Cooled with keel cooler
Hybrid Open & Closed System – Fresh Water Cooled with raw water cooled heat exchanger
Hybrid Air Cooled & Closed System – Fresh Water Cooled with air cooled radiator
Troubleshooting Engine Overheating
Draft Resource – Needs development:
The cooling system on most marine engines consists of two sides; the fresh water side holding coolant (e.g. antifreeze) and the raw water side where raw water (e.g. seawater flows). The two sides interface and heat is transferred from the coolant to the raw water inside the heat exchanger. All the components of both systems must be in perfect operational condition for the engine to cool properly. There are several dozen reasons why the engine might overheat. While one of the most common reasons involves a reduction in raw water flow due to external blockage of the raw water intake, there are dozens of other reasons for an engine to overheat. In the fresh water side, Coolant loss due to breaches in one or more of the numerous Gaskets, Seals, Hoses, Castings, Plugs, Tubes (Heat Exchanger, Oil Cooler, Charged Air Cooler), etc., or Pressure Cap must be considered and their involvement determined. A reduction in coolant flow due to an internal restriction, Thermostat or Circulation Pump failure, a broken drive, seized bearings, etc. must also be considered. On the raw water side, raw water pump impeller failure and cam wear and reduction of raw water flow due to intake blockage, Seacock blocked or closed, raw water pump failure, bearings seized, drive failure, etc. Heat transfer issues in the heat exchanger or charged air cooler due to buildups (e.g. minerals, debris, etc.) also need to be checked. I have listed but a few of the more prominent reasons for the engine overheat that will have to be considered in this investigation. a complete teardown of the engine may be the only way to determine the actual cause(s) for the overheat. An engine teardown may also be the only way to determine the actual extent of damage. All others are guesswork and will likely require revision once the work begins.
Jabsco – Trouble Shooting Impeller Damage
Trouble Shooting #1
Trouble Shooting #2
Trouble Shooting #3
Trouble Shooting #4
Trouble Shooting #5
Trouble Shooting #6
More from Jamestown Distributers
Tech Tip ## from FoleyEngines.com
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