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Boating Skills And Seamanship 1 Copyright 2007 - Coast Guard Auxiliary Association, Inc. Powering Your Boat Chapter 10.

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Presentation on theme: "Boating Skills And Seamanship 1 Copyright 2007 - Coast Guard Auxiliary Association, Inc. Powering Your Boat Chapter 10."— Presentation transcript:

1 Boating Skills And Seamanship 1 Copyright Coast Guard Auxiliary Association, Inc. Powering Your Boat Chapter 10

2 Boating Skills And Seamanship 2 Copyright Coast Guard Auxiliary Association, Inc. Lesson Objectives Types and characteristics of marine engines Two and four stroke engines Operation and care Gasoline selection Battery maintenance

3 Boating Skills And Seamanship 3 Copyright Coast Guard Auxiliary Association, Inc. Lesson Objectives (2) Electrical system Galvanic action Winterizing and commissioning Trouble shooting

4 Boating Skills And Seamanship 4 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Engines (Roger’s slide for clarity) Installation location Inboard Outboard Operating cycle 2 cycle 4 cycle Fuel type Gas Diesel

5 Boating Skills And Seamanship 5 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Propulsion (Roger’s slide for clarity) Outboard: Unit containing engine, shafts, prop located outside & attached to transom Inboard: Engine in boat, shaft through hull, external prop & rudder, prop at angle to water surface, no trim function Traditional uses straight shaft, engine is well forward of transom Tunnel drive V drive moves engine to transom, shaft cut into two and leaves engine going forward, then reverses Inboard/Outboard (I/O): Engine inboard at stern, external drive includes prop parallel to water surface, driven by shafts at 90 degrees. Swivel drive to turn; no rudder Traditional I/O has large transom cut out Tractor or 360 degree swivel, shaft through hull, drive & prop under hull Jet drive: Impeller no prop, pumps water for thrust. Swivel nozzle to turn.

6 Boating Skills And Seamanship 6 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Engines Installation (these are propulsion, not engine) Inboard Inboard/outboard (stern drive) Outboard

7 Boating Skills And Seamanship 7 Copyright Coast Guard Auxiliary Association, Inc. Four-Stroke Two-Stroke IntakeExhaustIntakeExhaust IntakeExhaust IntakeExhaust Intake Port Exhaust Port Types of Marine Engines Operating Cycle Who can recall some of the differences in the two-stroke and four-stroke engines?

8 Boating Skills And Seamanship 8 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Engines Types of fuel used What are the advantages and disadvantages in engines fueled by diesel rather than gasoline?

9 Boating Skills And Seamanship 9 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Engines Risks from fuel Gasoline Diesel

10 Boating Skills And Seamanship 10 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Propulsion Inboard engines Engine in boat, shaft through hull, external prop & rudder, prop at angle to water surface Direct - DriveV - Drive Reprinted with permission from Boatowner ’ s Mechanical and Electrical Manual, Third Edition, by Nigel Calder

11 Boating Skills And Seamanship 11 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Propulsion Jet drives Power Steering

12 Boating Skills And Seamanship 12 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Propulsion Tunnel drives

13 Boating Skills And Seamanship 13 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Propulsion Stern drive Engine inboard at stern, external drive includes prop parallel to water surface, driven by shafts at 90 degrees. Swivel drive to turn; no rudder What are advantages and disadvantages of the stern-drive engine?

14 Boating Skills And Seamanship 14 Copyright Coast Guard Auxiliary Association, Inc. Types of Marine Propulsion Outboard engine Unit containing engine, shafts, prop located outside & attached to transom

15 Boating Skills And Seamanship 15 Copyright Coast Guard Auxiliary Association, Inc. Induction Systems Carburetor Fuel is mixed with air, then passed into the cylinder Backfire may cause flame to come out air intake. Use flame arrester. Fuel injection Fuel injected into cylinder to mix with air Some use flame arrester Diesel injects once cylinder is compressed, triggering ignition

16 Boating Skills And Seamanship 16 Copyright Coast Guard Auxiliary Association, Inc. Ignition Systems Diesel Heat of compression Gasoline Spark from plugs Magneto ignition Ignition breaker point system Electronic

17 Boating Skills And Seamanship 17 Copyright Coast Guard Auxiliary Association, Inc. Cooling Systems Air cooled Water cooled Open System Pumps Sea Water Through Engine Closed or dual system Sea Water Pumped Through Heat Exchanger Fresh Water with Antifreeze Pumped Through Engine & Heat Exchanger Telltale on outboards

18 Boating Skills And Seamanship 18 Copyright Coast Guard Auxiliary Association, Inc. Gasoline Considerations Octane Reformulated Fuel tanks Fuel stability Condensation Filter

19 Boating Skills And Seamanship 19 Copyright Coast Guard Auxiliary Association, Inc. Batteries Charged Switch Running on both = same as one battery Secure

20 Boating Skills And Seamanship 20 Copyright Coast Guard Auxiliary Association, Inc. Maintenance Lubrication Crankcase Bilge pumps Belts Ignition system Zincs Reprinted with permission from Outboard Engines by Edwin R. Sherman

21 Boating Skills And Seamanship 21 Copyright Coast Guard Auxiliary Association, Inc. Winterizing Your Boat Crankcase Transmission Fuel tank Gasoline engine Cooling systems Lower units Ignition system Freshwater system Heads

22 Boating Skills And Seamanship 22 Copyright Coast Guard Auxiliary Association, Inc. Spring Fitting Out Out of the water In the water

23 Boating Skills And Seamanship 23 Copyright Coast Guard Auxiliary Association, Inc. Trouble Shooting Engine won’t turn over Engine won’t start Engine runs rough Engine idles but does not develop full power


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