Outboard Engine BF225A - Shop Manual

Question 1

Engine type

Answer 1

4-stroke, OHC, 6-cylinder

Question 2

Displacement

Answer 2

3471 cc (211.7 cu/in)

Question 3

Bore x Stroke

Answer 3

89 x 93 mm (3.5 x 3.7 in)

Question 4

Compression ratio

Answer 4

9.4:1

Question 5

Cooling system

Answer 5

Forced water circulation by impeller pump with thermostat

Question 6

Ignition system

Answer 6

Full transistorized, battery ignition

Question 7

Timing

Answer 7

10 degrees @ 650 RPM BTDC

Question 8

Fuel supply system

Answer 8

Programmed fuel injection

Question 9

Fuel injection system

Answer 9

Electronic control

Question 10

Fuel injection nozzle

Answer 10

Pintle type

Question 11

Fuel

Answer 11

Unleaded gasoline with an octane rating of 86 or higher

Question 12

Fuel pump

Answer 12

Electric and mechanical plunger type

Question 13

Lubrication system

Answer 13

Pressure lubrication by trochoid pump

Question 14

L/O capacity

Answer 14

7.6 L (8.0 US qt, 6.7 imp qt)

Question 15

Starter system

Answer 15

Electric starter

Question 16

Stopping system

Answer 16

Primary circuit ground

Question 17

Exhaust system

Answer 17

Underwater type

Question 18

Clutch

Answer 18

Dog clutch

Question 19

Gear ratio

Answer 19

0.536 (15/28)

Question 20

Reduction

Answer 20

Spiral bevel

Question 21

Gear case oil capacity

Answer 21

1.17 L (1.24 US qt, 1.03 imp qt)

Question 22

Serial number location

Answer 22

Alternator bracket

Question 23

Base idle speed

Answer 23

570 +/- 30 RPM

Question 24

Trolling speed

Answer 24

650 +/- 50 RPM

Question 25

Idle speed (in neutral)

Answer 25

650 =/- 50 RPM

Question 26

Spark plug gap

Answer 26

1.0 - 1.1

Question 27

Oil type

Answer 27

SAE 10W30

Question 28

Gear case oil type

Answer 28

Marine SAE 90 Hypoid gear oil API Service classification GL-4 or GL-5

Question 29

If water is in the gear case, when draining ___

Answer 29

It will pour water out first, or be emulsified

Question 30

If water in the gear oil is detected ___

Answer 30

Check the gaskets and water seals for damage, and check the torque on the gear case bolts

Question 31

If there are metal particles on the magnet end of the oil drain bolt, ___

Answer 31

Disassemble the gear case assembly and check

Question 32

If the spark plug gap is out of spec ___

Answer 32

Replace, do not adjust

Question 33

Measure plug gap with ___

Answer 33

A wire-type feeler gauge

Question 34

Tighten a new spark plug ___

Answer 34

An additional 1/2 turn

Question 35

Tighten a used spark plug ___

Answer 35

1/8 to 1/4 turn

Question 36

Valve clearance inspection and adjustment must be performed with the engine ___

Answer 36

Cold

Question 37

To do valve clearance, start by turning the crankshaft pulley ___, and align ___

Answer 37

``` Clockwise #1 TDC marks on both side of timing belt driven pulleys with the marks on the timing belt back covers ```

Question 38

Thermostat inspection

Answer 38

Immerse in water, heat the water, and observe thermostat with thermometer (don't let either touch the container), measure lift height

Question 39

Thermostat starts opening

Answer 39

60 degrees C (140 degrees F)

Question 40

Thermostat fully open

Answer 40

70 degrees C (158 degrees F)

Question 41

Thermostat lift height

Answer 41

More than 3.0 mm (0.12 in)

Question 42

Fuel strainer replacement period

Answer 42

2 years or 400 hours

Question 43

To adjust idle speed, first ___

Answer 43

Remove propeller and place in test tank filled with water

Question 44

Adjust idle by ___

Answer 44

Turning the idle adjusting screw

Question 45

After idle adjustment, apply ___ to the entire surface of the idle adjusting screw head

Answer 45

Nippon Paint Uni-pack 200 or equivalent

Question 46

After adjusting idle reset the ___

Answer 46

ECM

Question 47

Timing belt deflection inspection measurement point

Answer 47

Mid point between the left side timing belt driven pulley and the idler pulley B

Question 48

Alternator belt deflection inspection measurement point

Answer 48

The center between the alternator and the crankshaft pulley