889610 Mercury ROLLER

Fig. 62-Three Cylinder Delivery Sequence
Fig. 63-Four Cylinder Delivery Sequence
Fig. 64-Six Cylinder Delivery SequenceUse 12SD12 Robert Bosch Calibrating Nozzles, 2500 psi (17.237 kPa)(172 bar) opening pressure. Use JDF-2 Test Oil, or a test oil equivalent to SAE J967A with a 34 to 36 SUS rating with oil at 100°F (38°C).Operate pump clockwise (viewed from drive end) at 500 rpm wide open throttle (WOT) for 10 minutes prior to test.Electric shut-off connected to 12-volt D.C. negative (-) ground power source.See Figs. 62, 63 or 64 for fuel delivery sequence.Find fuel injection specification page for your fuel injection pump. Specification pages are arranged in numerical order by the last four digits of the pump model number (JDB331AL2406).(R3432F900 - RE12266)
Test Sequence and Setting
1. Test Transfer Pump Vacuum (500 rpm) ... 8 in. Hg.(27 kPa) (270 mbar) minimum within 30 seconds2. Adjust Transfer Pump Pressure At 600 rpm ... 40 to 50 psi(276 to 345 kPa) (2.76 to 3.45 bar)At 1000 rpm ... 59 to 69 psi(407 to 476 kPa) (4.07 to 4.76 bar)At 150 rpm ... 13 psi(89.6 kPa) (0.896 bar) minimum3. Adjust Automatic Speed Advance 600 rpm ... 3-1/2° - 4°1000 rpm ... 6-3/4° - 7-1/4°4. Check Back Leakage ... 250 - 450 cc per 100 strokes5. Check Internal (Housing) Pressure At 1000 rpm ... 3.4 to 6.3 psi(24 to 44 kPa) (0.24 to 0.44 bar)6. Check Maximum Fuel Delivery At 1000 rpm ... 59 - 60 cc per 100 strokesMax. variation between cylinders ... 3.5 cc per 1000 strokes at 1000 rpmAt 100 rpm ... 49 cc per 100 strokes minimum7. Check automatic speed advance ... 0.5° maximum STOP bench for at least 10 seconds and energize shut-off valve with 12 volt current.8. Check Fuel Shut-Off Operation 200 rpm) ... 0.6 cc per 200 strokes, maximum average delivery with electric shut-off valve disconnected.9. Check Throttle Operation ... 1 cc per 200 strokes maximum average delivery10. Check Fuel Delivery ... Record average delivery per 1000 stroke at 1250 rpm11. Adjust Governor Cut-Off ... Adjust fast idle stop screw to obtain an average maximum delivery of 10 cc per 1000 strokes; no one cylinder should exceed 13 cc per 1000 strokes12. Check Fuel Delivery ... With throttle lever set as in Step 10, average delivery should not be less than the value recorded in Step 9, minus 2 cc per 1000 strokes at 1250 rpm(JDB331MD2406-AR49904)
Transfer pump vacuum (200 rpm) (minimum) ... 18 in. Hg.(609.5 kPa) (609.5 mbar)Transfer pump pressure (1250 rpm) ... 85 to 95 psi(586 to 655 kPa) (5.9 to 6.5 bar)Automatic speed advance Minimum cranking speed delivery (75 rpm) Volume ... 40 cm3/1000 strokesTransfer pump pressure (minimum) ... 12 psi(84 kPa) (1 bar)Fuel delivery (1250 rpm) Volume ... 63 to 66 cm3/1000 strokesMaximum variation between cylinders ... 3 cm3/1000 strokesFuel delivery (750 rpm) Volume ... 64 to 68 cm3/1000 strokesMaximum variation between cylinders ... 5 cm3/1000 strokesHigh idle (WOT) (1340 rpm) Volume ... 10 to 12 cm3/1000 strokesMaximum variation between cylinders ... 4 cm3/1000 strokesGovernor cut-off (1365 rpm) Volume ... 5 cm3 max/1000 strokesLow idle (400 rpm) Volume ... 10 to 12 cm3/1000 strokesMaximum variation between cylinders ... 4 cm3/1000 strokesCheck shut-off at (200 rpm) Volume ... 3 cm3 max/1000 strokes(JDB435AL2442-AR51747)
Transfer pump vacuum (200 rpm) (minimum) ... 18 in. Hg.(60.95 kPa) (609.5 mbar)Transfer pump pressure (1250 rpm) ... 85 to 90 psi(586 to 621 kPa) (5.9 to 6.2 bar)Automatic speed advance Minimum cranking speed delivery (75 rpm) Volume ... 37 cm3/1000 strokesTransfer pump pressure (minimum) ... 12 psi(83 kPa) (1 bar)Fuel delivery (1250 rpm) Volume ... 60 to 63 cm3/1000 strokesMaximum variation between cylinders ... 5 cm3/1000 strokesFuel delivery (750 rpm) Volume ... 64 to 68 cm3/1000 strokesMaximum variation between cylinders ... 5 cm3/1000 strokesHigh idle (WOT) (1325 rpm) Volume ... 10 to 12 cm3/1000 strokesMaximum variation between cylinders ... 5 cm3/1000 strokesGovernor cut-off (1350 rpm) Volume ... 6 cm3 max/1000 strokesLow idle (400 rpm) Volume ... 10 to 12 cm3/1000 strokesMaximum variation between cylinders ... 5 cm3/1000 strokesCheck shut-off at (200 rpm) Volume ... 3 cm3 max/1000 strokes(JDB635AL2446-AR51568)
Transfer pump vacuum (200 rpm) (minimum) ... 18 in. Hg.(60.95 kPa) (609.5 mbar)Transfer pump pressure (1250 rpm) ... 85 to 90 psi(586 to 621 kPa) (5.9 to 6.2 bar)Automatic speed advance Minimum cranking speed delivery (75 rpm) Volume ... 33 cm3/1000 strokesTransfer pump pressure (minimum) ... 12 psi(83 kPa) (1 bar)Fuel delivery (1250 rpm) Volume ... 59 to 62 cm3/1000 strokesMaximum variation between cylinders ... 3 cm3/1000 strokesFuel delivery (750 rpm) Volume ... 63 to 67 cm3/1000 strokesMaximum variation between cylinders ... 4 cm3/1000 strokesHigh idle (WOT) (1325 rpm) Volume ... 10 to 12 cm3/1000 strokesMaximum variation between cylinders ... 4 cm3/1000 strokesGovernor cut-off (1350 rpm) Volume ... 5 cm3 max/1000 strokesLow idle (400 rpm) Volume ... 10 to 12 cm3/1000 strokesMaximum variation between cylinders ... 4 cm3/1000 strokesCheck shut-off at (200 rpm) Volume ... 3 cm3 max/1000 strokes(JDB331CM2667-AR66282)
Transfer pump vacuum (200 rpm) (minimum) ... 18 in. Hg.(60.95 kPa) (609.5 mbar)Transfer pump pressure (900 rpm) ... 73 to 83 psi(503 to 572 kPa) (5.0 to 5.7 bar)Automatic speed advance Minimum cranking speed delivery (75 rpm) Volume ... 42 cm3/1000 strokesTransfer pump pressure (minimum) ... 12 psi(83 kPa) (1 bar)Fuel delivery (900 rpm) Volume ... 63 to 66 cm3/1000 strokesMaximum variation between cylinders ... 3 cm3/1000 strokesFuel delivery (750 rpm) Volume ... 64 to 68 cm3/1000 strokesMaximum variation between cylinders ... 5 cm3/1000 strokesHigh idle (WOT) (927 rpm) Volume ... 10 to 12 cm3/1000 strokesMaximum variation between cylinders ... 4 cm3/1000 strokesGovernor cut-off (955 rpm) Volume ... 5 cm3 max/1000 strokesLow idle (200 rpm) Volume ... to cm3/1000 strokesMaximum variation between cylinders ... 4 cm3/1000 strokesCheck shut-off at (200 rpm) Volume ... 3 cm3 max/1000 strokes(DM4627MD2684-AR66395)
Transfer pump vacuum (200 rpm) (minimum) ... 18 in. Hg.(60.95 kPa) (609.5 mbar)Transfer pump pressure (1100 rpm) ... 80 to 90 psi(551 to 621 kPa) (5.5 to 6.2 bar)Automatic speed advance Minimum cranking speed delivery (75 rpm) Volume ... 40 cm3/1000 strokesTransfer pump pressure (minimum) ... 10 psi(69 kPa) (1 bar)Fuel delivery (1100 rpm) Volume ... 70 to