28405 Mercury SCREW, PLUG - MAIN FUEL JET CHANNEL

2. Remove bolts (1) from around the oil pan. Use two people to remove the oil pan. The weight of the oil pan is 27 kg. (60 lb.).Install Oil Pan
1. Put a new gasket into position on the oil pan. Use two people to put the oil pan into position on the engine.2. Install the bolts that hold pan (1) to the cylinder block.Remove Oil Pump
Start By:a. remove oil pan 1. Remove four bolts (1). Remove bolt (3) and washer. Remove oil suction bell (5), bracket (4) and tube (2).2. Remove one bolt and washer that hold tube (8) to oil pump (7). Remove oil pump (7).3. Remove three bolts (6). Remove oil pump (7).Install Oil Pump
1. Put pump (2) into position on the engine block. Install bolts (1).2. Put clean engine oil on the O-ring seals for the bell tube and supply oil tube. Install the suction bell tube and supply oil tube.3. Install two bolts at locations (3) for the suction bell bracket.End By:a. install oil panDisassemble Oil Pump (Serial Nos. 38S1-38S687, 60M1-60M276)
Start By:a. remove oil pump 1. Remove the bolt and washer that hold gear (1) on the pump shaft.2. Remove drive gear (1) with Tool (A). Remove the key from the shaft. Put marks on the pump bodies so they can be assembled in the correct position. 3. Remove retainer (3) for the bypass valve. Remove the spring and bypass valve.4. Remove bolts (4) that hold pump body (2) to the main pump body. Remove the pump body.5. Remove the bearings from pump body (2) with Tool (B). 6. Remove gears (7). Put marks on the gears so they can be assembled in the same position.7. Remove spacer (6) from the main pump body (5). Remove the bearings from spacer (6) with Tool (C).8. Remove the gears from main pump body (5).9. Remove the bearings from the main pump body with Tool (C).Assemble Oil Pump (Serial Nos. 38S1-38S867, 60M1-60M276)
1. Use Tool (A) to install bearings (2) until they are even with the outside surface of the main pump body (1). Install bearings (2) so the junctions in the bearings are 30° 15° from the center line of the bearing bores and toward the oil pump outlet passage as shown.2. Install bearings (3) in the spacer with Tool (A). Install the bearings until they are in position the same distance in from each side of the spacer. Install the bearings with the oil holes in the bearing in alignment with the oil holes in the spacer and the junctions in the bearings in alignment with the cavity in the spacer as shown. 3. Put clean engine oil small gears and bearings before they are assembled in the oil pump. Install the idler and drive gears (5) in the main pump body.4. Install spacer (4) on the gear shafts with the smaller cavity and the oil holes in spacer toward the pump outlet passage as shown. 5. Use Tool (B) to install bearings (6) in the pump body (7) until they are 1.52 0.25 mm (.060 .0010 in) from the inside edge of the bearing bores. Install the bearing so the junctions in the bearings are 30° 15° from the center line of the bearing bores and toward the outlet passage. The outlet passage has a cavity between the bearing bores. 6. Install pump gears (8) on the oil pump shafts in their original position.7. Install pump body (10). Install bypass valve (9), spring (11) and retainer (12).8. Install the key on the shaft. 9. Install gear (13) on the shaft. Install the washer and bolt that hold gear (13) on the shaft. Be sure the pump turns freely after assembly.End By:a. install oil pumpDisassemble Oil Pump (Serial Nos. 38S868-UP, 60M277-UP & all Low Speed Engines)
Start By:a. remove oil pump 1. Remove bolts (1) and cover (2). Remove spacer from cover, then remove spring and plunger from pump bore. There is no spacer in Low