Usage:
Normally, marine engine installations are made in surroundings that offer only limited clearance beneath the engine oil pan. This makes it difficult in most cases, and impossible in other cases, to drain the oil by removing the drain plug in the bottom of the engine base.
A hand-operated sump pump, which can be mounted either remotely or on the engine and connected to the sump by means of flexible hoses, provides a method of removing oil from the engine base and/or marine gear, if so equipped.
The earlier pump is a wobble-type pump that will deliver 6 U.S. gpm (22,7 lit/min) when pumped 60 strokes per minute. The later pump is a vane-type which is rated at 10 U.S. gal. (3,8 lit.) per 115 revolutions.
Removal And Installation
Disconnect the lines to the pump from the oil pan and marine gear and the outlet line from the pump. Protect these openings from the entry of dirt or other foreign material by use of caps or plugs such as plug (4) in the pump outlet port.
Remove the four bolts (2) which secure the sump pump (1) to the mounting bracket (3).
Inspect the parts for wear and damage and replace if necessary.
REMOVING THE WOBBLE-TYPE SUMP PUMP
1-Sump pump. 2-Bolts. 3-Mounting bracket. 4-Plug.
Disassembly And Assembly
(4L8232 Pump - Wobble-Type)
Since a pump of the same design is used for a fuel priming pump, refer to the topic, FUEL PRIMING PUMP, for information on disassembly and assembly.
(2N8908 Pump-Vane-Type)
1. Remove six bolts and drive out two tapered head dowels (6) to remove head (3).
2. Carefully lift off the head to avoid damaging the gasket or dropping the internal parts.
PREPARING TO DISASSEMBLE SUMP PUMP
1-Shaft nut. 2-Packing nut. 3-Head. 4-Cylinder.
NOTE: The gaskets are available in three thicknesses .002 in. (0,05 mm), .003 in. (0,08 mm) and .004 in. (0,10 mm). The number of small holes punched in the gaskets indicates the thickness, such as - two holes .002 in. (0,05 mm). At assembly use the proper thickness gasket to give a reasonably tight fit or minimum clearance between rotor (9) and head (3).
3. Remove shaft nut (1) and handle.
4. Remove packing nut (2), shaft (7) and packing (5).
DISASSEMBLE OF SUMP PUMP
1-Shaft nut. 2-Packing nut. 3-Head. 4-Cylinder. 5-Packing. 6-Tapered head dowel. 7-Shaft. 8-Carbon vane. 9-Rotor.