JABSCO 18940-0010 Installation And Operation

ENGINE COOLING
SELF-PRIMING PUMP
FEATURES
Body: Bronze
Bearing Housing: Bronze
Impeller: Jabsco Neoprene Compound
Shaft: Stainless Steel
Shaft Seal: Carbon-Ceramic Face Type
Bearings: Sealed Ball Bearing
Ports: 1-1/4" ID Hose
Pulley: 6-1/2" Full Grip "A" Belt
Weight: 7 lb (3.2 kg)
INSTALLATION AND OPERATION
The pump may be mounted in any position. The direction
of rotation of the pump determines the location of the
intake and discharge ports (refer to dimensional
drawings). Before installing, rotate the pump shaft in the
direction of the normal operating rotation of the engines
on which the pump will be mounted. The mounting
bracket used to support the pump must be designed to
enable adjustment of the pump position for proper drive
belt tension.
Attach the pump to the mounting bracket using 3/8" –16
hex head screws. The pump mounting holes are tapped
to this thread size.
Put Pulley drive belt over both the drive pulley and the
pump pulley. An "A" section pulley belt should be sufficient
to drive the 18940-0010 pump. Position the pump to
allow 1/2" deflection of the drive belt midway between
the engine and pump pulleys. Secure the pump mounting
brackets. Attach 1-1/4"ID hose to the ports and clamp
using two stainless steel band clamps per port (be sure
to attach the water intake line to the proper pump port).
Be sure that all suction lines are airtight so that the pump
will self-prime. Start the engine and run at low speed.
This pump depends on the water for lubrication. DO NOT
RUN DRY for more than 30 seconds. Lack of water will
damage the impeller. This pump is designed for liquids
between 45° and 180°F. Pumping colder water will short-
en impeller life.
Cooling system should be designed so the cooling pump
operates with a maximum of 15 psi output pressure.
Model 18940-0010
WINTERIZING
Drain the pump by loosening the impeller housing bolts
and loosening the housing. Flush cooling system with an
ethylene glycol base antifreeze. NOTICE: Do not use a
petroleum based rust inhibitor in the pump. Pump
damage can result.
APPLICATIONS
• Marine engine cooling
• Replaces Sherwood model G-5 for Chrysler engines
LM 318, LM 340, LM 360, LM 383, LM 400, LM 440
• Lehman 302, 351 C.I.
• Powerhouse Marine 302, 351 C.I.
* Average engine cooling applications have discharge
pressures of 10-15 psi (69-104 kPa) and intake
vacuums of 3-5 inches of mercury (76-127 mmHg).