lmo2001-001b.fm Page 57 Wednesday, May 24, 2000 2:15 PM
SPECIAL PROCEDURE Engine Overheating CAUTION: If the monitoring beeper continuously sounds, stop engine(s) immediately. Perform the Jet Pump Water Intake and Impeller Cleaning procedure in this section. Flush cooling system, refer to POSTOPERATION CARE. If engine(s) still overheat, refer to an authorized dealer for servicing.
Jet Pump Water Intake and Impeller Cleaning
WARNING Keep away from intake grate while engine is on. Items such as long hair, loose clothing or personal flotation device straps can become entangled in moving parts resulting in severe injury or drowning. Weeds, shells or debris can get caught on the intake grate(s), drive shaft(s) and/or impeller(s). A clogged water intake may cause troubles such as: 1. Cavitation: Engine speed is high but sport boat moves slowly due to reduced jet thrust; jet pump components may be damaged. 2. Overheating: Since the jet pump operation controls the flow of water to cool the engine, a clogged intake will cause the engine to overheat and damage engine internal components. The clogged area can be cleaned as follows:
In-water cleaning: Pull safety lanyard to stop engine(s). Let the boat stop by itself then pull the weedless system lever (refer to POST OPERATION CARE). This will lower the water intake grate(s). Wait a while to allow weeds or other debris to escape from grate(s). Thereafter, fully push wheedless system lever and start engine(s). It may be necessary to repeat the procedure. CAUTION: Operating the sport boat with the water intake grate(s) in lower position will cause damage to the weedless system. In severe conditions if the above method does not work, the following can be performed: – With engine(s) running, put shift lever in reverse position and vary throttle(s) quickly several times. – Retry boat. Most of the time, debris will escape from the propulsion system. Out of water cleaning: If the system is still clogged, shut off the engine(s) by removing the safety lanyard.
WARNING Always remove safety lanyard from switch to prevent accidental engine starting before cleaning the jet pump area. Pull the weedless system lever to lower the water intake grate(s). From underneath boat, manually clean each water intake area. If the system is still clogged, refer to an authorized dealer for servicing. CAUTION: Avoid sport boat operation in weeded areas. If unavoidable, vary sport boat speed. Weeds tend to entangle more at steady and slow speeds. Inspect water intake grate(s) for damage. Refer to an authorized dealer for repair as necessary. 57
