User manual TOHATSU MD 35B2 JET SUPPLEMENT

[. . . ] OWNER'S MANUAL MD 35B2 JET Supplement Copyright © 2010 Tohatsu Corporation. No part of this manual may be reproduced or transmitted in any form or by any means without the express written permission of Tohatsu Corporation. Index GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Before Operating Your Outboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 How the Jet Drive Operates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Stopping the Boat in an Emergency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] To avoid injury, keep hands and clothing away from the inlet or outlet of the jetdrive, regardless of whether the boat is in the water. Secure tools and loose items to avoid being struck by projectiles as a result of contact with the rotating impeller, and to prevent damage to the impeller. A large amount of debris being drawn into the water intake may result in a loss of power. Intake suction holding debris against the grate will result in restricted water flow. Shutting the engine off may allow the debris to fall off the intake grate allowing full power to be restored. · Check for debris around the rudder and reverse gate which may jam or hinder operation. · Before launching, examine the jet drive water intake for obstructions which may prevent pumping of water. · Ensure the driveshaft bearing on the jet drive is lubricated. Operating In Salt Water Or Polluted Water If the boat is kept moored in the water, always tilt the outboard so the water intake is completely out of water when not in use. Wash down the outboard exterior and flush out the exhaust outlet of the jet drive with fresh water after each use. When used in salt water more than in fresh water, remove mounting hardware, grease, and reassemble once a year. Failure to do this may result in hardware that is difficult if not impossible to remove at a later date. Operating In Shallow Water The life of the impeller and water intake can be greatly increased by avoiding the intake of sand and gravel. The intake suction will act like a dredge when the water intake comes close to the bottom. It is better to stop the engine and drift up to shore when landing, and to shove off with an oar when leaving. The engine can idle through areas of water less than 61 cm (2 ft. ) deep, but there should be more than 61 cm (2 ft. ) of water under the boat when increasing speed to reach full plane. Once the boat is on plane, the boat speed will prevent the ingestion of gravel and other debris from the bottom. The suction is still present, but the water intake passes too quickly over the bottom to allow debris to be drawn into the water intake. When boating through shallow water areas, choose a course of travel that avoids sharp rocks and other underwater obstacles that could damage the boat. Running the boat through these areas on full plane may be helpful as the boat will be riding higher in the water. If the boat gets stuck on the bottom, immediately stop the engine and move the boat to deeper water. 10 M25 Jet Drive MAINTENANCE Impeller Removal and Installation Rotating the driveshaft may cause the engine to crank over and start. To prevent this type of accidental engine starting and possible serious injury caused from being struck by a rotating impeller, always turn the ignition key or lanyard stop switch to the "OFF" position and remove the spark plug leads from the spark plugs while servicing the impeller. 1. 2. Position the key switch or lanyard stop switch to the "OFF" position. Remove the spark plug leads to prevent the engine from starting. 3. Remove the six screws securing the water intake housing, and remove the water intake housing. 11 M25 Jet Drive 4. Straighten the bent tabs on the impeller nut retainer and remove the impeller nut. b a - Tabs b - Impeller nut a 5. Pull the impeller straight off the shaft. [. . . ] Visually inspecting the purged grease at this time will give an indication of conditions inside the bearing housing. If the grease begins to turn dark or dirty gray, the driveshaft bearing and seals should be inspected and replaced if necessary. Some discoloration of the grease is normal during the break-in period on a new set of seals. 19 M25 Jet Drive TROUBLESHOOTING Engine Over-Speed (Excessive RPM) POSSIBLE CAUSES · Outboard mounted too high on the transom. · Cavitation of the impeller due to rough water or obstruction in the boat hull. [. . . ]