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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · 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. If the impeller is tight, use a hammer and a block of wood to rotate the impeller clockwise on the shaft until the keyway is directly above the flat on the shaft. This will free the jammed key and allow removal. 12 M25 Jet Drive Worn/Dull Impeller The intake of gravel through the pump can round off and wear the leading edges of the impeller. Some conditions that could be experienced from a worn/dull impeller are as follows: · Noticeable performance loss, especially on acceleration · Difficulty getting the boat on plane · An increase in engine RPM at wide open throttle IMPORTANT : Do not sharpen or alter the top side lifting angle. Check the impeller blades occasionally for damage. Use a flat file to resharpen the leading edges. [. . . ] · Boat overloaded or load improperly distributed. · Boat bottom is dirty or damaged. 20 M25 Jet Drive ENGINE INSTALLATION Transom height of the boat Outboards with jet drives will be mounted approximately 7 inches higher on the transom than propeller driven outboards. This requires outboards than have a 15 in. shaft length to be installed on boats having a 22 in. [. . . ]