TOHATSU MD 35B2 JET Owner's Manual
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TOHATSU MD 35B2 JET Owner's Manual

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OWNER'S
MANUAL
MD 35B
2
JET
Supplement
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Summary of Contents for TOHATSU MD 35B2 JET

  • Page 1 OWNER'S MANUAL MD 35B Supplement ��������������...
  • Page 2 Copyright © 2010 Tohatsu Corporation. All rights reserved. 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.

  • Page 3: Table Of Contents

    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 ....................6 Steering the Boat..........................6 Mooring The Boat ..........................7 Water Intake Blockage ........................8 Clearing A Lodged Impeller ......................

  • Page 4: General Information

    GENERAL INFORMATION Before Operating Your Outboard Read this manual carefully. Learn the difference in handling characteristics between a jet drive boat and a propeller driven boat. If you have any questions, contact your dealer. STEERING AT LOW SPEEDS Unlike propeller driven boats, the jet drive boat tends to lose steering control as less water is drawn in and expelled.

  • Page 5: Specifications

    - drive jet driven boat. The operator should be aware of this and use caution whenever the engine is running. Specifications Owner’s manual requires the correction. Please replace specification with below specification. MODEL MD 35B2 JET Overall Lengh, in/mm 24.8/630 Overall Width, in/mm 13.6/345 Overall Height, in/mm 42.2/1,072...

  • Page 6: Components

    M25 Jet Drive Components a Top Cowl g Thrust Rod m Shift Lever b Throttle Grip h Water Outlet n Fuel Connecter c Stop Switch Lanyard i Jet Drive Housing o Stop Switch d Reverse Lock lever j Battery Cable p Main Switch e Shift Cable k Reverse Gate...

  • Page 7: Operation

    M25 Jet Drive OPERATION How the Jet Drive Operates A jet driven boat has substantially different handling characteristics compared to a propeller driven boat. It is recommended that the operator adjusts to these characteristics by experimenting in open water at both high and low speeds. The driveshaft driven impeller draws water up through the water intake and then redirects it at a high pressure through the water outlet nozzle to create forward thrust.

  • Page 8: Stopping The Boat In An Emergency

    M25 Jet Drive ������� Avoid injury resulting from contacting the rotating impeller or having hair, clothing, or loose objects drawn into the water intake and wrapping around the impeller shaft. Stay away from the water intake and never insert an object into the water intake or water outlet nozzle when the engine is running.

  • Page 9: Mooring The Boat

    M25 Jet Drive ������� Steering the vessel in a tight turn can result in loss of boat control. In some cases, the boat can spin out or roll over, causing serious injury or death. Avoid steering beyond the capabilities of the vessel, especially at high speeds. �������...

  • Page 10: Water Intake Blockage

    M25 Jet Drive Water Intake Blockage ������� A rotating impeller could cause injury if contact is made with hands, clothing, or tools. 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.

  • Page 11: Lubricating The Driveshaft Bearing

    M25 Jet Drive Lubricating the Driveshaft Bearing Before each use, lubricate the driveshaft bearing. Refer to Maintenance - Lubricating the Driveshaft Bearing. Operating In Freezing Temperatures If there is a chance of ice forming on the water, the jet drive should be raised out of the water and drained completely of water.

  • Page 12: Operating In Salt Water Or Polluted Water

    M25 Jet Drive • Know the waters and area you will be boating; tides, currents, sand bars, rocks, and other hazards. • Check steering for free operation. • Check for debris around the rudder and reverse gate which may jam or hinder operation. •...

  • Page 13: Maintenance

    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”...
  • Page 14 M25 Jet Drive Straighten the bent tabs on the impeller nut retainer and remove the impeller nut. a - Tabs b - Impeller nut 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.

  • Page 15: Worn/Dull Impeller

    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 •...

  • Page 16: Replaceable Jet Drive Shear Key

    M25 Jet Drive As the blades wear, shims located in the stack outside of the impeller can be transferred behind the impeller. This will move the impeller further down into the tapered liner to reduce the clearance. a - Shims b - Clearance between impeller edge and liner Check the impeller clearance by sliding a feeler gauge through the intake grate and measure the clearance between the impeller edge and liner.

  • Page 17: Shift Cable Adjustment

    M25 Jet Drive Shift Cable Adjustment ������� Pressurized water hitting the reverse gate may cause it to engage, causing sudden and unexpected slowing of the boat. This can cause serious injury or death from occupants being thrown within or out of the boat. Adjust the shift link rod to lock the reverse gate, preventing it from interfering with water flow.
  • Page 18 M25 Jet Drive Place roller at bottom of shift cam groove as shown. Incorrect Correct Place the shift lever and shift cam into full forward position. Bring groove A to position B and secure the part. 16 16 16...
  • Page 19 M25 Jet Drive Attach ball end to shift cable, align the hole as shown, and secure the part. The reverse gate should not be able to be forced up towards neutral. Pull on the reverse gate by hand to verify. 17 17 17...

  • Page 20: Corrosion Control Anode

    M25 Jet Drive Corrosion Control Anode An anode helps protect the outboard against galvanic corrosion by sacrificing its metal to be slowly corroded instead of the outboard metals. An anode is located on the water intake housing. An anode requires periodic inspection, especially in salt water which will accelerate the erosion.
  • Page 21 M25 Jet Drive Pull the vent hose off of the grease fitting. Pump in grease through the grease fitting, using the grease gun provided, until excess grease starts to exit the vent hose. Reconnect the vent hose onto the grease fitting after greasing. a - Grease fitting b - Vent hose NOTE : After 30 hours of operation, pump in extra grease to purge out any moisture.

  • Page 22: Troubleshooting

    M25 Jet Drive TROUBLESHOOTING Engine Over-Speed (Excessive RPM) POSSIBLE CAUSES • Outboard mounted too high on the transom. • Worn jet pump impeller or liner. • Incorrect jet pump impeller clearance adjustment. • Tilting the outboard out beyond a vertical position. •...

  • Page 23: Engine Installation

    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.

  • Page 24: Determining The Mounting Height Of The Outboard

    Determining the Mounting Height of the Outboard The following outboard mounting height settings will work good for most applications, however, because of different boat/hull designs, the setting should be rechecked by test running the boat. Refer to Water Testing. • Installing the outboard too high on the transom will allow the water intake to suck in air and cause cavitation.

  • Page 25: Water Testing

    M25 Jet Drive BOATS WITH A FLAT BOTTOM HULL Place (center) the outboard on the boat transom. Set the height of the outboard on the boat transom so that the front edge of the water intake housing is in line with the bottom of the boat as shown. Fasten outboard to the transom at this height.
  • Page 26 M25 Jet Drive If cavitation still exists after lowering the outboard, it may be helpful to seek advice from the boat manufacturer. Another option to further reduce cavitation is a rough water plate. A rough water plate may be helpful in reducing cavitation when running in windy, rough water conditions where air is sucked into the water intake when jumping waves.
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  • Page 28 TOHATSU CORPORATION Address : 5-4, 3-chome, Azusawa, Itabashi-ku, TOKYO, 174-0051 JAPAN Phone : TOKYO (03)3966-3117 FAX : TOKYO (03)3966-2951 URL : www.tohatsu.co.jp OWNER'S MANUAL MD 35B Supplement 003-11095-0 1003-NB0050 Printed in Japan...

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