Feht manual

The Problem Definition is completed by specifying the boundary and for transient problems the initial conditions. These specifications are made by tagging the line, node, or material with a mouse click causing it to flash and then selecting the desired specification from a pull-down menu. Triangular elements of arbitrary size needed in the finite-element analysis are formed automatically. The accuracy of a solution is improved as the number of elements increases.

An automatic mesh command can be used to reduce the mesh size. Calculations are initiated from a pull-down menu. The program first checks to see that all materials are properly discretized and the properties, boundary, and initial conditions are specified.

Any error detected during the checking is marked and described in a separate window at the top of the screen. For transient problems, the computational method Euler or Crank-Nicolson and start, stop and time step are selected from a dialog box; if no errors are detected, the calculations are initiated. A variety of output capabilities are provided. For steady-state problems, the potentials temperature,.

The potential at the cursor position is displayed when the mouse button is depressed. The potential gradients temperature gradient, current density, electrical or magnetic flux density within the materials can be displayed by arrows pointing in the direction of the gradient with the shaft length proportional to the gradient magnitude.

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Elizabeth Howell. Yamaha outboard f50 feht service repair manual sn 1. NOTICE This manual has been prepared by Yamaha primarily for use by Yamaha dealers and their trained mechanics when performing maintenance procedures and repairs to Yamaha equipment. It has been written to suit the needs of persons who have a basic understanding of the mechanical and electrical concepts and procedures inherent in the work, for without such knowledge attempted repairs or service to the equipment could render it unsafe or unfit for use.

Because Yamaha has a policy of continuously improving its products, models may differ in detail from the descriptions and illustrations given in this publication. Use only the latest edition of this manual. Authorized Yamaha dealers are notified periodically of modifications and significant changes in specifications and procedures, and these are incorporated in successive editions of this manual.

Any reprinting or unauthorized use without the written permission of Yamaha Motor Co. Printed in the Netherlands 3. Use the information below as a guide for effective and quality service. Remove the drive shaft assembly and pinion, and then pull out the forward gear. Disassembling the drive shaft 1. Install the pinion nut 1, tighten it finger tight, and then remove the drive shaft bearing 2 using a press.

Disassembling the forward gear 1. Remove the taper roller bearing from the forward gear using a press. Remove the needle bearing from the for- ward gear. Drive shaft holder 4 1: Pinion nut holder 2: Socket adapter 2 3: Bearing inner race attachment 3: S62YK Bearing separator 1: Stopper guide plate 2: Stopper guide stand 3: Bearing puller 4: Bearing puller claw 1 5: S62YK 5 4 3 2 1 6.

Fire prevention Gasoline is highly flammable. Keep gasoline and all flammable products away from heat, sparks, and open flames. Ventilation Gasoline vapor and exhaust gas are heavier than air and extremely poisonous. If inhaled in large quantities they may cause loss of consciousness and death within a short time.

When test running an engine indoors e. Self-protection Protect your eyes by wearing safety glasses or safety goggles during all operations involv- ing drilling and grinding, or when using an air compressor.

Protect your hands and feet by wearing pro- tective gloves and safety shoes when neces- sary. Parts, lubricants, and sealants Use only genuine Yamaha parts, lubricants, and sealants or those recommended by Yamaha, when servicing or repairing the out- board motor. Under normal conditions, the lubricants men- tioned in this manual should not harm or be hazardous to your skin. However, you should follow these precautions to minimize any risk when working with lubricants.

Maintain good standards of personal and industrial hygiene. Change and wash clothing as soon as possible if soiled with lubricants. Avoid contact with skin. Do not, for example, place a soiled rag in your pocket. Wash hands and any other part of the body thoroughly with soap and hot water after contact with a lubricant or lubricant soiled clothing has been made. To protect your skin, apply a protective cream to your hands before working on the outboard motor.

Keep a supply of clean, lint-free cloths for wiping up spills, etc. Good working practices Special service tools Use the recommended special service tools to protect parts from damage. Use the right tool in the right manner—do not improvise. Tightening torques Follow the tightening torque specifications provided throughout the manual.

When tight- ening nuts, bolts, and screws, tighten the large sizes first, and tighten fasteners starting in the center and moving outward. Non-reusable parts Always use new gaskets, seals, O-rings, cot- ter pins, circlips, etc. Select Show Grid from the Display menu. Select Outline from the Draw menu. Since this problem is symmetrical, we only need to analyze one quarter of the furnace.

Note that the X and Y coordinates of the cursor position for the selected unit system and scale are shown in the small window at the upper left, just below the menu bar. Click the mouse to fix a node at the corner.

The first node is shown as a small closed circle. Hold the shift key down to provide a drawing aid for horizontal, vertical, or 45 degree lines.

Now click on the first corner. The outline must begin and end on the same node without crossing any existing lines.

At this point, the outline will flash, indicating that the outlining process is completed and the material within the flashing boundary is selected. At this point, you may wish to exactly locate the node positions since it unlikely that you were able to do so while drawing with the mouse. Click on the node at the upper left of the drawing and then select the Boundary Conditions command in the Specify menu. Note that, as a short cut, you can accomplish the same result by double-clicking the mouse on the node.

The Specify Node Temperature dialog window will appear with edit boxes for the node temperature and for the X and Y coordinates of the node. In this case, we wish to alter the coordinates, not the node temperature. FEHT will not let the node move to a position which causes existing lines to cross, so there is some restriction on the coordinates that you enter.

Repeat this process for all of the other nodes so that they are exactly positioned at the proper locations. After entering the coordinates of all of the nodes, save the file as Example 1.

A material must be selected flashing in order to specify its properties. A material can be selected by clicking the mouse anywhere within it outline; it is automatically selected just after it has been drawn. Select Material Properties from the Specify menu. A property dialog box will appear with default property names listed on the left. Choose the material to be brick by clicking on Building Brick in the list on the left.

You can choose the pattern which will be used to identify the material by holding the mouse button down while the cursor is in the pattern box. A pop-up palette will appear with the possible patterns. The color of the pattern can also be selected in the same manner by clicking in the Color box. The thermal properties of brick are displayed. These properties can be changed to other values. They may also be entered as a function of temperature and position.

Leave the brick properties at their default values. The properties dialog box should now appear like this. Click the OK button and the screen will be redrawn with the pattern you have chosen identifying the material. Next we will set the boundary conditions. Move the cursor to a point near the center of one of these lines and click the button. The line should now be flashing.

Move the cursor to the center of the other line and click. Both lines should now be flashing. Once a boundary is selected flashing , the Boundary Conditions menu item in the Specify menu becomes accessible. Select this menu item to bring up the Boundary Conditions dialog window.

Enter 0 for adiabatic conditions in the Heat Flux box and click the OK button. A check mark will automatically appear in before the word Heat Flux to confirm that you are setting a heat flux boundary condition. The two boundary lines are now shown with bold lines to indicate that the boundary conditions have been specified. The inside and outside walls of the brick are convective boundaries.