Manuals are resourceful for any user repairing or maintaining their motor. Yamaha 50hp repair manuals are no different. In point of fact, Yamaha 50 horsepower outboard repair manuals are one of the most helpful manuals. They are especially resourceful and helpful when it comes to repairing or maintaining the quality of an outboard motor.
Depending on if it is boats or motorcycles, outboard motors will have an instruction manual on how to repair and maintain these motors with specific instructions, visual diagrams, and safety precautions. This information is essential to maintaining the highest quality of an outboard motor and ensuring user safety. With each manual, there are specific instructions on how to repair or maintain your outboard motor.
Included in these instructions are visual guides, in the form of diagrams or illustrations. There is also information on where to find specific controls. Yamaha 50hp repair manuals are often for the fearless do-it-yourself individuals, who have all the tools to repair an outboard motor. These manuals will have instructions on what materials are needed to replace or repair an outboard motor. In addition, repair manuals will contain information on engine specifications, detailed troubleshooting, wiring specifications by color, and how to dismantle and mantle parts of your outboard motor.
The Yamaha 50 factory service manual is also designed for the do-it-yourself individual, but also for brand technicians who service boats or motorcycles that need repair or maintenance. The factory service manual specifically includes information on the cooling system, engine service, electrical and ignition, safety precautions, visual diagrams, when to schedule and how to do maintenance, as well as other helpful information.
As a safety measure, the owners workshop manual also provides safety instructions. Other information included in this manual are control positions and information on how to fix and diagnose problems. Yamaha 50hp outboard repair manuals have helpful information that is essential for proper management and safety precautions.
Without these manuals, many outboard motor users would find it difficult to repair or maintain their outboard motor.
That is why outboard motor manuals are an essential resource to maintaining the quality of outboard motors. Cooling water inlet If your model was equipped with a portable 5. Page Fuel Joint Basic components tions. Power trim and tilt switch 2. Remote control lever 1.
Fuel joint 3. Neutral interlock trigger 2. Fuel gauge 4. Neutral throttle lever 3. Fuel tank cap 5. Air vent screw 6. Page Neutral Interlock Trigger Basic components 6. Throttle 7. Fully open EMU Neutral interlock trigger To shift out of neutral, first pull the neutral in- terlock trigger up. Fully open 2. Fully closed EMU Tiller handle To change direction, move the tiller handle to the left or right as necessary.
Page Throttle Grip Basic components 1. Throttle indicator 1. When constant speed is desired, tighten the adjuster to maintain the desired throttle set- ting. EMU Engine stop lanyard switch 1. Lanyard 2. Lock plate The lock plate must be attached to the en- gine stop switch for the engine to run. The power trim and tilt switch is located on EMU the side of the bottom engine cowling.
Trim tab Top cowling lock lever s turn type 2. Bolt To remove the engine top cowling, turn the lock lever s and lift off the cowling. When in- EMU Trim rod tilt pin stalling the cowling, check to be sure it fits The position of the trim rod determines the properly in the rubber seal. Engine trouble warning indicator Tachometer 8. Set button This gauge shows the engine speed and has 9. Mode button the following functions. NOTE: The water separator and engine trouble warning indicators only operate when the en- gine is equipped with the appropriate func- tions.
Oil level indicator your boat under different conditions. Adjust the trim angle to the desired setting with the EMU Overheat warning indicator digital power trim and tilt switch. Consult your Yamaha dealer if the problem can- not be located and corrected. If the oil level falls below the lower limit, the warning system will activate.
Page 27 Basic components and finally oil filter clogging. Con- wise the engine could be completely lost sult your Yamaha dealer boat if it accidentally falls off the transom. Page Breaking In Engine Breaking in engine speed. A fast idle in neutral is best. Your new engine requires a period of break- Next 50 minutes: in to allow mating surfaces of moving parts to Do not exceed half throttle approxi- wear in evenly.
Over- Use a gasoline-oil mixture to start heating and serious engine damage can the engine. Start the engine. Leave it idling. Ring Free Fuel Addi- 25 L 6. Fire or explosion could result. This engine uses the Yamaha oil injection system, which provides superior lubrication by ensuring the proper oil ratio for all operat- ZMU ing conditions.
No fuel premixing is needed. Page Starting Engine Operation tank cap, loosen it 2 or 3 turns. Squeeze the primer pump with the outlet end up until you feel it become firm. ZMU If there is a fuel joint on the motor, firmly connect the fuel line to the joint. Page 36 Operation gine stop switch.
Do not attach the lanyard to clothing that could tear loose. NOTE: The start-in-gear protection device prevents the engine from starting except when in neu Page Warming Up Engine Place the throttle grip in the fully closed the lower case or the cooling water pilot position. Consult your Yamaha dealer if the problem cannot be located and corrected.
Move the gear shift lever quickly and Move the gear shift lever quickly and firmly from neutral to reverse. Remote control models Pull up the neutral interlock trigger if equipped and move the remote control lever quickly and firmly from neutral to forward. Page Procedure Operation ping the engine immediately after operating at high speed is not recommended. ZMU Remove the key if the boat will be left unattended. Page Adjusting Trim Angle Operation switch while the boat is moving.
Adjust the outboard motor trim angle using the power trim and tilt switch. Power trim and tilt switch ZMU 1. Make test runs with the trim set to different angles to find the position that works best for your boat and operating conditions. EMU Adjusting boat trim When the boat is on plane, a bow-up attitude results in less drag, greater stability and effi- ciency.
Return the outboard motor to its normal position as soon as the boat is back in deeper water. Cruising in turbid water Yamaha strongly recommends that you use the optional chromium-plated water pump kit not available for some models if you use the outboard motor in turbid or muddy water conditions. Consult your Yamaha Propeller nut: dealer for further details. In addi- fuel system. Page Lubrication Oil Injection Models Seal replacement should be per- follow these preventive measures: formed by an authorized Yamaha dealer Charge batteries in a well-ventilated ar- prior to use.
Grease all grease fittings. For further de- Keep batteries away from fire, sparks, tails, see page Page Cleaning The Outboard Motor Maintenance Fill each cell to the upper level with dis- should be done by your Yamaha dealer or tilled water.
Store the battery on a level surface in a Maintenance, replacement, or repair of cool, dry, well-ventilated place out of di- the emission control devices and sys- rect sunlight. Page Maintenance Chart When operating in salt water, turbid or muddy water, the engine should be flushed with clean water after each use.
Initial Every 50 hours Item Page Checking Fuel System Improper repairs can make the outboard unsafe to operate. Check the fuel lines for leaks, crack, or mal- function. If a problem is found, your Yamaha 1. Spark plug gap dealer or other qualified mechanic should re- 2. Spark plug I. Page Inspecting Fuel Filter If any water is found in the If you have any question about properly fuel, the Yamaha portable fuel tank or doing this procedure, consult your other fuel tanks should be checked and Yamaha dealer.
Page Inspecting Idling Speed If you have difficulty ver- 1. Filter cup ifying the idle speed, or the idle speed re- 2. Filter element quires adjustment, consult a Yamaha dealer 3. Filter housing or other qualified mechanic.
O-ring Verify whether the idle speed is set to Reinstall the filter element in the cup. Severe injury could occur if EMU Checking propeller the outboard motor accidentally falls. Page Removing The Propeller Maintenance the battery cut-off switch if your boat has one.
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