Monday, April 20, 2009

Basic troubleshooting for YAMAHA outboard motors (part I)

Basic troubleshooting for YAMAHA outboard motors (part I)



A problem in the fuel, compression, or ignition systems can cause poor starting, loss of power, or other problems. This basic troubleshooting and possible remedies, and covers all Yamaha outboard motors. Therefore some items may not apply to your model. If any more questions, please consult your Yamaha dealer or the experienced service shops.

Starter will not operate.
Q. Is battery capacity weak or low?
A. Check battery condition. Use battery of recommended capacity.

Q. Are battery connections loose or corroded?
A. Tighten battery cables and clean battery terminals.

Q. Is fuse for electric start relay or electric circuit blown?
A. Check for cause of electric overload and repair. Replace fuse with one of correct amperage.

Q. Are starter components faulty?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Is shift lever in gear?
A. Shift to neutral.


Engine will not start (starter operates).
Q. Is fuel tank empty?
A. Fill tank with clean, fresh fuel.

Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged?
A. Clean or replace filter.

Q. Has fuel pump malfunctioned?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Are spark plug(s) fouled or of incorrect type?
A. Inspect spark plug(s). Clean or replace with recommended type.

Q. Are spark plug cap(s) fitted incorrectly?
A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires.

Q. Are ignition parts faulty?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Is engine stop switch lanyard not attached?
A. Attach lanyard.

Q. Are engine inner parts damaged?
A. Have serviced by a Yamaha dealer or the experienced service shop.


Engine idles irregularly or stalls.
Q. Are spark plug(s) fouled or of incorrect type?
A. Inspect spark plug(s). Clean or replace with recommended type.

Q. Is fuel system obstructed?
A. Check for pinched or kinked fuel line or other obstructions in fuel system.

Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged?
A. Clean or replace filter.

Q. Have ignition parts failed?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Has warning system activated?
A. Find and correct cause of warning.

Q. Is spark plug gap incorrect?
A. Inspect and adjust as specified.

Q. Is ignition wiring damaged or poorly connected?
A. Check wires for wear or breaks. Tighten all loose connections. Replace worn or broken wires.

Q. Is specified engine oil not being used?
A. Check and replace oil as specified.

Q. Is thermostat faulty or clogged?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Are carburetor adjustments incorrect?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Is fuel pump damaged?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Is air vent screw on fuel tank closed?
A. Open air vent screw.

Q. Is choke knob pulled out?
A. Return to home position.

Q. Is motor angle too high?
A. Return to normal operating position.

Q. Is carburetor clogged?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Is fuel joint connection incorrect?
A. Connect correctly.

Q. Is throttle valve adjustment incorrect?
A. Have serviced by a Yamaha dealer or the experienced service shop.

Q. Is battery cable disconnected?
A. Connect securely.

11 comments:

  1. motor starts fine and runs grate but wont run over 2200 rpm

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  2. it like it runs out of fuel over 2200 rpms 2 new fuel pumps new cant rember the name but it go from 6 volts to 12 volts 4 the fuel pump witch is elic. inj. motor 150 2000

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  3. I keep blowing the 30 amp fuse. The fist time it blew I blew when i tried to start it. I replaced the fuse and it ran for about 10 minutes and abruptly quit. I replaced the fuse and it ran for another 10 minutes and abruptly stopped. I blew another fuse. These fuses are under the cowling behind a plastic cover and inside a fuse block there are two fuses in small holder. There are two holders. When it blows it will not start nor will it tilt.

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  4. motor worked fine all summer long I ran it hard for about a mile and now it starts to shake

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  5. Ive got a 150 four stroke outboard 2012 motor, the hand control buzzer goes off when idoling in neutral only. Can anyone tell me what this means pls.

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  6. My 15 hp Yamaha starts after 2 pulls, runs great, but stops running at low RPM, or "idle speed". It has new spark plugs,fuel filter, fresh oil change including the oil filter. It is a 2001 model and rarely used until I bought it.

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  7. Heya¡­my very first comment on your site. ,I have been reading your blog for a while and thought I would completely pop in and drop a friendly note. . It is great stuff indeed. I also wanted to ask..is there a way to subscribe to your site via email?


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  8. I have a Yamaha 200 outboard when I turn key to start I hear sound from engine compartment like it is receiving fire however starter will not turn over.

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  9. I have gas coming from the exhaust while priming fuel line

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  10. Hello, i am working on 97 yahama wave runner ||| 650. I can't find anywhere on the routing of the fuel line's. Where do they go connected from the main, reserved to the carburetor. Its cranking over but no start.

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