yamaha 60hp outboard motor 2 stroke

[steve hopeng]

Hi everyone,

I just bought a Yamaha 60hp, 2 stroke engine, 2003 model (60FETO), the engine was being repaired, it needed a new CDI unit as according to the person i bought it with it was damaged, i have already done that but there's too much loose wires and parts with the engine, they did not do a proper job, i need a wiring diagram and if possible a set-up diagram of the engine so that i know where everything goes.

please can anyone help

[boscoe99]

http://www.yamahapubs.com/index.do?pg=search&category=4

Do a search for a 2003 two stroke 60TLRB.

[steve hopeng]

ok, i got the diagram,
my problem now is the 2nd cylinder does not work, the spark plug does not spark
the person i bought it from said it is the CDI unit so i changed it to a new one, but the problem is still there.

can anyone help?

[throrope]

The good news is you don't have spark on only one. While these are bullet proof, a 12 year old motor could have any problem. I suggest swapping plug then ignition coil & wire with another cylinder and see if a that cylinder sparks.

[steve hopeng]

yes, have tried that and it sparks.. have swapped the coil on the second cylinder to the other 2 and it sparks, i have also swapped the second with the 2 others and it does not spark... it is the wire that comes from the cdi unit for the 2nd cylinder that is not doing its job but it cannot be the cdi unit as it is new, any idea?

is it possible that there is a timing issue here, or is there any delay on the engine that makes the 2nd cylinder runs after some time???

[boscoe99]

Has the wire that runs from the CDI to the coil been tested for continuity and for a short to the block?

If the coils/plugs check good and a new CDI is presumed to be good, that is what I would check next. Either an open wire or a wire that is shorted to ground will cause the coil to not do its job.

[steve hopeng]

not done this test yet, will try that tomorrow and get back, thank you

[steve hopeng]

but the thing is the coil is doing its job, when you connect the 1st or 3rd wire that comes from the cdi unit to the 2nd coil it does spark, so it cannot be the coil, it is the 2nd wire that comes from the cdi unit that does not bring power to any cylinder....

the test was done according to the electrical guy and there is no power to any cylinder using the 2nd wire from the CDI, now i have the supposedly faulty cdi that does not provide power from the 2nd wire and also the new cdi that have the same problem.... is it possible that the new cdi is still faulty too?

[boscoe99]

I am talking about the wire from the CDI to the number two coil. Not the coil itself, which is known to be good. Voltage has to get from the CDI to the number two coil via the number two coil wire for the number two coil to do its job.

If a wire is open, then no voltage will get to a perfectly good coil. The coil will not induce voltage in a plug.

If a wire is shorted to ground, then no voltage will get to a perfectly good coil. The coil will not induce voltage in a plug.

The chances of a CDI going bad is extremely low. The chances of a new CDI going bad in the exact same manner as an existing CDI, is extremely, extremely improbable. It can happen but the odds are about the same as me winning the Power Ball lottery.

[steve hopeng]

ha ha, cool, so i would say that my CDI is perfect then... will bring all the answers to the electrical guy tomorrow and see what happens, will get back to you...

thanks again

[boscoe99]

Here is what I am trying to explain, in a graphical manner. This is for a four cylinder Yamaha but the principal is the same. No current flow to a coil and that coil is not going to fire a spark plug.

An open or a short in the wire could be at any point between the CDI output terminal and the coil input terminal.

[steve hopeng]

amazing, thank you, will work on it tomorrow and see how it goes...

[steve hopeng]

hi again,

all tests carried out and still no results, we have just been thru the manual and it seems that this is a timing issue, in the manual there's a retard and advance switch on the CDI unit and it is con*****ed by the throttle sensor. dont know yet if this is the answer to our problem unless we try it out tomorrow... what do you think????

[99yam40]

it would be best if you give some info as to why you think this is a timing issue from your testing.
My 1999 C40 cold starts/ cranks up with a different idle timing than listed for idle timing in manual, changes after motor warms up and other things.
so what timing readings did you get and when that led you to this ??

[boscoe99]

What is the complete serial number for the motor?

Something is not adding up.