fireing problems

[nitro32024]

hi everyone i am new here and could use some help.Last week i tryed to start my 2006 yamaha 115 4 stroke. After it had been sitting up for a month or so.
After a few times trying to start it started and run for about five min. then shut down and then started running rough after refireing.
I check the plugs on it and replaced them. It started again and did the same thing. Now only getting fire out of noumber one plug.Does anyone have any advace befor i start replaceing parts they may not be bad.


Thank You

John

[JONSNELL]

Hi John,

What's your fuel like ? Check your in line filter for water

Cheers Snelly

[99yam40]

If not getting spark then follow the Yamaha service manuals steps for testing ignition system. If you do not have one look around till you find one for your motor,
Here is something to read about testing, but pick up the manual and proper test equipment CDI Electronics Practical Outboard Ignition Troubleshooting

[nitro32024]

this is not a fuel problem ,, getting fuel on all injector \
thanks

[Sequoiha]

this is not a fuel problem ,, getting fuel on all injector \
thanks

You know how many times i have heard that, still could be a fuel issue, just because there is fuel in the rail doesnt mean it is at the right pressure or volume, or even going through the injectors. there are certain diagnostic procedure that need to be done. if you are going to work on your own equipment buy a manual and learn to do it properly.

[rodbolt17]

remember
the F115 is a TCI ignition.
most outboards are ADI.
the F115 fires the coils in pairs.
its called a waste spark system.
thats why I call BS on only 1 wire fireing.
what kind of spark tester are you using?

[nitro32024]

to be very honest with you,, we used a srewdriver in the plug connector a feeing with his fingers

[rodbolt17]

make or buy a spark tester thats has a 7/16ths gap.
both coil ends need the same gap or one may not fire correctly.
1&4 and 2&3 fire simultaneously.