Yamaha 225HP engine
 

Hey guys!
I know this is more of a bike forum but since the forum is and a I quote "all Yamaha's technical / mechanical / repair / preparation questions" I got a little(hopefully) problem with my outboard engine..

I hope someone can help me as I've also helped several of our comrades over here in these last few years so here it goes....


I was working today on my 2002 LF225TRXA Yamaha outboard because I could not put it in gear.
First thing I did was test the cables and they were good.
The sliding mechanism was completely stuck and wouldn't move so I suspected the gear shaft that goes from the bottom end to the bottom of the engine block was somewhat corroded so I turned off the battery switch and unbolted the black plastic frame, behind the two air filters, which holds several electrical components so I could get some space to lubricate gear shaft properly and also disconnected 3 ground cables so I could have that little bit of space and but still it was stuck.

After that I connected the ground wires and connected the battery so I could raise the bottom end and remove it.
I figured out that my yamaha mechanic didn't properly align the gear shaft on the bottom end and that was the culprit of my issue because I could now move the engage/Neutral/disengage lever very easily.

I then refitted the bottom end and lowered the engine so I could arrange all the cables up top on their proper places but I forgot to disconnect the battery switch and when I was bolting the 3 ground cables I had a small very spark (a short)..

Now I have no spark and my engine won't turn on but before it was idling perfectly (but just wouldn't go into gear)..

What tests should I do to find out what is damaged?
I was really hoping to finally but my boat in the water and go fishing..

Thanks in advance!
Vando

you must have a fuse box. Check it

I'd already done that but I've only been able to find 6 fuses but on the parts microfiche there are 7fuses but i just am unable to find it :|

well, the 6 fuses I've found are good and so is the Stator...
I'll be checking the ignition coils and rectifiers tomorrow morning but I have to find out the wiring diagram for the rectifiers so I can find out if one of them is the problem..

This diagram shows 9 fuses in total, 7 small and 2 big ones(the main fuse and isolator fuse).
Page 97
http://yamahaoutboards.com/sites/def...26-09-96_2.pdf

Bob

Hey!
Well, that manual isn't properly the same as my engine..at least not for the year in question...

In sum, there was a guy here today that came with the YDS (yamaha diagnostics system)..

At first the program didn't let him do any tests because it kept saying the engine was not in Neutral..
We tried a new 703 control box but error was still there...
We found another switch under the R/N/F sliding mechanism and with a screwdriver we were able to press it.
After this he could some testing.
We were able to test 2 ignition coils at a time with the YDS software and all 6 had spark!
Tested both fuel pumps and they passed the tests.

But still the engine won't start with the key.. it turns but there isn't spark on any of the sparkplugs.

We suspect it is the pulser coil that is not working.

How do I test it properly?
I tried resistance testing between B & W/B, B & W/G, B & W/R and had infinity.
Tried between W/B & W/G, W/B & W/R and got around 1005 ohms (just over 1Kohms)... manual says it should be between 400ish and 500ish.

Could that little spark I mentioned have burnt the pulser coil?