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10-20-2020, 07:43 AM
Replies: 62
Views: 3,774
Posted By Dave51

And FYI if you get your hands on an oscilloscope...

And FYI if you get your hands on an oscilloscope you can analyze those signals as well, i.e. this spark signal (this is from an OX66 Yamaha)(mine, actually):
...
10-20-2020, 04:09 AM
Replies: 62
Views: 3,774
Posted By Dave51

Being able to discern a single cylinder in that...

Being able to discern a single cylinder in that scenario must take a good eye.

At any rate, one would assume it's from carbon something or other.

As BP21 noted, could be an ignition problem....
10-20-2020, 03:12 AM
Replies: 62
Views: 3,774
Posted By Dave51

YDS 1.33 or 2.0. Official stuff: ...

YDS 1.33 or 2.0.

Official stuff:

https://www.simyamaha.com/YAMAHA_DIAGNOSTIC_TOOL_p/candoproyam.htm

Typical knock-off:
...
10-19-2020, 09:20 AM
Replies: 62
Views: 3,774
Posted By Dave51

While the SimYamaha catalog shows 2005 models all...

While the SimYamaha catalog shows 2005 models all having the "D" suffix, other catalogs (Crowley, BoatNets) list 2005 models both with and without "D" suffix. There would seem to be a mix.
...
10-19-2020, 07:25 AM
Replies: 62
Views: 3,774
Posted By Dave51

Not for nothing, but it seems that particular...

Not for nothing, but it seems that particular model calls for a 31 ECU.
10-18-2020, 03:56 AM
Replies: 62
Views: 3,774
Posted By Dave51

What precisely does that mean? Sparks out...

What precisely does that mean?


Sparks out of where? The injector hole? The exhaust (although that would be tough to isolate)? The spark plug hole (although that would be a neat trick)?

IIWM I...
10-17-2020, 03:23 AM
Replies: 10
Views: 273
Posted By Dave51

Also have your multimeter hooked up to the HP...

Also have your multimeter hooked up to the HP fuel pump during this monitoring.

Borrow a spark tester from AutoZone.
10-16-2020, 01:36 PM
Replies: 10
Views: 273
Posted By Dave51

What's the fuel pressure, when it runs good and...

What's the fuel pressure, when it runs good and when this happens?
10-12-2020, 04:51 AM
Replies: 19
Views: 499
Posted By Dave51

Also heat up the bolt from the anode side with a...

Also heat up the bolt from the anode side with a torch in case somebody Loctited the daylights out of it, as Yamaha anodes have a habit of coming apart if you don't put a trick on it.
10-12-2020, 04:39 AM
Replies: 19
Views: 499
Posted By Dave51

Yamaha bolt is a small hex head. There is an...

Yamaha bolt is a small hex head. There is an aftermarket kit that uses an Allen head.

If you attack it from the bottom, be aware that there is a large boss that you're going to have to cut...
10-11-2020, 04:12 AM
Replies: 23
Views: 451
Posted By Dave51

Still poking around, but so far: New...

Still poking around, but so far:

New battery-battery ground cable
New terminals on 3 of 5 positive cables (batteries and switchbox output)
New terminal on battery ground side to engine cable...
10-11-2020, 03:08 AM
Replies: 143
Views: 3,655
Posted By Dave51

Right, and measure when it is bogging down.

Right, and measure when it is bogging down.
10-10-2020, 03:26 PM
Replies: 15
Views: 869
Posted By Dave51

I've done it and it works fine, but soldered them...

I've done it and it works fine, but soldered them to get a nice tape/shrink wrap look.
10-10-2020, 01:17 PM
Replies: 143
Views: 3,655
Posted By Dave51

What's the pressure in front of the mechanical...

What's the pressure in front of the mechanical fuel pump?
10-09-2020, 02:23 AM
Replies: 143
Views: 3,655
Posted By Dave51

Is it still doing it now? Cause according to...

Is it still doing it now?

Cause according to your last post, it seems like now you're starving:
10-09-2020, 02:19 AM
Replies: 143
Views: 3,655
Posted By Dave51

Also clarify this. Was not the mechanical pump an...

Also clarify this. Was not the mechanical pump an OEM pump? And why change it if it was working fine?
10-09-2020, 02:14 AM
Replies: 143
Views: 3,655
Posted By Dave51

Yes. In reviewing the relevant posts (OK, a...

Yes.

In reviewing the relevant posts (OK, a lot of the digression was me) it is not clear to me that flooding was ever the issue, nor was excessive fuel pressure.

Consequently, IIWM I'd be...
10-09-2020, 01:52 AM
Replies: 18
Views: 395
Posted By Dave51

Above image is Ford.

Above image is Ford.
10-02-2020, 04:03 AM
Replies: 3
Views: 245
Posted By Dave51

That's the short story. The long story includes:...

That's the short story. The long story includes:

I am troubleshooting a fuel pressure issue, and despite the sensitivity of Yamaha electrical stuff I don't think that's it. The PO did something...
10-02-2020, 03:31 AM
Replies: 3
Views: 245
Posted By Dave51

An aftermarket pump tends to replace a variety of...

An aftermarket pump tends to replace a variety of applications, including across manufacturers, so you'll probably get a parts bag with a variety of O-rings, studs and intake screens. A pump may...
10-02-2020, 02:45 AM
Replies: 6
Views: 228
Posted By Dave51

Thanks for the follow up!

Thanks for the follow up!
09-30-2020, 06:28 PM
Replies: 9
Views: 195
Posted By Dave51

Hmmm. That HFP-512 is the same one I use in my...

Hmmm. That HFP-512 is the same one I use in my 150. Comes with 3 different strainers.
...
09-30-2020, 06:17 PM
Replies: 9
Views: 195
Posted By Dave51

I think this would be yours: ...

I think this would be yours:
...
09-30-2020, 05:57 PM
Replies: 9
Views: 195
Posted By Dave51

That said, I'm presently running a Quantum...

That said, I'm presently running a Quantum aftermarket for 80 bucks in my OX66 150. It works.
09-30-2020, 05:55 PM
Replies: 9
Views: 195
Posted By Dave51

Need to check the exact model, but it looks like...

Need to check the exact model, but it looks like all the 250s are that price. See

https://www.simyamaha.com/category_s/12913.htm?year=2&model=2165&part-category=503
Showing results 1 to 25 of 401
 


 
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