F225txrd oil pressure alarm test - done!

[fairdeal]

thank you Rodbolt & Boscoe

I finally satisfied my curiousity and succeeded in "faking" the oil pressure alarm



So, recap:

I wanted to do it "out of the water" while running on muffs

(well, actually double muffs tee'd with the garden hose flusher)



First I learned the F225 doesn't mind having the oil pressure sensor disconnected - at idle.


Then I learned, wiring in the prescribed 220 ohm resistance on a 3 wire "potentiometer" type sensor was going to be a PITA.


Then, Rodbolt suggested: connect the harness to a "spare" sensor which was actually seeing no pressure.

Great idea - except I do not have a second sensor - only the working one on the engine.

Aha - no problem - I will _remove_ the sensor - and plug the threaded hole !

OK - remove the sensor !


(had to make a special wrench to grab metal hex base of sender -

did not want to risk applying torque to bakelite housing)



aha - next challenge ! - sending unit is straight thread !

"similar to" - but NOT - 1/8" NPTapered.


No 1/8" NPStraight plugs to be found in the parts stash....

BUT - we do have a F90 nearby!

with an oil pressure switch - same threads.



So - F90 switch gets borrowed to plug hole in F225,

F225 sensor dangles from harness,

engine is started, alarm (very quickly) sounds.


Thanks again, gents.




Special tool for removing F225 oil pressure sending unit:

[boscoe99]

Great job.

Send rodnut your cell number. He might need to call you for some consultation when he runs across a problem he cannot solve.

Might be sensor related.

Trivia for you. Do you see the numbers/letters at the top of the warning page? Above Engine 1?

Now take a look at the part number of an F225TXR ECU

69J-8591A-30-00 YAMAHA ENGINE CONTROL UNIT ASSY

[fairdeal]

Trivia for you. Do you see the numbers/letters at the top of the warning page? Above Engine 1?

Now take a look at the part number of an F225TXR ECU

Aha - "sharp eyes" - very sharp eyes!

here's the ECU that was on my engine when japan shipped it:



However - and this motor is labeled "Manufactured 11/04" -

the harness has the "Command Link" connector -


so eventually I found on eBay a -31 ECM "pull" at a great price

and swapped it out.

[boscoe99]

I was wondering how you had a -31 ECU. Now I know.

[rodbolt17]

to much work making that tool.
I simply locked a wrench in the vise, cooked it a bit with heat and bent it to a 90*.
but as long as it works .