225x - has anybody disconnected the oil injection on one of these?

[catfish123]

The flywheel was lightened by Eric Simon when the limiter was raised.

[ChrisCarsonMarine]

I've never been too pleased with auto oil mixers...don't glorify it and call it oil injection...it just "injects" the oil into the fuel.Not only that,but in its own version of mixing it acts pretty much like OMC's VRO(very reluctant oiling)...it adds oil relative to the speed the motor is at...not where it's heading.The oil is added to the VST at 100 to 1,or thereabouts...and after warming up and getting to good water you've got a pint and a half of 100/1 ready to take on the hardest work of the day...coldish motor,full load,minimal oil...and the motor sees the 50/1 mixed when the motor sped up a few minutes later...just before it seizes up.
The 225x is about as hot a steel bore 2.5 there is...anything more powerful 245,260,280 etc... all premix motors,and usually at 32/1,wonder why.
Anyway,the bluing on the journals is from lack of oil in my opinion,and premix motors live much,much longer than those equipped with an oil system that simply creates variable ratio premix,Suzuki and Yamaha do have real oil injection on some of there motors that work well.
Yes,I suppose the computer driven oil pump is a step up from the POS plastic crank gear as far as outright failure goes...but for me the oil delivered is still "too little,too late".Really easy to get around though,if anyone's interested,Chris

[Greg G]

The only modification to this motor was the rev limiter raised to 7300. It has the O ring heads but they have not been touched. It has been pretty reliable. The pistons and rings are clean and free with no carbon build up.

Good piece of data with the limiter being raised up from stock to 7300rpm. Did you ever by chance plug in a laptop with a SCM cartridge and get a full printout of the X motors hours in each RPM range for a little better frame of reference? I can't remember now if the factory WOT for that motor was 6400 or 6800.

[catfish123]

6850 limiter from Mercury

[tux974]

Chris, good post! I have 2 X's here with similar situations and in pieces that will not be going back together!......
For me personally you can not beat the simplicity of the older 225PM. Heck they can even be faster out of the box.....

[Go Time]

Chris, I agree as well, The 225X oiling with the VST does present a "delayed" reaction with respect to proper oil/fuel ratio. They should have put direct intake oil injection like they did on the 300X.
Tux, I'm a 225 PM guy all the way (without the oil injection )

[LongShot]

Chris, good post! I have 2 X's here with similar situations and in pieces that will not be going back together!......
For me personally you can not beat the simplicity of the older 225PM. Heck they can even be faster out of the box.....

tux you have a set of electrics you would rent out???

[194268]

I mix all my non oiling engines at 24:1 and my oiler's I run 50: in the tank. Just don't trust the automatic oiler's. Haven't lost an engine to oiling problems yet....

[PanRonnie]

also a nice one the pressure is regulated inside the VST tank
if air is introduced in the fuel line it will have to go through the injectors instead of a regulator at the top of the rail

[tux974]

tux you have a set of electrics you would rent out???

All electrics are long gone. All I have left are 2 blocks .015, front 1/2 and heads.
I have had one in the works for while to be converted to old style electrics, any day now.....

[LongShot]

also a nice one the pressure is regulated inside the VST tank
if air is introduced in the fuel line it will have to go through the injectors instead of a regulator at the top of the rail

Please expand on that comment. Not sure I follow. Thanks/

[LongShot]

All electrics are long gone. All I have left are 2 blocks .015, front 1/2 and heads.
I have had one in the works for while to be converted to old style electrics, any day now.....

Do you have to change top crank bearing cap? Which one does it take. Everything else is just making electrical plates and such bolt up? Got to use center horn or Laser injection because of throttle/timing arm??

[Steve Pope]

Of all the outboard power heads I have stripped down in my 35 years in the marine business every one that has had an oil issue has toasted the Pistons. You say your Pistons and bores are ok.Have seen similar damage to mains when too much sealer used between crankcase halves, effectively acting as a shim,making the mains loose and pounding out, just like yours.

[powerabout]

What do the wrist pins and rods look like?

[PanRonnie]

Please expand on that comment. Not sure I follow. Thanks/

if you look at the detail picture i posted you see that the regulator is placed just after the fuel exits the high pressure pump
so the main line fuel pressure is regulated by bleeding of fuel there
the rest of the fuel then goes in the main line to the injectors with no place other than the injectors to let air escape

in the old situation the fuel returned from the main line through the regulator in the VST tank where it could mix with new fuel
so air if introduced in the main line has a chance to escape through that route

if this engine is behind a heavy boat with a non ventilating propeller it will take time for the rpm,s to rise enough so,
it has time to consume the idle oil ratio fuel and run on the proper oil/fuel
if you put this engine on a light hull with a ventilating propeller where it can spin up in seconds all the while running idle oil/fuel
well that,s not good!!!!

OMC themselves did not trust the VRO enough to run it that way for high performance boating
and advised to run 1:50 in the tank on top of the VRO even went so far as to advice 1:25 in the tank in a non VRO setup

in short to much oil is better then to little oil