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Old 02-28-2004, 05:54 PM
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Default 1989 Johnson Outboard vro 225 hp

I have the above engine. I have heard that people have bypassed the VRO system and added their own oil tothe gas tank....Two Questions
1) Is this a good idea?
2) If anyone has bypassed the vro system, how did you do it? Thanks Tim
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Old 02-28-2004, 05:56 PM
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Default RE: 1989 Johnson Outboard vro 225 hp

oh no! my captains wheel disappeared again.
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Old 02-28-2004, 05:56 PM
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Default RE: 1989 Johnson Outboard vro 225 hp

oh no! my captains wheel disappeared again.
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Old 02-28-2004, 06:33 PM
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Default RE: 1989 Johnson Outboard vro 225 hp

I have a 1993 Yamaha 225hp that had the oil injection system taken off of. I can't help you in the department of what exactly needs to be done but can tell you that I am happy I did it. I bought my motor from a guy that rebuilds all flavors of outboards and he recommended it to me and showed me a closet full of tanks that he has removed. One of the reasons he recommended it to me was simple, if you go fishing all day and come home you typically idle back into the ramp/boat slip. Well would you rather have a motor sit with 50/1 oil gas ratio or 100/1 oil gas ratio? Sounded simple to me. I normally fill my tank when getting gas so in goes a gallon of oil and 50 gallons of gas. Really not a big deal to me with the premix. On the conversion, I think there is more to it then just sealing a line or two off, because you still have moving parts on the motor that support the VRO system. Hopefully someone will chime in and be able to explain exactly what needs to be done.
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Old 02-28-2004, 07:00 PM
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Default RE: 1989 Johnson Outboard vro 225 hp

Capt Tim:

I'd leave "as is" ... as I did on the '87 Rude 225hp I had and I never had any problems ... was still running "mint" when I sold it in the Spring of 2003. All the motor ever required was plugs seasonally, decarb ala "seafoam" every 50 hours, lower unit/pump service & t-stats every other year, and a tune up/check every 4-5 seasons.

Never failed me once, never blew an electrical component, never broke down ... Yes, a thirsty motor, but IMHO if the early Fichts had that reliabililty, well ... things would be quite different.

That said, see this post by "John from Illinois", on his opinion on "why" VROs really fail ... if they do, click "here" and "there"
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Old 02-28-2004, 07:09 PM
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Default RE: 1989 Johnson Outboard vro 225 hp

I had the oil injection system disabled on my '98 200 Evinrude. It's a PITA pre-mixing in the main tank, but worth piece of mind, I suppose.

The way I handle it, I fill in 12 gallon increments, so I mark 4 lines (cause they're usually impossible to read) on a gallon of oil, but it's not an exact science, and it's also amazingly easy to screw up whatever system you come up with, given a long day on the water, under the hot sun.





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Old 02-28-2004, 07:18 PM
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Default RE: 1989 Johnson Outboard vro 225 hp

Mine is disabled on my 88 90 horse johnson.. I put in 18 gallons at a time so I just add 3 bottles each time.
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Old 02-28-2004, 07:20 PM
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Default RE: 1989 Johnson Outboard vro 225 hp

FWIW a '98 doesn't even have a "VRO" ... it uses an "OMS" unit.

OMS = Oil Metering System ... they've been pretty much bulletproof. But no technology will survive for long if/when "bubba-rized"
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Old 02-28-2004, 08:39 PM
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Default RE: 1989 Johnson Outboard vro 225 hp

FYI:

Here's a page that instructs one on "how to" verify proper operation of a VRO system: click here: .

Regarding OMS's again, from a post on FL Sportsmens board, Dunk says they're "flawless".
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Old 02-29-2004, 10:09 AM
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Default RE: 1989 Johnson Outboard vro 225 hp

Quote:
Reel-Rascals - 2004-02-28 7:20 PM

FWIW a '98 doesn't even have a "VRO" ... it uses an "OMS" unit.

OMS = Oil Metering System ... they've been pretty much bulletproof. But no technology will survive for long if/when "bubba-rized"
Reel?

What's done is done.

The extent of my truly limited knowledge, is that OMC used a couple different injection systems, some were bad, some were good. . The system had been disabled when I got the motor and boat, so I saw no reason to pay to have it put back on, and still don't. As I said, it's kinda a pain, but no matter what I don't worry about the right mix getting to her.

The motor has treated me right, but I also yearn for the day when I'll have a pair of quiet, non-smoking 4-strokes on a larger hull.
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