Yamaha VRO

[willy]

Any of you guys running a Yammie two stroker, I got a 150 and after reading what happened again in the repair section debating whether I should start putting oil in the gas instead.
I have not read of anyone with the Yammie having the VRO type system go bad but I am sure they are not immune.
Is it a do it yourselfer to disable the set up on my yammie, I believe it is a 1992

[macojoe]

Yamaha has a much better system then most, but none the less its what killed my Yamaha!!
I tryed to not use it at one point, but kept fouling the plugs at a 50:1 mix?? So I hooked it back up, thats not saying i did it right?

One thing i nwas told by a yamaha guy was to run mix in the spring with the injection also, you will get double oil, but this is ok as the motor dry after sitting all winter, and you can watch the oil level going down in the tank so you know its working after a long winter nap.

That was the first time i did not do it and blew it

cause they mix any were from 100:1 to 50:1 depending on speed, if you do a lot of trolling nthe 50:1 was to rich. So might have to run a different ratio?

sorry this is not a fix but just letting you know what was told to me and what has happened.

Also found this on a site

The oil tank on the engine supplies oil to a pump on the port side of the block. Remove the hose that exits from the pump and plug it. Plug all nipples on the pump. Drain the oil from the tank on the engine and plug all hoses on the tank. Disconnect all electrical to both tanks, and plug all hoses.

I will look through the manual to see if I have left anything out, and post any further info here.


After looking through some manuals, I see that on your engine, there should be an oil line from the pump on the engine to each cylinder separately. In that case, you should plug each line. You could snip the lines a couple of inches from each end and plug the short remaining pieces on the pump and intake manifold.

[spareparts]

the yamaha oil injection does not give as much problem as the mercs and Johnrudes, that doesn't mean they are impervious to failure. AS with anything on an engie, make sure its maintained properly, and when it gets old, investigate which parts tend to fail, replace those parts if its cost effective to do so, if not, yank it off and premix. Investigate using amsoil 100 to 1 if fouling is an issue, Yamahas don't have the spark amperage that mercs adn johnrudes do, so I could understand a plug fouling issue if used with to heavy of a premix

[THEFERMANATOR]

Originally Posted by spareparts

the yamaha oil injection does not give as much problem as the mercs and Johnrudes, that doesn't mean they are impervious to failure. AS with anything on an engie, make sure its maintained properly, and when it gets old, investigate which parts tend to fail, replace those parts if its cost effective to do so, if not, yank it off and premix. Investigate using amsoil 100 to 1 if fouling is an issue, Yamahas don't have the spark amperage that mercs adn johnrudes do, so I could understand a plug fouling issue if used with to heavy of a premix

Most of what he said. I did some research on that 100:1 AMSOIL and didn't like what I found. Make sure and check your hoses on the oil injection system, also make sure that the floats are working in the system as well as the electric pusher pump. MOST of the YAMAHA problems occur from the float switch failing and it won't pump oil up to the engine mounted reservoir or sound the low oil alarm. Also the early YAMAHAS have an update available for the oil pump as they did have some pump failures early on. My MAIN gripe with the YAMAHA system is it uses a remote reservoir and an engine mounted tank, and only an electric pump to move the oil up to the engine tank. As most any mariner knows, electrical and water don't last forever together.

If your going to keep the injection, I would check to see if you have the revised pump, linkage and lines on it, replace the float switch in the engine mounted tank, the lines that run from the boats tank to the engines tank and the electric pump that pushes the oil. This is probably overkill, but YAMAHA parts are EXPENSIVE!! One failure and it could be TOAST! I personally like SUZUKI's oil injection systems from 95+. They mixed the oil directly into the fuel, had an engine mounted oil tank, only one oil pump, and didn't use ANY electrical to work. Most ALL of the other engine manufacturers relied on some sort of electrical system or plastic drive system to work. This is one of the things that would scare me about the newer MERCURY's is the ALL electronic oil injection system.

[willy]

thanks for the info guys, especially Ferm what you came up with, think I am going to keep the system but check the components you are referring to.
Ferm where is the electrical pump and connections for the remote tank you refer to, I don't remember seeing something like that.

[spareparts]

Ferm, its been years since I ran that amsoil, what did you come up with? Ya got me interested.

[THEFERMANATOR]

The question about the AMSOIL SABER 100:1 came up over on SCREAMANDFLY. One guy got ahold of an MDSE list on it and it is just a basic dino oil with a few synthetic additives. They tried to get some info from AMSOIL, but all they got was some smoke and mirrors regarding detonation and oil ratios. And when it comes down to it, AMSOIL simply says you can run it up to 100:1 but for best results follow the manufacturers reccomendations. I'll just stick with my PENNSOIL blend, it's done me right for years in my pre-mix applications.

As for the pump WILLY, it is mounted into the side of the oil tank. It opos into a slot in the side of the bottle. And the float switch is in the engine mounted tank. The YAMAHAS/SUZUKIS use a BRONZE gear on the crank and a stainless drive gear at least, so that area is pretty reliable. The main worry to me is those 15+ year old electrical components that have probably spent there life around saltwater all there lives.

[willy]

Agreed Ferm, thanks, I will check them out this spring opening

[Monkey Butler]

I'm still running the oil injection on my 1986 V6 and start each season like MJ described by running off of a couple of portable tanks of premix first. I figure that this also will help to rule out any fuel problems that may have developed in the built in tank over the winter.

[csvencer]

Posted this in the other thread but figured it fit here too, not Yamaha but interesting.

http://continuouswave.com/whaler/reference/VRO.html

-Svence