Pros & Cons on eliminating Oil Injection unit?

[polarispete]

Hello- Just looking for some info on whether or not to eliminate entirely the oil injection system on my 2005 40 hp Johnson.Seems after reading the forums that theres a lot of problems with these units and seeing I grew up on the old school of mixing the gas and oil, which is no big deal in my portable tanks, that this may be the way to go.Any thoughts on this? Also I was told that adealer has to do this disconnect.Has anyone dones theirs? Thanks in advance.

 

[JB]

Re: Pros & Cons on eliminating Oil Injection unit?

Take a look at the article in Engine FAQs, Pete.

 

[HighTrim]

Re: Pros & Cons on eliminating Oil Injection unit?

....and another article that is worth a read.

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

 

[Dhadley]

Re: Pros & Cons on eliminating Oil Injection unit?

Personally I wouldn't have a 2 stroke without one. But. I don't believe all the old wives tales about the problems either.

 

[tashasdaddy]

Re: Pros & Cons on eliminating Oil Injection unit?

if you have the OMS pump, i would keep it.

 

[Joe Reeves]

Re: Pros & Cons on eliminating Oil Injection unit?

(VRO Changeover Judgement Call)
(J. Reeves)

The VROs first came out in 1984 and have been upgraded quite a few times. In my opinion, back around 1988, they had perfected them but I think that they were upgraded even more since then. As long as the warning system is operating as it should, I feel quite at ease with them.

Some boaters have voiced their thoughts such as "What if that overpriced plastic horn should fail while I'm under way for some reason, and the VRO decides to fail five minutes later?" Obviously that would result in a big problem which really brings their fears into view.

The word "ease" is the key word though. If one has the slightest feeling of being ill at ease with that setup, then they should take the route they feel more at ease with. A judgement call each individual would need to make on their own.

********************
(VRO Pump Conversion To Straight Fuel Pump)
(J. Reeves)

You can convert the VRO pump into a straight fuel pump, eliminating the oil tank and VRO pump warning system, but retain the overheat warning setup (and fuel restriction warning if so equipped) by doing the following:

1 - Cut and plug the oil line at the engine so that the oil side of the VRO pump will not draw air into its system. Trace the wires from the back of the VRO to its rubber plug (electrical plug) and disconnect it.

2 - Trace the two wires from the oil tank to the engine, disconnect those two wires, then remove them and the oil tank.

3 - Mix the 50/1 oil in the proper amount with whatever quantity fuel you have. Disconnect the fuel line at the engine. Pump the fuel primer bulb until fuel exits that hose with the tint of whatever oil you used. Reconnect the fuel hose.

That's it. If you want to test the heat warning system to ease your mind, have the key in the on position, then ground out the tan heat sensor wire that you'll find protruding from the cylinder head. The warning horn should sound off.

 

[Reggie08]

Re: Pros & Cons on eliminating Oil Injection unit?

Will the warning horn still work properly then if one is pre-mixing? I haven't tested mine but I premix so I'm curious. Do you leave the the heat sensor connected to the other tan wire or disconnect then ground the tan wire in the wiring harness? Or vice versa?

 

[Joe Reeves]

Re: Pros & Cons on eliminating Oil Injection unit?

As I've indicated, leave the overheat sensor TAN wires alone, leave the TAN wire attached to the overheat sensors.

Think about it..... you do want the overheat warning to function as normal so leave them as they were.

If you grounded those TAN wires to ground, the horn would sound constantly as that completes the circuit.

 

[Reggie08]

Re: Pros & Cons on eliminating Oil Injection unit?

I have no intention of disconnecting it and leaving it disconnected.

 

[Joe Reeves]

Re: Pros & Cons on eliminating Oil Injection unit?

Reggie..... You stated " Do you leave the the heat sensor connected to the other tan wire or disconnect then ground the tan wire in the wiring harness? Or vice versa?"

That left me with the impression that you were thinking of doing just that. Apparently I read something into that statement that somehow didn't exist? No matter..... Hope you have the answer you were seeking.

 

[BigNiner19]

Re: Pros & Cons on eliminating Oil Injection unit?

Pretty simple to me...

Pros: Use less oil at idle and lower RPM's reducing the possibility of "loading up" and smoking everyone out. Also keeps from having unburned oil drip all over the place after a long day of trolling or idling around.

Cons: There isn't much you can do if it stops working and your under way and dont get the motor turned off in time. Your probably going to fire atleast one cylider up.

To me, its worth it to know my motor is getting oil. I mix 50:1 but I also have an older model (1991) motor and did not want to buy a new VRO pump when it stopped working. Its just peace of mind, and also the smell of 2 stroke oil loading up.

Cory

 

[Reggie08]

Re: Pros & Cons on eliminating Oil Injection unit?

Reggie..... You stated " Do you leave the the heat sensor connected to the other tan wire or disconnect then ground the tan wire in the wiring harness? Or vice versa?"

That left me with the impression that you were thinking of doing just that. Apparently I read something into that statement that somehow didn't exist? No matter..... Hope you have the answer you were seeking.

What I was hoping to determine was the best way to test the horn. You mentioned disconnecting the tan wire from the heat sensor then grounding it. I just needed to make sure I understood the right/best way to test the horn hence "ground the tan wire in the wiring harness? Or vice versa?" (meaning the tan wire pigtail on the heat sensor itself) I think my pea sized brain figured out I need to ground the tan wire coming from the wiring harness to test the horn. I'm not the brightest bulb in the pack sometimes but if I ponder something long enough, I can usually figure it out

 

[Joe Reeves]

Re: Pros & Cons on eliminating Oil Injection unit?

Reggie...... You are correct. Key in ON position, ground the TAN overheat warning sensor wire. horn should sound off as that completes the electrical circuit.

Note that I had no intention of insulting your intelligence in my prior reply. It was just a case of a misunderstood question on my part.

 

[akerco]

Re: Pros & Cons on eliminating Oil Injection unit?

I just ran into the same problem and after research and reading on the oil injection I found it best to replace it instead of remove it. I will tell you I am glad I bit the bullet and replaced it.

 

[Reggie08]

Re: Pros & Cons on eliminating Oil Injection unit?

Reggie...... You are correct. Key in ON position, ground the TAN overheat warning sensor wire. horn should sound off as that completes the electrical circuit.

Note that I had no intention of insulting your intelligence in my prior reply. It was just a case of a misunderstood question on my part.

No worries Joe! Never thought that for a minute