Question about oil injection Tank

[snookhooked]

I'm getting mixed opinions about the vro oil injection on my 92 Evinrude Spit Fire 150hp. I got the motor without the tank so I bought one. it has the oil injection pump on there so it was easy to hook up but the sensor wire has been the question I was asking about since I can not locate where to hook up since there is no wire to match but here is my question. I have heard that some omc mechanics have told to do away with the oil injection and go back to mixing oil in the gas because they are known to fail. if this is true and would be better to just mix then can you plug the oil side of it up and run it that way or am I going to replace the pump to do this? I dont want to do the wrong thing and loose a motor that I cant replace. this was a lucky deal to have this motor for a new as it is and rebuilt for 1,200 bucks that I had to scape up the money and thankful the guy was willing to work with me on paying for it in payments. Im pulling my hair on whats the right thing to do. please help

 

[tashasdaddy]

Re: Question about oil injection Tank

there are mixed feelings one this subject. personally if it has a VRO, Vro2 pump on it, i go to premix. if it has the OMS pump i use it.

 

[snookhooked]

Re: Question about oil injection Tank

Ok, my question is how would I know the difference? I can give you the model number if that would help? E150ELENC 1992 Evinrude Spit Fire 150hp. it is a OMC motor so I would guess that it would have a OMC pump but not for sure. would there be some type of writing on the pump to tell the difference? right now the oil tank is hooked up but the sensor wires aren't due to I cant find any wires to match them up but I have also mixed oil with the gas to play it on the safe side. the motor is running great and it doesn't smoke like crazy so Im thinking that at least I shouldn't foul any plugs. is any of this making any sense? I'm sure you understand my concerns on making the right decisions. Thanks for the help

 

[tashasdaddy]

Re: Question about oil injection Tank

it has the VRO2 fuel pump.

 

[snookhooked]

Re: Question about oil injection Tank

I was told to plug the oil side line and go to premixing. thats sounds fine to me but I told to put 1 quart to every 20 gallons of fuel. they guy who told me that he did the his boat. my question is the 1 quart to 20 gallons, does that sound right? I here there were 100:1 but I was told that a 50:1 is the right way to go. Im learning but still have questions here and there. Thanks

 

[snookhooked]

Re: Question about oil injection Tank

I didnt hear anything back but getting some good advise as well thru Mako Classic too. thanks for the help heres some pics of the boat and motor.

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[Chris1956]

Re: Question about oil injection Tank

Snook, You need to mix 1 qt TCW-III oil per 12 gallons of gasoline to get a 50::1 mix, which is what you want to run.

 

[kenmyfam]

Re: Question about oil injection Tank

My opinion is that you can not go wrong with premix (as long as you mix correctly)

 

[snookhooked]

Re: Question about oil injection Tank

Hey Chris. your saying that 1qt to every 12 Gallons right. I wonder why I was told 1qt to 20 gallons? maybe the different in what type of 2 cycle oil? you saying TCW-III. is that why? I have a 73 65hp Mercury that I measure by the bottle instructions and never thought about if there was any different in oils. but seeing this is a newer motor and its rebuilt, Im really cautious. right now my tank has some oil in the gas but its mixed thin due to Im running the vro with it till the break in is completed. its a 44 Gal tank and its about 3/4 full. there was some gas in it when bought which was premixed with the older motor that was on it. I have since change the motor to the 150 92 model and I have added 20 gal to it and that brought it up to 3/4. I added 1 qt to it during the adding of the gas. my thinking is that maybe I should run this tank out like it is for now with the vro and when its empty, then I should disconnect the vro and start the premix fresh where I will know the exact amount of fuel is and then I will be 100% sure on the mixing. what do you think? I only added the oil at first to make sure I knew there was oil for lube until I found out if I was going to keep the vro but since talking to so many, I have found out that it would be safer just to stick to premix and drop the tank. in the mean time the extra oil would help on the break in since it needs to be 25:1 during that process. Im not real sure on how much fuel I will use during the 10 hr break in process? open to opinions. Thanks

 

[Chris1956]

Re: Question about oil injection Tank

All TCW-III oil shoulc be mixed at 50::1 for that motor. Some of the direct injection motors use special oil, but since your motor has carbs. 50::1 it should be. Merc used to have some heavy oil that could be mixed at greater(12oz oil::6 gal gas) than 50::1 to achieve the same viscosity, but I had thought that was NLA.

I am a bit concerned that you are planning on using the VRO for a while and then abandoning it. Also the oil mix you are using is concerning. Why not disconnect the VRO now, and raise the oil up to the 24::1 mark. You will burn that whole tank if you cruise for 10 hours break in period. 3/4 of a 44 gal tank is 33 gal. 88 oz of oil will give a 50::1 mix. 176 oz (5.5 Qt) of oil gives a 25::1 mix. Depending on what your break-in plan is I would go with adding 5.5 Qts and burn it up.

 

[seahorse5]

Re: Question about oil injection Tank

This link may help explain the "VRO" system for you

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

 

[snookhooked]

Re: Question about oil injection Tank

Chris, I think I will do what you are saying and bring the mixture to 24:1 and run that tank dry and start a new tank after that at 50:1. just go ahead and remove the VRO completely now. I hope I didnt babble too much but thought it was better if I was telling you what was going on and my plans. I had already put oil in the tank for protection till I found out if It was better with the tank or not? just was in a spot of what to do? I was told to shock it or run sea foam after the break in period to make sure the rings dont stick after so much oil being run through it, so I was going to look for some this weekend so I would have it when I finish this tank and go to normal mixture. Thanks so much for all the help you all have given me.