Replacing VRO on J90PLSSE

[angameena]

Hi there,

Does anyone have any diagrams on replacing the VRO with the manual pump for a J90PLSSE. I just bought 2000 Crest Superfish Pontoon 22' with the Johnson 90. I've replaced all fuel,and oil lines. Drained and flushed the carbs. I'd like to mix the oil instead of relying on the VRO. Thank you. I've looked everywhere for some diagrams but cannot seem to find one. It seems simple enough to remove two bolts and add new manual pump and attach hoses. Could it really seem this simple???
Thanks!

 

[HarborRat]

Re: Replacing VRO on J90PLSSE

I've done it on a few Johnson and 'Rude 50hp's and there is no need to buy a new pump. I just capped off the oil lines and fittings and bypassed the wiring for the low oil alarm. Never had a problem.

If your not having a problem with the system I'd recommend just leaving it in...they don't go bad as often as many on the internet would have you believing. Worried?

 

[MaPaHa]

Re: Replacing VRO on J90PLSSE

I've disconnected the vro on both my mid 90's 175 and 150 Johnson without changing the pump. I don't remember all the steps so I'm not going to post the parts I do remember and risk leaving out something important, but I would suggest looking at the Evinrude Johnson page of this site. I know it's been discussed there and you can probably do a search and find it.

Mark

 

[biglurr54]

Re: Replacing VRO on J90PLSSE

I did some extensive research on this. I am a firm believer in not relying on oil injection. Credit where credit is due though, The VRO is a great system that richens the mix at higher rpms under load. Then leans out when idling. In theory if it worked 100% of the time then it is a serious improvement over mixing. But here on earth stuff breaks and fails so pre mix is the only fail safe way to go about getting oil in the gas. This isnt bullet proof either. if one carb spots producing you'll scorch a cylinder or two. No way around that.

You can get manual pumps because the commercial motors didnt have the VRO system. If you get a fuel pump from a commercial model of your motor it will bolt right in. With that said there is no need to get one. Like stated before you can plug the oil line and disconnect the low oil alarm and off you go. In my research i read that you want to Keep oil in the line that you plug. I used a clear tube and plugged it and monitored the oil in it and it has remained there for about 5 years now with no issues. My advice is plug the oil line while its full of oil. Then go buy one of those clear graduated mixing containers from WM. There pricey for what they are but mixing cant be easier.

FYI my motor was a 1989 120 Evinrude.