Whaler Central - Boston Whaler Boat Information and Photos

Posted by Harvey Boysen on 05/28/14 - 6:32 PM

I have a "new" 1995 Montauk 17 that I want to restore. It's not in bad shape but I want it like new.
It has a 1995 90hp V4 Evinrude 60 in excellent condition
I would like to convert from VRO to premix to gain more space in the center console.
Any reason other than the inconvenience that I shouldn't do that???
Thanks
Harvey

Posted by Joe Kriz on 05/28/14 - 6:45 PM

The only thing I can think of at this time is the motor will always run with too much oil except at the higher RPM's.
This can foul plugs and blow extra smoke at times out the exhaust.

VRO cuts down on the use of oil at slower speeds. Less then the 50:1
Thus Variable Ratio Oil-Injection (VRO)

Posted by wannabe on 05/29/14 - 3:50 AM

There have been many reasons stated in the past for getting rid of VRO, but making more room in the console is a new one to me. Not a lot of room under there.

Posted by tedious on 05/29/14 - 4:51 AM

I just want to see the 60 horse V4!

More seriously, if you're going to pre-mix, won't you have to carry a jug of oil which will take nearly as much space as the VRO tank? Also, when you remove the VRO, I think you'll have to disconnect some of the alarm circuits, won't you? Don't know if in so doing you be silencing other alarms (like overtemp) that you really do want to hear.

Posted by todd12 on 05/29/14 - 8:47 AM

I have done it for the same reason you are stating. I have a 1996 115 johnson ( old style block ) on my current montauk. I did not want the extra tank in the boat. I just carry one or two extra pint bottles of oil if needed. I believe there are two electrical connections to be undone ( If memory serves me correct there is one at the vro pump and one from the oil tank. then plug / cap the oil line. There are many you tube videos that show this also. Good luck

Edited by todd12 on 05/29/14 - 8:53 AM

Posted by edmaude on 05/29/14 - 4:23 PM

Harvey,

You can also run the standard fuel pump that came on the SPL88 motors and remove the VRO system entirely. I did that on my old boat and it is easy. The downside it like Joe mentions extra smoke and potential plug fouling if you troll a lot. I happen to have one of these standard fuel pumps on hand now that I could sell for 20 bucks if you like. It if from the 1983 V4 motor that my outrage came with

Ed

Posted by Harvey Boysen on 05/29/14 - 7:42 PM

Tedious-sorry I wasn't clear. It's a 90hp V4 60 degree. Great motor and light.
Ed-are you certain it will work on my motor? New/used? How do I contact you or how can you contact me?
I'm not sure what we can put in these posts. I'm happy to put my phone # or email address if it is allowed.
Thanks
Harvey

Posted by Joe Kriz on 05/29/14 - 8:19 PM

Harvey, all you need to do is click on his name and that brings up his entire profile.
All the Whalers he has listed, all the posts, his email address if he doesn't have it hidden, and many more things.
Click on his name or anyone else's to find out more info about that member.

Edited by Joe Kriz on 05/29/14 - 8:20 PM

Posted by Weatherly on 05/31/14 - 6:39 AM

#10

In technical terms, your 1995 OMC 90 HP does not have the often maligned OMC VRO system. You have the Oil Management System (OMS), a successor to VRO and VRO2. The OMS pump which replaced the VRO2 in 1992, has a variable oil ratio, but it only changes from about 75:1 at idle to 50:1 at speed. The factory called it a 60:1 pump as that was the average.

Simply put, if you convert to a fuel pump only premix (which is easily done on the 1995 motor) You lose the benefits of oil metering at different operating RPM's.

I personally prefer to maintain the OMS system, if the motor is so equipped. I have both a 2003 J90 with OMS pump and an 1995 E90SPL 50:1 premix. An OMS pump can be easily rebuilt with new diaphrams at low cost by any competent DIY mechanic.

If you convert to premix, consider using the XD50 synthetic blend oil.

Edited by Weatherly on 05/31/14 - 7:46 AM

Posted by Harvey Boysen on 06/02/14 - 6:55 PM

#11

Weatherly
Thank you.
I'm not concerned about the reliability of the system. I really want the center console to be more useable.
I've always used Quicksilver Premium in my Merc 90. I know they also make a synthetic but I didn't think it made a significant difference in smaller motor.
Is it significantly better for a motor as small as a 90?
Thanks
Harvey

Posted by gchuba on 06/02/14 - 7:36 PM

#12

I had a 2 stroke and went with some high end oil mix that was a higher ratio than how the motor was "broken in" with (a chain saw, not an outboard). Cooked the motor. I would prefer fouled plugs than a motor replacement. Stick with the ratio's and mixes that were designated for the motor by the manufacturer.

Garris