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#1
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so the new system delivers constant 50:1, no matter what the rpm?
whats the advantage over mixing 50:1 in the tank? edit: maybe it delivers the oil downstream of the carbs? not being critical , just wondering 
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#2
10-05-2013, 01:29 PM
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As far as I know, ALL VRO systems vary the oil ratio from idle to running under load. That is the whole point behind the VRO, VARIABLE ratio oiling. Early systems varied the oil and would run 100:1 at idle(which is fine), but they would only go to the 50-75:1 range at mid range RPM's which caused a lot of issues. For awhile they tried running 40:1 to help save some engines, but this was a double edge sword as it ended up with soot build up in the rings from the excess oil. I pre-mix them at 50:1, and rejet accordingly. After jetting they don't smoke much at idle(even extended trolling), and you know the oil is getting to it. Also be VERY watchful with VRO and air leaks in the fuel system. Even a small air leak in the fuel line going to the engine will cause it to over oil DRASTICALLY!
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD  AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 
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#4
10-05-2013, 03:10 PM
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I sincerely wish you all the best w/the VROs...I've had a standing rule since mid 80s...if it ain't covered by a warranty, the VRO's gotta go...and have had numerous OMC techs affirm that a best move...If anybody can stay on top of them, I know you can...but there are many levels on which these systems fail...and I've heard them all...failed alarms, gummed up intakes and on and on...
I REELY hope they don't let ya down, but the numbers aren't in your favor...same goes for Merc auto-oilers, too... How's yer V20 comin' along??...
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'74 V-20/ BF 150 '95 V-21/ BF 150 '84 V-20/ 200 2.4 Merc '87 V-20/'18 F150 Yamaha 
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#5
10-05-2013, 03:34 PM
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VRO= Very Rarely Operates
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#6
10-05-2013, 04:34 PM
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Quote:
__________________
2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664
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#7
10-05-2013, 07:13 PM
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I put a new pump kit in the 120 I had on my Mitchell, it ran for about 5 minutes, then the alarm sounded, I pulled it off and put an old style pump on it and never looked back
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