New to me '96 Evinrude 200, keep the VRO?

[Keyboardman]

Hi guys, I just picked up my first engine with a VRO. I know little about them and have always heard of deleting them for safety's sake. I'd love to keep it for the convenience of no more premixing in cans. I understand certain model engines had an alarm to signal a fault and older models did not and caused a lot of engine failures. How do I find out if this model engine has the alarm on it? Model # E200TXEDR If it doesn't have the alarm would I be better off without it? Thanks.

 

[Chris1956]

The 4 wire VRO Pump (Actually OMS pump P/N 5007420) is the latest and greatest, and is worth keeping activated, IMO. However, I am not sure if your motor has it, but it is likely.

Take a look at the front of the engine, with the air box off. The black pump in the center of the motor is the OMS pump. See if it has the 4 wires in the electrical harness. The wire colors would be tan, black, purple, grey. Black is ground, grey is tach signal, purple is power and tan is the alarm signal for no oil at the pump.

You should get an OEM service manual and test the four alarms to assure they work. If you find out the OMS pump is bad it may be worthwhile to replace it. I find that the OMS pump gives you a consistent, precise fuel mix so the motor runs real well at idle, as well as all other speeds, no matter when you last added gasoline.

If you have the 3 wire OMS Pump, you should be able to replace it with the 4 wire one. You would need to add the 4th wire and likely replace the connector on the wiring harness.

 

[dingbat]

4 wire....alarms require “System Check tachometer

 

[Keyboardman]

Thanks for the replies, the engine came complete with the wiring harness and all the gauges and controls. Looks like there are 4 lights on the tach. No oil, Hot, Check engine and Low oil. Am I assuming correctly that I have the later OMS pump? My limited knowledge is that the OMS pump is a constant oil flow and more reliable? I plan on getting the Factory Service manual, it's only $150! taking off the air box to look at the pump isn't possible, right now with the engine on the crate, I'm limited on what I can do with it till it's hung on the bracket.

 

[dingbat]

taking off the air box to look at the pump isn't possible

No need to remove air box. Fuel pump is in plain sight.

The “old” (VRO) to “new” (OMS) change was in 1993.

continuousWave: Whaler: Reference: VRO Fuel-Oil Mixing

OMC VRO fuel-oil mixing in outboard motors

continuouswave.com

 

[racerone]

Well ----if motor is laying on a pallet it is a bit heavy to stand it up.----If pump is on the bottom is might not be easy to check it out.

 

[Keyboardman]

Yup, bolted to the crate and on a pallet. It dawned on me to look up what part number it calls for at an online parts distributor and it comes back as the 5007420 pump. So if the VRO pump was changed to the newer OMS in '93, then mine being a '96, along with having the Check Engine light on the tach I'm thinking it's a keeper. Thank you guys once again with your help and knowledge. Great group of guys, you've helped me with my old 70 and 75 Stinger before too.

 

[ct1762@gmail.com]

incedentally, check out ebay . Factory manuals have been purchased for $20-$30. who cares if it has a few oil spots

 

[Keyboardman]

incedentally, check out ebay . Factory manuals have been purchased for $20-$30. who cares if it has a few oil spots

Just found one for $50 on that site. Thanks