1997 70hp oil injection question

[joelybob]

I have a 1997 70hp evinrude with a remote oil injection my question is should I leave it injected or should I premix it. I bought motor in the late fall so I only muff tested it when I bought it. if it is a remote injection is that a vro or is that something different. how reliable is the injection system on this motor.

 

[boobie]

Re: 1997 70hp oil injection question

I know I'll get some heat about this, but if it was my mtr I'd disconnect the oil side of the vro and use it for a fuel pump only. Then just make sure you mix your fuel 50:1. That way you know you're getting the proper fuel/oil mix.

 

[joelybob]

Re: 1997 70hp oil injection question

Thanks for your response. I didn't know that there could be problems with this system till i got looking around in the forums. I have a nice after market gauge that warns for low oil-
no oil. dont know how reliable it is. sometimes knowing some stuff isnt good lol. makes me second guess myself.

 

[Chris1956]

Re: 1997 70hp oil injection question

That OMS system is a very good one. I would give it the alarm test from the OEM Service manual, and if it passes, run it.

 

[Home Cookin']

Re: 1997 70hp oil injection question

when it works it's fine but a lot of people are scared of it failing because the consequences are severe. For me, on an old motor used in salt water, I don't trust alarms, and I expect that any component, from pump to pick-up, could fail, as well as forgetting to check and fill. My first 70 had it and the replacement 70 has it disconnected, and as everthing gets older (mine were/are 1988 and 1987) I prefer not having it. I might feel differently if I used the boat a lot, but it sits and then gets occassional use, so mixing is nit that big a deal.

To me, the problem is that it is not gravity fed, like a yamaha. even the big Yams have a reservoir inside the cowl.

If you disconnect it, I understand there are some parts or steps you need, but I don't know them, but you can't just unplug it apparently.

Me, I'd get the alarm tested and then keep it, but cut it off at the first sign of trouble. Check the hose and bulb throroughly as well as the condition of the oil at the bottom of the tank (mine filled with water once).

 

[joelybob]

Re: 1997 70hp oil injection question

it's crazy how many different opinions there are on this subject. yesterday at one point i had myself talked into doing away with injection then reading some pro injection comments i decided to keep system in place. sounds like if you take care of your equipment you wont have have any problems. thanks chris and home

 

[seahorse5]

Re: 1997 70hp oil injection question

This has been posted on the 'net many times:

continuousWave: Whaler: Reference: VRO Fuel-Oil Mixing

 

[phillnjack2]

Re: 1997 70hp oil injection question

100% disconnect the vro /oms its a terrible idea that is prone to breakdowns.
there is too many variables that have to be perfect for this to work good, and OMC knew before it was fitted that it
was prone to failure or they would not of supplied the yellow plugs ready for it to be converted back to pre-mix.
it was just a gimmic to get past the emissions for a few more years.

if people are that concerned about oil on the water or emissions they would not buy a 2 stroke anyway !!!!!!!!!

The alarms are prone to not work, and even when they do they dont shut the motor down completely,they just
send into slow mode.
by the time this happens its too late, the engine will of been so badly damaged that it needs a complete rebuild.
the only true way of knowing your getting the right amount of 2 stroke oil is to mix it in with the fuel when re-fueling.


some people say it saves putting oil in the petrol tank !!!!!!!well you still have to put it in the oil tank !!!!

the oil tank needs to be checked for any debris or clogging of the oil, the filter in oil tank needs to be checked regular
the wiring on the engine only needs a slight bit of dirt then no oil will be going through, if the oil line gets a kink again no oil.
the sensor for the oil alarm is another thing that can fail, ive got a dead one in front of me right now.
also if the brown wire should break then no alarm will go off etc etc etc, far too many things that can and DO go wrong
Its not rocket science to disconnect and go back to pre-mix and to mix it when re-fueling is so simple.

best to be safe rather than wait till it goes wrong then have to re-build the engine and spend $1000 plus.

plenty of people say is great, but they are either dealers or people who have not seen what happens when it goes wrong.
ive got two identical engines and both oil pumps have gone the same way,both oil alarms are dead, and both oil alarm sensors
are also breaking up.

The post above thats on the whaler forum is great, if everything is brand spanking new and all working perfect, but how
and when do we know that electrical or dirt problems are going to turn up. ?

Plus you know for sure your using the right amount of oil at wot throttle,youl never know this with vro/oms.

just my view on this subject,

5,500rpm then no oil at all getting to the internals,fresh clean petrol flushing the crankcase BANG BANG BANG and
Then the alarm goes off !!!!


phill.....

 

[joelybob]

Re: 1997 70hp oil injection question

I know its been posted many times just wanted some new input. All good points phill. I have read some postS that claim that motor has a tick in it after they unhook vro and stuff like that. thats why i was alittle skeptical. what to do, what to do. looks like a very simple diconnect. I watched a few videos on it. I guess I will have to do some more thinking on it. thanks Joel

 

[trendsetter240]

Re: 1997 70hp oil injection question

I know its been posted many times just wanted some new input. All good points phill. I have read some postS that claim that motor has a tick in it after they unhook vro and stuff like that. thats why i was alittle skeptical. what to do, what to do. looks like a very simple diconnect. I watched a few videos on it. I guess I will have to do some more thinking on it. thanks Joel

It's very easy to do and you can switch back to oil injection after if you decided it's too much hassle to pre-mix. I disable the oil-injection on all my motors older than 2000.

Simply mix oil into your gas tank at 50:1, run the motor until the mixed fuel has had a chance to work it's way into the motor, then unplug the two wires at the VRO and put a plug on the oil inlet. Simple.

No tick from disabling VRO, the engine will run exactly the same.

 

[Chris1956]

Re: 1997 70hp oil injection question

Phil has provided some opinions that are not appropriate to the OMS system, and some that are just plain incorrect. His first two points do not apply to the OMS system. The OMS systems are reliable and do not come with plugs to convert to premix. His third point is wrong, conventional oil injection systems use just about the same oil as premix systems, and the emissions are the same. Only Direct Injection engines use less oil and fuel.

The oil alarms do not affect the running of the motor, and they are pretty robust. The low oil alarm is a float, which is pretty reliable. The no oil alarm is a motion sensor, which is also fairly reliable. Of course maintenance is important to keep them working properly. Only the overheat alarm will send the motor into SLOW mode.

Finally the OMS system provides a fixed gas-oil ratio to the motor, at all speeds. The ratio is fixed at what the motor needs for WOT operation, which is the same ratio as premix uses.

I do recommend you keep the oil tank full, and keep an eye on the wiring to the alarms. I also keep a gallon of 2 cycle oil in the boat, in case I run out, or the No Oil sensor sounds. I will then premix the gas in the tank and troubleshoot the system, before relying on the Oil injection again.