Need help VRO on 91 johnson 150 faststrike

[navigator175]

I am in the middle of taking out VRO and going to pre-mix. The no-oil alarm was going off everytime I would go about 300 yds. at cruising speed. the engines is still creating white smoke, and all seems fine, but I am going to disconnect regardless. Anyways, I Pulled oil resevoir out. plugged the Oil line to engine, and disconnected the 2 wire application to block. My next step is to add oil to gas, then disconnect gas line into carbs and pump fuel line to till I see pre-mix.

My question is: did I remove alarm system by disconnecting wire, and am I missing any steps in the process?

Guidance would be greatly appreciated..

Cameron.

 

[ezeke]

Re: Need help VRO on 91 johnson 150 faststrike

There are two sets of wires that need to be disconnected.

The first is the oil tank, then the 4 wire harness running from the fuel pump to the main harness. The 4 wire amphenol plug for the fuel pump to main harness is sometimes tucked behind other components like the PT&T relay box, but follow the wires from the pump and you will find it.

If you have a vacuum switch that lets you know if you have a fuel obstruction, be sure to leave that tan wire connected.

It's good shop practice to seal the ends of the amphenol so that it can be reused if desired, and to prevent shorts.

 

[SparkieBoat]

Re: Need help VRO on 91 johnson 150 faststrike

also make sure the oil inlet on the VRO is sealed.

 

[navigator175]

Re: Need help VRO on 91 johnson 150 faststrike

Thanks much guys

 

[seahorse5]

Re: Need help VRO on 91 johnson 150 faststrike

I am in the middle of taking out VRO and going to pre-mix. The no-oil alarm was going off everytime I would go about 300 yds. at cruising speed.

Your motor has 4 different alarm sounds for various problems.

What was the exact warning horn sequence as you ran the motor? Was it a constant tone, a rapid on and off sound, or an intermittent horn every 20 seconds?

 

[navigator175]

Re: Need help VRO on 91 johnson 150 faststrike

It is fairly rapid. Probally 5 secs apart. Maybe fuel pump alarm?

I tried to run it last week without disconnecting the 4 wire harness stated above. I need to find these wires

Last week when I ran it (after the VRO bypass) The alarms started again. I wasn't worried due to the fact I know I'm burning oil now. Although, now the fuel pump is not working "I think" I have to keep pumping bulb in order to run.
Any suggestions?

 

[SparkieBoat]

Re: Need help VRO on 91 johnson 150 faststrike

did you plug/cap the oil inlet for your VRO pump? they do sell a non-vro style fuel pump for your motor..I just put one on my 96 150..about 300 bucks

 

[oldgradywhite]

Re: Need help VRO on 91 johnson 150 faststrike

I would find the problem with the vro system. They had there problems in 86 87 but they were fixed. I had a 88 johnson vro I never had a problems. That vro pump gets blame for every thing that goes wrong with these motors. I have seen guys that had and over heat alarm NOT a no oil alarm and there say time to remove the vro. Jest my to cents. pre mixing yes you know the mix is right most of the time but its a pain mixing oil and gas.

 

[navigator175]

Re: Need help VRO on 91 johnson 150 faststrike

Well the change over has been done. Mistake? I don't know.. Perhaps the alarms weren't even the Vro? Now I do have a fuel restriction problem. Is there a different fuel pump needed now? The boat runs great if I have someone pumping the bulb while at cruising speed.

Is it The wiring harness that I did not find. I only disconnected a 2 wire set giong to the engine. I did not find the other four wire harness.

 

[ezeke]

Re: Need help VRO on 91 johnson 150 faststrike

There are only either three or four wires in the harness running from the fuel pump; they need to be disconnected when running premix. The pump itself is mechanical and does not need any wires.

There is a separate vacuum switch near the fuel pump that has a tan wire that needs to stay connected.

The gasoline or premix side of the pump can be repaired if it is not working, but the oil side cannot. Scroll down here to "ALL VRO Pumps": http://www.maxrules.com/fixomcvro.html

 

[Rusty_Stainless]

Re: Need help VRO on 91 johnson 150 faststrike

Here's a couple of videos that will help you through disconnecting the VRO.
1996 Johnson 60hp
http://www.youtube.com/watch?v=P0EOnyUceDQ
1985 Johnson 140hp
http://www.youtube.com/watch?v=SGY-rUs3mcQ
If you are boating on a budget like most of us it is cheaper and simpler to disconnect the VRO system. The VRO system is made up of many parts and as your motor gets older they will progressively fail. VRO on a new motor is great but they can be an expensive nightmare when they wear out.
Save your money, disconnect, enjoy your boating.

 

[SparkieBoat]

Re: Need help VRO on 91 johnson 150 faststrike

that joker is way over revving his motor with not back pressure, I have read many warnings about doing this. my understanding is you should only run at idle speeds on the muffs, (under 1500 RPMs)

 

[moodyshield]

Re: Need help VRO on 91 johnson 150 faststrike

I have an engine problem which started immediately after the VRO was disconnected. I am wondering of the mechanic who did it missed something and having read this thread there are two issues I am wondering about.

First of all the problem I have is that the engine will cut out after the engine has been running for anything between 4 and 10 minutes (and I am therefore of the opinion it is not the fuel pump itself). I have a glass inline fuel filter just before the fuel pump and when primed it is full but slowly the fuel filter will emply out (is is the pump not stong enough?). Therefore I assumed it was a fuel starvation problem. I have checked everything from the tank to the engine including changing the fuel/water seperator and bypassing the primer bulb and I did notice an improvement in the length of time the fuel filter stayed full but it is slowly draining away.

Therefore I am wondering iof there is something in the engine which is causing the problem. Having read this thread there are two questions.

The first is the wires from the VRO pump were not disconnected (my engine has three wired). However I disconnected it and the problem still exists. What does disconnecting the wires do?

The second is capping the oil input on the VRO. The mechanic capped the oil pipe from the oil resevoir but did not capp it at the vro pump. However when I put my finger over the end there is no difference. Should I still put a small length of fuel hose on and cap it properly.

Any further suggestions?

 

[ezeke]

Re: Need help VRO on 91 johnson 150 faststrike

The VRO pump on your motor is mechanical like all of the VRO/OMS pumps. The wiring is for the warning system and has no other function.

The oil side of the pump will continue to pump air if it is not sealed, causing the motor to run very roughly (lean). Originally the pump came with a yellow plug for that purpose, but you could seal it with any cylindrical plug that will fill the hose and clamp it airtight with a hose clamp. Just cut the hose an inch from the pump and plug.

 

[Rusty_Stainless]

Re: Need help VRO on 91 johnson 150 faststrike

that joker is way over revving his motor with not back pressure, I have read many warnings about doing this. my understanding is you should only run at idle speeds on the muffs, (under 1500 RPMs)

I don't think you quite understand what was going on. The faulty VRO system would not allow the engine to run properly, that's why it was over revving.
And regarding "only running at idle speeds on the muffs" I think that joker's talking a lot of ......