VRO Horn at idle speed, PART 2!!! HELP!!!

CadillacsCowgirl

Petty Officer 2nd Class
Joined
May 9, 2012
Messages
101
Ok, so on our last outting a couple of weeks ago, everything was working fine, we took the boat out and it ran flawlesly. We got a "low oil horn" because our VRO tank was down to 1/4 full. We also had an issue with running out of fuel with a 1/4 tank left. To correct that I removed the anti-siphon barb fitting on our 30gal fuel tank outlet. Problem solved. I also filled the oil tank and primed it with the ball. So, onto today...
Our '89 GT150 with VRO-II fired up at the ramp first try, as usual, then stalled a few times, again, as usual!!! We then took off down river and all seemed fine. About an 1/8 mile down river the NO OIL Horn sounded and I shut it down instantly. I checked all connections, pumped the ball a couple times, refired and it was good. We ran it to the next idle zone a few miles down river, after a couple minutes, the NO OIL Horn sounded once again, I went back, opened the hatch and pumped the ball a couple times and it stopped, but at idle it was going off every few minutes, pumping the ball would shut it off. Another run at cruising speed, no issues, but it continued to go off at idle speed every few minutes and it sputtered and stalled a few times at idle as well. So we turnned back, and on the last run at cruising speed it went off as well, requiring a couple of pumps on the primer ball. The ball was pretty firm the whole time, but a few good squeezes would silence the alarm for a short while.
I am sorry for writing a book but wanted to give as much info as possible. We are guessing that the VRO/fuel pump is going bad. Any opinions or advice will be greatly welcomed! Please Help! We just want ONE trip on our "New To Us" boat to go without incident! Thanks!!!
 

CadillacsCowgirl

Petty Officer 2nd Class
Joined
May 9, 2012
Messages
101
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

Just took off pulse limiter valve/fitting and cleaned it, replaced all the clamps with oem clamps, but it didn't seem blocked, but did have plastic wire ties where clamps should be. I don't think it's going to fix it. Again, any help/opinions would be appreciated!
 

woody66912

Senior Chief Petty Officer
Joined
Jul 12, 2008
Messages
690
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

Sounds like your VRO is toast, you have two choices, either replace the VRO for $400.00 plus labor, or use just the fuel pump side and mix your fuel. If you chose to run the only fuel side, then remove the oil tank and lines, and just unplug the VRO wire harness, NOTE you still will have your overheat warring.
 

CadillacsCowgirl

Petty Officer 2nd Class
Joined
May 9, 2012
Messages
101
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

We were afraid of that! Thanks for the reply Woody. With the stalling when first fired up and occasionally off idle when accelerating, is there a chance that the fuel side is weak as well?
 

CadillacsCowgirl

Petty Officer 2nd Class
Joined
May 9, 2012
Messages
101
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

Also, are either side of the pump(VRO/fuel) able to be rebuilt like the old style pumps? If so, is it feasible?
 

hidef

Lieutenant
Joined
Aug 22, 2009
Messages
1,465
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

You can rebuild the fuel side as long as the body of the pump is okay. Look at the supplied link it has a lot of fuel pump and VRO info including a troubleshooting flowchart.

http://www.maxrules.com/fixomcvro.html
 

Fofo

Recruit
Joined
Jul 6, 2012
Messages
4
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

What color is your pulse limiter valve? Before you order any parts presure test your vro to make sure the intermediate housing seal isnt leaking. Thats the only seal the rebuild kits do not have. If that seal is leaking you will have to buy a new vro/oms pump.
 

CadillacsCowgirl

Petty Officer 2nd Class
Joined
May 9, 2012
Messages
101
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

Thanks for the replies, great link hidef.
Our limiter is black. I've seen blue as well. What is the difference?
 

Fofo

Recruit
Joined
Jul 6, 2012
Messages
4
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

The blue faced limiter valve is a update over the older black ones
 

CadillacsCowgirl

Petty Officer 2nd Class
Joined
May 9, 2012
Messages
101
Re: VRO Horn at idle speed, PART 2!!! HELP!!!

Another great link, thanks for the info Fofo...
 
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