VRO2 Pump?

[rkersh409]

Should gas be coming out of the pulse hose when pumping up the bulb on a 1995 Evinrude 175hp motor? I am trying to find my air leak/fuel leak. And noticed when I pull the hose off the blue check valve gas poured out. Also when I'm pumping the bulb gas leaking out.

 

[rickdb1boat]

Re: VRO2 Pump?

No. Fuel should not be coming out of the pulse fitting on the pump. There is an internal leak in the pump. Rebuild or replace...

 

[GlasV162]

Re: VRO2 Pump?

The VRO pump can be rebuilt, in spite of what your dealer may tell you. If he offers the rebuild kit, you have an honest dealer. If he tells you the pump can't be rebuilt, leave because he's a crook. I had this happen to me and was sold a new pump when all I needed was the rebuild kit. Over $400.00 later I'm still fighting with him and in the middle of a BBB complaint; I guess the only good thing that can come from that is I can now warn others like you against unethical dealers. Rebuild kit is available at www.maxrules.com

 

[rkersh409]

Re: VRO2 Pump?

Thanks GlasV162 for the heads up. I called my dealer and he has two kits. One for the air pump and one for the fuel pump side for $20 each. He did tell me though that if the oiler side is bad that they don't make kits for it and I would have to buy a new pump.

Let me ask this, could a leaking fuel diaphragm into the air pump cause it to loose pressure in the bulb?

 

[rickdb1boat]

Re: VRO2 Pump?

Yes....If fuel is being pushed into the crankcase...

 

[rkersh409]

Re: VRO2 Pump?

Thanks Rick, you have been a big help! Now hopefully this will fix all my problems. Heck maybe it will fix the bad torque problem im having also. Just kidding!

 

[rkersh409]

Re: VRO2 Pump?

Well today I installed the repair kit. Only thing it was still leaking gas back into the crank case. Pulled it apart again and saw there was a rubber gasket between the air chamber and the fuel chamber. Of coarse that gasket didn't come with the repair kits, and you cant buy it. So I put some silicon in with it and let it dry. That fixed that problem. But I still have a leak somewhere and both floats (evaporator and carbs) are not stopping the gas. So im back to square one.

 

[Beacham]

Re: VRO2 Pump?

how did this end up? I am getting ready to rebuild my VRO, trying to troubleshoot a problem with flooding after it warms up. cold, the bulb primes and stays firm, but after it has warmed up, I cant start again because of flooding. bulb goes soft again when its warm. (see neighboring thread "Evinrude 225 Only Starts when Its Cold" if you are interested)

-all the carbs and ports are fine, so I am hoping that the VRO rebuild will be the end of my worries.

 

[rickdb1boat]

Re: VRO2 Pump?

Silicone was not a good choice. It will deteriorate and clog the carbs...Especia;;y if there is ethenol is the fuel you purchase...The carb. needles should close tight and not allow fuel past them. If they are leaking, then either the seats are bad or the needle is bad...

 

[rkersh409]

Re: VRO2 Pump?

Rick I used the blue rtv stuff that you use on cars. It said gas safe so we will see. I found the leak in the carb. It was leaking from in between the throttle body and the carb. Took it off and replaced the gasket and it stopped leaking. I don't think the carb was the problem. I think the gas was coming up into the carb and running out the carb throat.

Now the bulb is getting firm and staying firm for about 30 minutes now. My next part to change will the the primer bulb. When I took the gas line off of the inline filter I plugged it off and primed the bulb. It got good and firm but I was still able to squeeze it flat. I'm thinking the primer bulb's check valve isn't working great.

 

[rickdb1boat]

Re: VRO2 Pump?

You may also want to check the quick disconnect on the motor. Common source for leaks...

 

[R.Johnson]

Re: VRO2 Pump?

There seem's to be this constant confusion regarding primer bulb's. When the engine is running, that bulb is nothing but a wide spot in the fuel line. Fuel is being drawn through the bulb, not pushed, there is no reason for it to stay firm, in fact, that would be physically impossible. If it were being drawn, or sucked in, that would be a fuel restriction on the inlet side, and a different matter. As for putting a kit in the VRO pump, the pump must pass the pressure, and vacuam test as discribed in the manual on reassembly. You can't just bolt it to .the engine, and hope for the best.

 

[rkersh409]

Re: VRO2 Pump?

Rick I do not have a quick disconnect on the motor. The hose plugs onto a nipple and has a hose clamp on it. That was the first thing I looked for.

R.Johnson I have never checked the primer bulb while it was running. When I check it I am behind the boat pumping the bulb up and within minutes it is soft again. Never with the motor running. As far as the VRO it was spitting gas into the crank case through the air pump pulse fitting. So passing the vacuum test or not. Its not supposed to do that. It had to be taken apart and fixed. And since I'm there why not put a kit in it.

That leads me to this question. If you prim the bulb and leave it alone (never starting the motor) should it stay firm when you come back sometime later?

 

[R.Johnson]

Re: VRO2 Pump?

If the pump would hold pressure, and vacuam, you would not have that leak. Did you perform this test? As for the bulb holding pressure with the engine at rest, that whould depend on the condition of the check valve's, and all fitting's. If you were to cut one of those bulb's apart, you would find the valve's to be not the last word in quality.

 

[rickdb1boat]

Re: VRO2 Pump?

Especially aftermarket bulbs......

 

[hookedonjc]

Re: VRO2 Pump?

Heres what I found with mine. Trying to find a power loss problem I disasembled the VRO2 and found the fuel/oil side had a busted diaparam the orange colored one. I got a used one from a local mech he just gave me the whole thing. There are only two ways that I see you could get fuel to the air side 1 cracked body or 2 seal where the shaft goes through the body to the fuel side. Im not sure what the guy means when he said no kit for oil side. theres only one diaphram that is double acting for fuel and oil. I oppted to pre mix sence it caused me a rebuild. Any way this helped my bulb to stay tight longer but even then after a day sitting it losses pressure could be partly due to ambient temperature change. I thought it might have been the anti siphon vale in the tank but after pulling it out I discovered it didnt have one.
I would not trust the RTV in the pump you are setting yourself up for failure. Go find a local mech and see if he has an old one. Those guys cant stand VRO s any way. theres a good link on maxruels web site it gives an excelent breakdown of the VRO do a search for it. Its on one of my previous post somewhere.

Dont Ever Give Up

 

[rickdb1boat]

Re: VRO2 Pump?

http://continuouswave.com/whaler/reference/VRO.html ] VRO Breakdown[/url]


And some testing boatpartstore com/vrotable.asp

 

[kenmyfam]

Re: VRO2 Pump?

http://continuouswave.com/whaler/reference/VRO.html ] VRO Breakdown[/url]


And some testing boatpartstore.com/vrotable.asp

Great Links. Thank You.

 

[rkersh409]

Re: VRO2 Pump?

Yes thanks guys I have looked and looked at that vro break down. You are right my leak was the gasket where the shaft goes through the chambers.

As far as the test goes no I haven't done it yet. I will have to go find a pressure pump and gauge. I am thinking that my air leak is some where after the VRO pump. While I am standing by the motor after pumping up the bulb I can hear something squeaking as its losing pressure. Its up towards the top of the fuel bracket. Up near the top carb and the evaporator separator. It sounds like a piston being pulled through a cylinder with no oil. (Don't know how to describe the sound). Does this help?

 

[hookedonjc]

Re: VRO2 Pump?

Welp I think I know the sound you are talking about mine does that also but it stops once the float chambers are full and the bulb stays tight. Does yours just keep on pumping and keep making that sound? or does it eventualy stop? I wander if you got a float not set correctly? Maybe a needle valve not seating off in the carb. If you just keep hearing the fuel flowing into the carbs and dosent eventualy stop its sounds like the needle valve not seating off.

Dont Ever Give Up