VRO output

[jenoble01]

Decided to install a clear hose on the output of my Vro. Engine is a J225TLERK. I noticed the flow of fuel is somewhat sporadic. It will flow good then it's like it skips a beat or something but it's a random deal. If I squeeze the primer bulb it fills the output hose up with fuel then it will run it almost empty a few seconds after ceasing to squeeze. I also noticed the VRO is clicking loudly, this also is odd in that it will click to a certain rythm, and then get faster like it's trying to catch up? I'm kinda confused here. I need to get a fuel pressure gauge and see what kind of pressure the pump is putting out, I would be willing to bet it's less than 1 psi the way it's behaving. Is this proper operation and I'm being paranoid or do I need to delve further into this area? I was having a problem with the engine stalling in gear at idle, cleaned the carbs and found the high speed jet loose, got that cleaned up and the engine no longer stalls but is still rough running and hesitating on take off. I'm also getting an alarm which led me to check out the VRO. The alarm is a constant tone with a no oil light. A constant tone is supposed to be an overheat condition unless close to WOT. I at first thought hmm, overheat then, but when I grounded the tan wire the hot light came on. I noticed some oil residue on the wires coming from the VRO and I suspect a crack in the housing but wanted to investigate a little further before removing it. If nothing else to satisfy my own curiosity. Any ideas?

Also, fuel line from tank to engine is new, newer fuel filter. I've also rebuilt the VRO pump about two months ago as it failed pressure test outlined in the factory manual.

 

[seahorse5]

Re: VRO output

Put the clear hose on the fuel inlet fitting and watch for air bubbles while the motor is running. If you see them, they have to be eliminated before further troubleshooting can be done. They will make the "VRO" click madly, as will an internal problem.

Here is a link that may help you understand the system better:

http://continuouswave.com/whaler/reference/VRO.html

 

[jenoble01]

Re: VRO output

Put the clear hose on the fuel inlet fitting and watch for air bubbles while the motor is running. If you see them, they have to be eliminated before further troubleshooting can be done. They will make the "VRO" click madly, as will an internal problem.

Here is a link that may help you understand the system better:

http://continuouswave.com/whaler/reference/VRO.html

Already found one air leak at the fuel tank side of the primer bulb, just happened to hear it when I was pumping the bulb. I usually pump the bulb from the other side of the engine so I haven't heard it before. thanks for the tip, that will help me see if the situation is resolved. Glad I bought 20 ft of clear tubing instead of a foot like I had planned, figured it may come in handy sooner or later. I strongly suspect there are other air leaks, just going to be a matter of finding them.

 

[jenoble01]

Re: VRO output

Bump...