1999 Evinrude Intruder 175 VRO

[pa32mays]

Does anyone know how much compression it takes to drive the VRO pump? I have a low cylinder on no. 6 but its only down around 60psi. Isnt the VRO connected to that cylinder? My VRO has never pumped since I got this engine but I bought it with a low cylinder so I have never ran it on the water. Looking to find out if the VRO is not working because of the compression or its bad.

 

[pa32mays]

Re: 1999 Evinrude Intruder 175 VRO

Today I put a vacuum gauge on the port that drives the VRO pump. It is moving my gauge about 10psi of vacuum when I am cranking the engine.
Anybody know if thats enough to run the pump? I am starting to think the pump is bad.

 

[boobie]

Re: 1999 Evinrude Intruder 175 VRO

My question would be, 60 psi from what ? The other cyl's ? It's not vacuum that runs the pump but pulses from the cyl itself. If the pulses are really weak it will effect the pump. I'd worry more about the psi difference right now than the fuel pump.

 

[seahorse5]

Re: 1999 Evinrude Intruder 175 VRO

There is no 175 "VRO" Evinrude. You have the wrong year - what is the model number?

The "VRO" is tested by the output fuel pressure while running. You use a vacuum gauge for checking the boat's fuel system for airleaks or restrictions. The service manual explains how to bench test the "VRO" for internal problems.

At 60psi compression on #6, get that fixed ASAP to avoid more expensive damage.

 

[boobie]

Re: 1999 Evinrude Intruder 175 VRO

There is a 1999 Johnson 175 VRO. Post a Model ###.

 

[ezeke]

Re: 1999 Evinrude Intruder 175 VRO

The parts site lists 10 Evinrude 175HP model numbers for 1999. All came with OMS.

Vacuum is often measured in inches of Mercury. Pressure is often measured in PSI.

You do test the pulse line and the pump to see if it will hold 15 psi; that's the first test in the chart for testing the VRO/OMS pumps.

If you do not fix the 60 PSI cylinder fairly soon, you won't have to worry about it much longer.

 

[pa32mays]

Re: 1999 Evinrude Intruder 175 VRO

Its not a VRO model like the older ones. I was just stating a VRO question about the pump. The only reason I continue to resolve this is because every time I run it a few minutes on the hose pipe to try and get the pump working my compression comes up a little bit more on that cylinder. I am not getting the pump to work on the oil or the fuel side.

 

[seahorse5]

Re: 1999 Evinrude Intruder 175 VRO

The parts site lists 10 Evinrude 175HP model numbers for 1999. All came with OMS.

For 1999 the 10 listed Evinrude 175's are FICHT engines - none with "VRO" or OMS systems

 

[pa32mays]

Re: 1999 Evinrude Intruder 175 VRO

The data plate is all 1999.

 

[seahorse5]

Re: 1999 Evinrude Intruder 175 VRO

The data plate is all 1999.

and what does the data plate say for the engine model number?

 

[pa32mays]

Re: 1999 Evinrude Intruder 175 VRO

OK, looks like there are 2 data plates. The one on the tilt mechanism says E175 GLEOM. There is another one that must be on the powerhead that is now hidden by the cowling. I must have looked at that one when I had the lower cowling off because now I cant find it. It was the one that had 1999 written all over it. Maybe this engine has a newer powerhead installed on it.

 

[ezeke]

Re: 1999 Evinrude Intruder 175 VRO

That's 1995

 

[kybill66]

Re: 1999 Evinrude Intruder 175 VRO

if you want to see if the vro is pumping oil you get a clear piece of hose about 8 inches long in the middle mark every half inch for up to 3 inches and the hook it up on the vro were the oil line is.Fill the line up with oil, Start the motor and with a stethascope you lesson for the pulses in the vro and when the oil gets down to your first mark on top i believe it was 6 to 8 pulses it should have used the 3 inches of oil that you have marked.

 

[pa32mays]

Re: 1999 Evinrude Intruder 175 VRO

Well, the guy told me it was a '95 when I bought it but i saw that data plate and it showed '99. Guess its got a newer powerhead on it then. Is there a way to test a VRO pump on the bench?

 

[pa32mays]

Re: 1999 Evinrude Intruder 175 VRO

I have done the clear pvc test and it is not pumping oil at all. Its not even pumping fuel. I have to pump the primer bulb to keep it running. I mixed the fuel/oil in the tank until I know its pumping oil.

 

[ezeke]

Re: 1999 Evinrude Intruder 175 VRO

Test it by the book: http://www.maxrules.com/graphics/vropics/VROflowchart.JPG

Your pump is OMS, but the chart in the 1995 and 1997 factory service manuals is the same as this one.

 

[seahorse5]

Re: 1999 Evinrude Intruder 175 VRO

Well, the guy told me it was a '95 when I bought it ...


Is there a way to test a VRO pump on the bench?

That is why the model number is very important to know which exact engine is being discussed.

Here is a flow chart for a quick bench test of the "VRO""

 

[pa32mays]

Re: 1999 Evinrude Intruder 175 VRO

Thanks for the flowchart Seahorse! I will do that tonight when I get a chance!

 

[d.boat]

Re: 1999 Evinrude Intruder 175 VRO

Also read this if you haven't for a good intro to how the pump works, strengths and weaknesses:

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

If you're having problems with both the fuel and the oil, it points to something faulty in the pulse line (probably cheap and easy to fix if it's the hose or the pulse limiter, not so if it's cylinder compression that's the culpret) or the air motor (=new OMS pump).

Or, of course, both the fuel and oil sides could actually be failing independent of the air motor, but the result is the same.

I'll be interested in hearing what you find, good luck!

By the way, shouldn't you be trouble shooting the compression issue first?

 

[SparkieBoat]

Re: 1999 Evinrude Intruder 175 VRO

I have a 1995 GL model 150 with 120 psi compression on all cylinders.
From what I understand the 150 GL has the 175 higher compression heads and is supposed to produce 165 HP. But my point is that many v-6 motors have only around 90 psi compression, but the gl model should be high compression around 120...what are your other cylinders??? because 60 is very low. It is real easy to remove the head and replace the orings, doing this in conjunction with a decarb may solve your problems...you need to fix the compression issue before the fuel pump issue.