951 Oil Injection Only Feeding One Cylinder

[highcam]

I have searched quite extensively but cannot find another account of this issue.

I have 3 951 GTX's and have an issue in one that I cannot make sense of. (Point being I can swap parts around if necessary)
Recent maintenacne to the oil injection system includes:
-New feed lines
-New oil filter
-New lines from oil pump to cylinders.

The oil reservoir does leak, but I believe the leaking is at the molded seam. As a result the resevoir still holds a significant amount of oil. I plan to repair the tank or rob one from one of the other 951's I have.

The oil line to the pump is full of oil and clear of any air. The problem is that only one of the feed lines to the cylinder fills with oil. The second line has some oil, but not much. At initial run in of the new lines (premix in tank), there was a small amount of water fed into the problem oil line. I do not know where the water came from (3-4 drops worth). I used about 11 gallons of gas (premixed) last weekend on the lake, so there has been plenty of time for both oil lines to fill.

I suspect there may be an issue with the injection nozzle at the cylinder. I cannot imagine there is a problem with the pump if it is able to pump fine on one line.

Thoughts? Has anyone else encountered this?

 

[pwgsx]

First I would open the bleed screw and check for air. Second, I would run the ski and hold the pump are wide open and see what happens. If that all fails I would say the 1 way check valve on the intake might be clogged or bad. Doubt its the pump but you can replace that too.

 

[mikidymac]

You can spray carb cleaner and compressed air through the intake check valve to make sure it is clean and clear.

 

[highcam]

Thank you for the responses. I will check this but...Where is the intake check valve you are referring to?
I have looked through the oiling diagrams, but I do not see any check valves.

The only check valve I see is on the top of the oil tank. Is this what you are referring to?

 

[mikidymac]

It is part of the brass fitting that is pressed into the intake manifold if I remember correctly.

 

[pwgsx]

yes its the brass fitting, it holds oil in the line to keep it primed.

 

[highcam]

I have performed the following checks and identified the problem. Maybe this will be useful to someone in the future.
Check valve on tank: Ok
System feed and pump free from air: Ok

I then went on to check the brass fittings on the intake manifold. The easiest way to do this was to remove the clear line from the pump side. Upon removal I noticed that somehow the line had split near the nipple of the pump and was not make a good seal. Carb fluid was then pushed through the line and brass fitting to ensure function. The line was trimmed and reinstalled. I used the starter to cycle the engine (carbs, intake and exhuast pipe are removed) while holding the oil pump wide open (zip tie on throttle cable).

The oil system is working correctly and I have verified flow all the way to the intake.

I did not originally think to check the lines as they are brand new and as a result I omitted them from being a problem. I am not sure how one split.

Thank you all for the assistance.

 

[mikidymac]

Nice! Glad you finally found it.