Oil Pump Question

[RJKLEINER]

1997 gtx 787 rotax

Can anyone tell me if I have a problem with the Oil Injectors on my Intake Manifold. I installed the Oil Pump and put new oil lines from the pump to the injectors. After hooking the lines to the Injectors and before hooking them to the pump, I tried to blow air through the Injector to see if they were clear (did not use compressed air just blew in the tube) I was unable to get air to blow out the injector, they felt plugged. Should I be able to get air through or is this normal?

Your imput as always is appreciated!!!!

[Bill O'Neal2]

Re: Oil Pump Question

f you used a pop off tester, then you would be able to get air through the check valve in the oil injection nozzels. Blowing does not work.

[frankey01]

Re: Oil Pump Question

your mouthfull of air is not enough to go by the check valve you need more pressure.

[RJKLEINER]

Re: Oil Pump Question

Ok bill is cranking the motor before i get the carbs on going to show me oil coming out of the injectors??

I just want to make sure they are both putting out before i close it up and run it.

[Bill O'Neal2]

Re: Oil Pump Question

It will if you crank long enough ( overheating the starter motor, most likely). The way to test it, is with the air pressure pump. I use my pop off tester to check them. It should take approximately 1-1.5 psi to open them.

I first test an oil injector in the vise running it backwards with a reversable drill motor. Then I test the check valves in the manifold with the PO tester. After connecting everything to the motor, I first bleed the oil pump, then I bleed the oil lines to the injector nozzels. Once all of the bubbles have cleared the lines, I look for bluish/white smoke from the exhaust outlet behind the ski with the motor running.

[RJKLEINER]

Re: Oil Pump Question

Ok thank you!!

where is the bleeder on the pump?

[jandrew]

Re: Oil Pump Question

The bleeder screw is right between the two small oil line outputs.
Use the screw to bleed to the pump.

To bleed to the carbs, (intake manifold) I used premixed fuel in the tank, then started the motor and held the oil pump (not the throttle) wide open. Took about 10 seconds.

[Bill O'Neal2]

Re: Oil Pump Question

It's the shiney 8mm hex head longer than normal nut on the front of the oil injector pump.