92 150 johnson starting problem

[mckellar]

vro pump apparently continues to allow oil into carburetor after shutting off which makes starting very difficult after several days of non-use . what could cause this and how to fix. thanks

 

[rabeck5792]

Re: 92 150 johnson starting problem

relieve the pressure in the vro tank.

 

[ezeke]

Re: 92 150 johnson starting problem

The VRO/OMS systems do not have pressure tanks; that's a Mercury system. The VRO/OMS systems have only one hose and the oil is pulled from the vented tank by the pump. There is evidence that gravity can sometimes cause oil to continue to flow if the oil tank is set high and the gasoline flows back to the gasoline tank, creating a vacuum. You could add a petcock to the gasoline line if you don't have a working backflow valve in your primer bulb.

It is more common for an air leak on the gasoline side of the pump to cause the oil side to over-oil.

You may also want to service your recirculation check valves.

 

[mckellar]

Re: 92 150 johnson starting problem

The VRO/OMS systems do not have pressure tanks; that's a Mercury system. The VRO/OMS systems have only one hose and the oil is pulled from the vented tank by the pump. There is evidence that gravity can sometimes cause oil to continue to flow if the oil tank is set high and the gasoline flows back to the gasoline tank, creating a vacuum. You could add a petcock to the gasoline line if you don't have a working backflow valve in your primer bulb.

It is more common for an air leak on the gasoline side of the pump to cause the oil side to over-oil.

You may also want to service your recirculation check valves.

thank you. please tell me about servicing check valves.