I have not been on the site for a while but would appreciate some insight and help if anyone knows anything about these systems.
I will layout the items I have checked and done to eliminate and narrow down the issue.
On my 76 deg V6 1990 250hp 2 stroke motor the head reservoir is not filling up from the main tank.
I started at the main oil tank in the aft bilge and pulled that out, checked the and replaced the inline small filter prior to the pump which was clogged.
I then tested the pump itself by supplying power to the pump leads and it worked.
I jumped to the motor itself and switched the powerhead reservoir float sensors and the CDI units. - no change.
In the main oil tank there seems to be a sensor which goes to the bottom of the tank. I pulled that out and check it. It seems to break continuity if the tank is empty preventing the tank pump from running dry. When the tank has oil in it, the small float lift and creates continuity on the sensor so I think that is working fine.
Checked the four wires from the connector at the tank to the connector at the motor, all good continuity.
at the same connector I checked for continuity between the four leads to the connector plug which feed into the CDI unit - all good
At that connector in the motor which are the four wires coming from the tank, 2 for the tank sensor which creates continuity or breaks it if the tank is empty and a power lead and ground (blue and brown) if at this connector in the motor, I ground the blue wire and have the other three connected, the pump will run filling the power head reservoir.
So this leaves from the reservoir connector to the leads going into the CDI unit which checked OK for continuity.
So the CDI unit was switched, the reservoir sensor cap was switched with the other motor and all continuity checked out.
It seems as though, unless I am missing some relay, all systems are working and the call for oil is being sent out from the cap sensor on the power head reservoir. Somewhere along the line it is simply not getting the signal ground which as stated above will run the pump filling the tank but I can not keep this grounded as it will not shut off when full.
What am I bypassing by doing this. I think it is a call from the CDI unit but like I said this was switched with the working side.
Any help from someone who may know something about this.
Greg[/list]
I will layout the items I have checked and done to eliminate and narrow down the issue.
On my 76 deg V6 1990 250hp 2 stroke motor the head reservoir is not filling up from the main tank.
I started at the main oil tank in the aft bilge and pulled that out, checked the and replaced the inline small filter prior to the pump which was clogged.
I then tested the pump itself by supplying power to the pump leads and it worked.
I jumped to the motor itself and switched the powerhead reservoir float sensors and the CDI units. - no change.
In the main oil tank there seems to be a sensor which goes to the bottom of the tank. I pulled that out and check it. It seems to break continuity if the tank is empty preventing the tank pump from running dry. When the tank has oil in it, the small float lift and creates continuity on the sensor so I think that is working fine.
Checked the four wires from the connector at the tank to the connector at the motor, all good continuity.
at the same connector I checked for continuity between the four leads to the connector plug which feed into the CDI unit - all good
At that connector in the motor which are the four wires coming from the tank, 2 for the tank sensor which creates continuity or breaks it if the tank is empty and a power lead and ground (blue and brown) if at this connector in the motor, I ground the blue wire and have the other three connected, the pump will run filling the power head reservoir.
So this leaves from the reservoir connector to the leads going into the CDI unit which checked OK for continuity.
So the CDI unit was switched, the reservoir sensor cap was switched with the other motor and all continuity checked out.
It seems as though, unless I am missing some relay, all systems are working and the call for oil is being sent out from the cap sensor on the power head reservoir. Somewhere along the line it is simply not getting the signal ground which as stated above will run the pump filling the tank but I can not keep this grounded as it will not shut off when full.
What am I bypassing by doing this. I think it is a call from the CDI unit but like I said this was switched with the working side.
Any help from someone who may know something about this.
Greg[/list]