Re: 51 200 fuel pump

Posted by HH56 On 2023/3/25 17:22:19

What Don said about the short flex hose. They can look perfectly fine on the outside but with old age and possibly hardening the inner liner can crack with the movement needed to disconnect and reconnect to the pump. A piece of the liner can move out and block the bore.

Another thing is to made sure the fuel line is clear and fuel can get to the pump. If the line was open for any length of time there are insects that love to find small open tubes like that to lay their eggs in. We have one locally that can build and thoroughly plug a hose or line within a day or so of it being left open.

If you have not done so already it might be a good idea to disconnect the fuel line into the pump and use a gentle push of compressed air to get fuel into the line. Have the air hose positioned in the opening and by holding your hand over the fill opening to close it off, let a bit of air pressure push fuel all the way to the pump. That can also be a good method to find any pinholes in the tubing. Any tiny opening that allows air to enter and the pump will pull the air instead of fuel.

The way the pickup tube is positioned inside the tank, if the fuel level in the tank is below about the third or halfway mark fuel will usually not run out on it own. It can sometimes take a considerable amount of cranking to get fuel all the way up to the pump if the line is completely dry.