Pick up pipe in tank.

[peteK]

Whats the optimum height from bottom of tank to have the pick up pipe,the tank is 9" deep.

 

[pvb]

You just need some clearance at the bottom, to help stop any crud being sucked up. Half an inch or an inch would be fine.

 

[peteK]

Had to remove tank due to water in fuel and found it was 1.75ins from bottom of tank,not sure whether to extend it as surely when it gets rough you have 1.75ins of crud mixing in with the fuel instead of 0.5 ins ,be interested what others say.

 

[lw395]

Closer the better.
Get the dirt in the filter where it can be removed.
Also, in a lively sea, it's easy to draw air if the pickup is high and the tank is only partly full.

 

[RichardS]

Whats the optimum height from bottom of tank to have the pick up pipe,the tank is 9" deep.

Do you have any kind of drain point in the bottom of the tank or a dip tube which extends below the pick up pipe?

1.75" clearance in a 9" tank sounds as if you are losing far too much tank capacity but perhaps that is because there is no way of draining? In the absence of an alternative drain point I would be looking at extending the pick up by another inch.

Richard

 

[peteK]

At the end of the pick up pipe is a small filter about 2inches long,there is no drain on the tank and managed to drain the tank by removing the fuel sender and using a pela suction thing.Its about 10 gallons.So its wide compared to height.

 

[NormanS]

At the end of the pick up pipe is a small filter about 2inches long,there is no drain on the tank and managed to drain the tank by removing the fuel sender and using a pela suction thing.Its about 10 gallons.So its wide compared to height.

"Wide compared to height" is the worst possible shape for a fuel tank. If you are heeled, the fuel all goes to one side, so your pick up pipe is liable to draw air. I wish boat builders would install sensible tanks.

 

[peteK]

Not the ideal shape I know but the boat originaly had an outboard before I bought here,so was thinking of
of removing filter in tank and extending pick up pipe about an inch that way the crud wont build up in
tank and change the engine filter more frequently.