f-12 fuel problems

tim d. · Oct 19, 2009

i have a 37 f-12 distillate, and have a problem with it running out of fuel when i go up a hill. the brass tee at the bottom of the vent housing in the hood between the pump and carb was replaced with pipe fittings at some time in the past. it has lowered the feed line to the carb so it is level. could this be the problem? i've rebuilt the pump and the carb and it runs great on the flats. i also have bubbles in the sediment bulb on the fuel pump. is this normal or do i have another problem? thanks for any help!

Dave Allgire · Oct 19, 2009

You need to get the right tee for the bottom of the fuel vent. It has a restricted opening in the top of the tee that screws into the fuel vent. This ensures that there is more pressure in the line to the carb than to the vent. With your regular pipe fittings the path of least resistance is to the vent so when you are going uphill, gravity will pull more fuel to the vent than to the carb. I have two F-12"s and one has bubbles and the other does not. It doesn"t appear to affect the operation of either one. I suppose if there is an air leak in the line from the tank to the pump you will see bubbles. But on the other hand you should see a gasoline leak at the same point when it is not running. I would check all of your connections.

tim d. · Oct 19, 2009

thanks dave, thats what i thought but without a tee to look at you can't tell. do you have any idea where i can locate one?

Tom Fleming · Oct 19, 2009

Check with John at Burgh's Equipment. just search the net, it is in Porter'sville, Pa.

f-12 fuel problems

tim d.

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Dave Allgire

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tim d.

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Tom Fleming

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