Originally posted by dang10010 on the Biofuels B.board:
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The fuel filter has a T on the filter where it either returns to the tank or back to the pump. I have had a clogged filter (not the stock filter) and it resulted in no oil (fuel) being returned to the tank. Hope this helps.
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From this I gather that in stock format the fuel return cycles back thru the filter then gets T'd off to either engine or tank. Basically it has a built into it what I was calling the "Modified Fuel Return Loop"
Can anyone verify this?
If this information is correct I could see putting a valve in the return line after it leaves the filter that I could use to restrict the flow of the returning fuel thus forcing more to go to the engine than goes to the tank.
More detail on the other option I mentioned:
3-port gasser fuel filter:
Maybe put this on the return before the MB fuel fliter line and loop the main fuel out back to a T into going into the fuel filter and "smaller line" going out to the tank. Plug the return line from filter to tank at the filter. Though this is inexpensive it is sorta dumb to add this in if the MB fuel filter sorta does air bleed already.
Originally posted by JonO on the Biofuels B.board:
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...common disposable automotive fuel filters that have a 3rd port with built-in restriction. This is to keep fuel flowing through the lines therby avoiding vaporlock (obviously for carbureted cars). Cost about $4 at any parts store. Just clamp one into the loop and it'll vent a trickle of fuel anywhere you like.
Cheers,
JohnO
Fram G3798, G3583, Purolator F21117, Wix 33040
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COMMENTS PLEASE!!
some question areas are:
How much fuel is returned to the tank in general in stock form on the MB 617 engine. 90% 30% ??? 100%
what are all the lines into and out of the fuel filter. Their are quit a bit. Sorta looks like a sprouting potatoe its got so many hoses branching off it
I'm sure I could figure most out but I dont have one sitting next to me in this little messy office of mine
and it would nice to have something to verify my thinking is correct when I stat putting it all together anyway.