I'd put in priming pumps to fill the racor and everything past it. Just my $.02.
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05-24-2018 07:31 PM #11
Re: Breaking fuel line for Floscan sender
Scott
41C117 "Hattatude"
Port Canaveral Florida.
Marine Electronics and Electrical Products Distributor.
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05-25-2018 09:53 AM #12
Re: Breaking fuel line for Floscan sender
Interesting concept. I understand the functional intent and I like the redundancy this provides.
Question: doesn't this approach also pressurize any upstream filters (primary, Racor)
on the engine being primed? Is this a problem since Racors are typically on the vacuum side of the
fuel feed?Ken C.
Comfort Zone
1978 42' Bertram FBMY
Sandusky, Ohio
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Re: Breaking fuel line for Floscan sender
I've never tried that on the primaries. My Racors are partially gravity fed from main fuel tank. I've always carried a jug of fuel to top them off at filter changes. But with the engine to be primed running and the cross feed valve partially closed, the Racors will be under vacuum.
The secondary does fill and pressurize when the cross feed valve is open. As I mentioned earlier, it's a neat and clean way to swap filters.Semper Siesta
Robert Clarkson
ASLAN, 1983 55C #343
Charleston, SC
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05-25-2018 12:28 PM #14
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05-29-2018 03:38 PM #15
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05-30-2018 03:55 AM #16
Re: Breaking fuel line for Floscan sender
Final result:
I warmed the engine for a couple of minutes to guarantee an instant start. Then plumbed in the Floscan sender at the break in the fuel line near the stabiliser cover. There was no fuel in the line at all. I also did not bother to use the new priming connection (see earlier photo.)
Started the engine and it ran perfectly smoothly with only a hint of any air bubbles. After 20 seconds it had all cleared. I guess the engine's fuel pump is pretty efficient and can draw diesel quickly from the Racor/tank. In fact there were more starting/air issues when I recently replaced the engine mounted filters which are after the fuel pump.